Patent Publication Number: US-2023144353-A1

Title: Board connector

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     The present application is a National Stage of International Application No. PCT/KR2021/002843 filed on Mar. 8, 2021, which claims priority to and the benefit of Korean Utility Model Application No. 10-2020-0033572, filed on Mar. 19, 2020; and Korean Utility Model Application No. 10-2021-0029518, filed Mar. 5, 2021 the disclosures of which are incorporated herein by reference in their entirety. 
    
    
     FIELD 
     The present disclosure relates to a board connector installed in an electronic device for electrical connection between boards. 
     BACKGROUND 
     Connectors are provided in various electronic devices for electrical connection. For example, the connectors may be installed in electronic devices such as mobile phones, computers, tablet computers, and the like to electrically connect various components installed in the electronic devices to each other. 
     In general, radio frequency (RF) connectors and board-to-board connectors (hereinafter, referred to as “board connectors”) are provided inside wireless communication devices such as smartphones, tablet personnel computers (PCs), or the like among the electronic devices. The RF connectors transmit RF signals. The board connectors process digital signals of cameras or the like. 
     Such an RF connector and board connector are mounted on a printed circuit board (PCB). Conventionally, there is a problem that a mounting area of a PCB increases since a plurality of board connectors and RF connectors are mounted in a limited PCB space together with a plurality of components. Accordingly, with a recent trend of miniaturization of smartphones, there is a need for a technique in which the RF connector and the board connector are integrated and optimized for a small mounting area on the PCB. 
       FIG.  1    is a schematic perspective view of a board connector according to the related art. 
     Referring to  FIG.  1   , a board connector  100  according to the related art includes a first connector  110  and a second connector  120 . 
     The first connector  110  is provided to be coupled to a first board (not shown). The first connector  110  may be electrically connected to the second connector  120  through a plurality of first contacts  111 . 
     The second connector  120  is provided to be coupled to a second board (not shown). The second connector  120  may be electrically connected to the first connector  110  through a plurality of second contacts  121 . 
     In the board connector  100  according to the related art, as the first contacts  111  and the second contacts  121  are connected to each other, the first board and the second board may be electrically connected to each other. In addition, when some contacts among the first contacts  111  and the second contacts  121  are used as RF contacts for transmitting RF signals, the board connector  100  according to the related art may be realized such that the RF signals are transmitted between the first board and the second board through the RF contacts. 
     Here, the board connector  100  according to the related art has the following problems. 
     First, in the board connector  100  according to the related art, when contacts, which are spaced apart by a relatively small distance, among the contacts  111  and  121  are used as the RF contacts, there is a problem in that signal transmission is not smoothly performed due to RF signal interference between RF contacts  111 ′ and  111 ″ and between RF contacts  121 ′ and  121 ″. 
     Second, the board connector  100  according to the related art has an RF signal shielding unit  112  at an outermost portion thereof, and thus there is a problem in that radiation of the RF signal to the outside can be shielded but shielding between the RF signals is not performed. 
     Third, in the board connector  100  according to the related art, the RF contacts  111 ′,  111 ″,  121 ′, and  121 ″ respectively include mounting units  111   a ′,  111   a ″,  121   a ′, and  121   a ″ mounted on the board, and the mounting units  111   a ′,  111   a ″,  121   a ′, and  121   a ″ are disposed to be exposed to the outside. Accordingly, there is a problem in that shielding for the mounting units  111   a ′,  111   a ″,  121   a ′, and  121   a ″ is not performed in the board connector  100  according to the related art. 
     SUMMARY 
     Therefore, the present disclosure is designed to solve the problems and is for providing a board connector capable of reducing the possibility of occurring radio frequency (RF) signal interference between RF contacts. 
     To solve the above problems, the present disclosure may include the following configurations. 
     A board connector according to the present disclosure may include a plurality of radio frequency (RF) contacts for transmitting an RF signal, an insulation unit configured to support the RF contacts, a plurality of transmit contacts that are coupled to the insulation unit between a plurality of first RF contacts among the RF contacts and a plurality of second RF contacts among the RF contacts such that the first RF contacts and the second RF contacts are spaced apart from each other along a first axial direction, a ground housing to which the insulation unit is coupled, a first ground contact coupled to the insulation unit and configured to shield between the first RF contacts and the transmit contacts with respect to the first axial direction, and a second ground contact coupled to the insulation unit and configured to shield between the second RF contacts and the transmit contacts with respect to the first axial direction. The first ground contact may shield between the first RF contacts and the transmit contacts with respect to the first axial direction, and shield between the first RF contacts with respect to a second axial direction perpendicular to the first axial direction. 
     A board connector according to the present disclosure may include a plurality of radio frequency (RF) contacts for transmitting an RF signal, an insulation unit configured to support the RF contacts, a plurality of transmit contacts that are coupled to the insulation unit between a plurality of first RF contacts among the RF contacts and a plurality of second RF contacts among the RF contacts such that the first RF contacts and the second RF contacts are spaced apart from each other along a first axial direction, a ground housing to which the insulation unit is coupled, a first ground contact coupled to the insulation unit and configured to shield between the first RF contacts and the transmit contacts with respect to the first axial direction, and a second ground contact coupled to the insulation unit and configured to shield between the second RF contacts and the transmit contacts with respect to the first axial direction. 
     According to the present disclosure, the following effects can be obtained. 
     The present disclosure can realize a shielding function against signals, electromagnetic waves, or the like for radio frequency (RF) contacts using a ground housing and a ground contact. Thus, the present disclosure can prevent electromagnetic waves, which are generated from the RF contacts, from interfering with signals of circuit components located around an electronic device, and prevent electromagnetic waves, which are generated from the circuit components located around the electronic device, from interfering with RF signals transmitted by the RF contacts. Accordingly, the present disclosure can contribute to improving electromagnetic interference (EMI) shielding performance and electromagnetic compatibility (EMC) performance using the ground housing and the ground contact. 
     In the present disclosure, it can be realized such that all RF contacts, including portions mounted on a board, are located inside a ground housing. Accordingly, the present disclosure can realize complete shielding by enhancing a shielding function for the RF contacts using the ground housing. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic perspective view of a board connector according to the related art. 
         FIG.  2    is a schematic perspective view of a receptacle connector and a plug connector in a board connector according to the present disclosure. 
         FIG.  3    is a schematic perspective view of a board connector according to a first embodiment. 
         FIG.  4    is a schematic exploded perspective view of the board connector according to the first embodiment. 
         FIG.  5    is a schematic plan view for describing a ground loop in the board connector according to the first embodiment. 
         FIG.  6    is a schematic perspective view of a first ground contact and a second ground contact in the board connector according to the first embodiment. 
         FIG.  7    is a schematic plan view of the board connector according to the first embodiment. 
         FIG.  8    is a schematic cross-sectional side view taken along line I-I of  FIG.  7   , illustrating a state in which the board connector according to the first embodiment is coupled to a board connector according to a second embodiment. 
         FIG.  9    is a schematic cross-sectional side view taken along line II-II of  FIG.  7   , illustrating the state in which the board connector according to the first embodiment is coupled to the board connector according to the second embodiment. 
         FIG.  10    is a schematic perspective view of a ground housing in the board connector according to the first embodiment. 
         FIGS.  11  to  14    are enlarged schematic cross-sectional side views of portion A of FIG.  8 , illustrating the state in which the board connector according to the first embodiment is coupled to the board connector according to the second embodiment. 
         FIG.  15    is a schematic perspective view of a modified embodiment of the ground housing in the board connector according to the first embodiment. 
         FIG.  16    is a schematic plan view of an insulation unit in the board connector according to the first embodiment. 
         FIG.  17    is a schematic perspective view of the board connector according to the second embodiment. 
         FIG.  18    is a schematic exploded perspective view of the board connector according to the second embodiment. 
         FIG.  19    is a schematic plan view of the board connector according to the second embodiment. 
         FIG.  20    is a schematic cross-sectional side view taken along line of  FIG.  19   , illustrating the state in which the board connector according to the second embodiment is coupled to the board connector according to the first embodiment. 
         FIG.  21    is a schematic plan view for describing a ground loop in the board connector according to the second embodiment. 
         FIG.  22    is a schematic perspective view of a ground housing in the board connector according to the second embodiment. 
         FIG.  23    is an enlarged schematic cross-sectional side view of portion A of  FIG.  8   , illustrating the state in which the board connector according to the second embodiment is coupled to the board connector according to the first embodiment. 
         FIGS.  24  to  27    are conceptual bottom views illustrating an embodiment of a mounting pattern of a board, on which the board connector according to the first embodiment is mounted. 
         FIGS.  28  to  31    are conceptual bottom views illustrating an embodiment of a mounting pattern of a board, on which the board connector according to the second embodiment is mounted. 
     
    
    
     DETAILED DESCRIPTION 
     Hereinafter, embodiments of a board connector according to the present disclosure will be described in detail with reference to the accompanying drawings.  FIGS.  8  and  9    illustrate a state in which a connector according to a first embodiment is reversed in a direction shown in  FIGS.  2  and  3    and coupled to a connector according to a second embodiment. 
     Referring to  FIG.  2   , a board connector  1  according to the present disclosure may be installed in an electronic device (not shown) such as a mobile phone, a computer, a tablet computer, or the like. The board connector  1  according to the present disclosure may be used to electrically connect a plurality of boards (not shown). The boards may be printed circuit boards (PCBs). For example, when a first board and a second board are electrically connected, a receptacle connector mounted on the first board and a plug connector mounted on the second board may be connected to each other. Accordingly, the first board and the second board may be electrically connected to each other through the receptacle connector and the plug connector. A plug connector mounted on the first board and a receptacle connector mounted on the second board may also be connected to each other. 
     The board connector  1  according to the present disclosure may be realized as the receptacle connector. The board connector  1  according to the present disclosure may be realized as the plug connector. The board connector  1  according to the present disclosure may also be realized by including both the receptacle connector and the plug connector. Hereinafter, the board connector according to an embodiment in which the board connector  1  according to the present disclosure is realized as the plug connector is defined as a board connector  200  according to the first embodiment, and the board connector according to an embodiment in which the board connector  1  according to the present disclosure is realized as the receptacle connector is defined as a board connector  300  according to the second embodiment, and these will be described in detail with reference to the accompanying drawings. In addition, descriptions will be made on the basis of an embodiment in which the board connector  200  according to the first embodiment is mounted on the first board and the board connector  300  according to the second embodiment is mounted on the second board. It should be apparent to those skilled in the art to which the present disclosure belongs to derive an embodiment, in which the board connector  1  according to the present disclosure includes both the receptacle connector and the plug connector, therefrom. 
     &lt;Board Connector  200  According to First Embodiment&gt; 
     Referring to  FIGS.  2  to  4   , the board connector  200  according to the first embodiment may include a plurality of radio frequency (RF) contacts  210 , a plurality of transmit contacts  220 , a ground housing  230 , and an insulation unit  240 . 
     The RF contacts  210  are for transmitting RF signals. The RF contacts  210  may transmit ultra-high frequency RF signals. The RF contacts  210  may be supported by the insulation unit  240 . The RF contacts  210  may be coupled to the insulation unit  240  through an assembly process. The RF contacts  210  may also be integrally molded with the insulation unit  240  through injection molding. 
     The RF contacts  210  may be disposed to be spaced apart from each other. The RF contacts  210  may be electrically connected to the first board by being mounted on the first board. The RF contacts  210  may be electrically connected to the second board, on which a mating connector is mounted, by being connected to RF contacts included in the mating connector. Accordingly, the first board and the second board may be electrically connected. When the board connector  200  according to the first embodiment is a plug connector, the mating connector may be a receptacle connector. When the board connector  200  according to the first embodiment is a receptacle connector, the mating connector may be a plug connector. 
     A first RF contact  211  among the RF contacts  210  and a second RF contact  212  among the RF contacts  210  may be spaced apart from each other along a first axial direction (X-axis direction). The first RF contact  211  and the second RF contact  212  may be supported by the insulation unit  240  at locations spaced apart from each other along the first axial direction (X-axis direction). 
     The first RF contact  211  may include a first RF mounting member  2111 . The first RF mounting member  2111  may be mounted on the first board. Accordingly, the first RF contact  211  may be electrically connected to the first board through the first RF mounting member  2111 . The first RF contact  211  may be formed of an electrically conductive material. For example, the first RF contact  211  may be formed of metal. The first RF contact  211  may be connected to any one of the RF contacts included in the mating connector. 
     The second RF contact  212  may include a second RF mounting member  2121 . The second RF mounting member  2121  may be mounted on the first board. Accordingly, the second RF contact  212  may be electrically connected to the first board through the second RF mounting member  2121 . The second RF contact  212  may be formed of an electrically conductive material. For example, the second RF contact  212  may be formed of metal. The second RF contact  212  may be connected to any one of the RF contacts included in the mating connector. 
     Referring to  FIGS.  2  to  4   , the transmit contacts  220  are coupled to the insulation unit  240 . The transmit contacts  220  may serve to transmit signals, data, and the like. The transmit contacts  220  may be coupled to the insulation unit  240  through an assembly process. The transmit contacts  220  may also be integrally molded with the insulation unit  240  through injection molding. 
     The transmit contacts  220  may be disposed between the first RF contact  211  and the second RF contact  212  with respect to the first axial direction (X-axis direction). Accordingly, in order to reduce RF signal interference between the first RF contact  211  and the second RF contact  212 , the transmit contacts  220  may be disposed in a space in which the first RF contact  211  and the second RF contact  212  are spaced apart. Accordingly, the board connector  200  according to the first embodiment may not only reduce RF signal interference by increasing a distance by which the first RF contact  211  and the second RF contact  212  are spaced apart from each other, but also improve space utilization for the insulation unit  240  by disposing the transmit contacts  220  in a separation space for this purpose. 
     The transmit contacts  220  may be disposed to be spaced apart from each other. The transmit contacts  220  may be electrically connected to the first board by being mounted on the first board. In this case, a transmission mounting member  2201  included in each of the transmit contacts  220  may be mounted on the first board. The transmit contacts  220  may be formed of an electrically conductive material. For example, the transmit contacts  220  may be formed of metal. The transmit contacts  220  may be electrically connected to the second board, on which the mating connector is mounted, by being connected to transmit contacts included in the mating connector. Accordingly, the first board and the second board may be electrically connected. 
     Meanwhile, in  FIG.  4   , the board connector  200  according to the first embodiment is illustrated as including four transmit contacts  220 , but the present disclosure is not limited thereto, and the board connector  200  according to the first embodiment may also include five or more transmit contacts  220 . The transmit contacts  220  may be spaced apart from each other along the first axial direction (X-axis direction) and a second axial direction (Y-axis direction). The first axial direction (X-axis direction) and the second axial direction (Y-axis direction) are axis directions perpendicular to each other. 
     Referring to  FIGS.  2  to  4   , the ground housing  230  is coupled to the insulation unit  240 . The ground housing  230  may be grounded by being mounted on the first board. Accordingly, the ground housing  230  may realize a shielding function against signals, electromagnetic waves, or the like for the RF contacts  210 . In this case, the ground housing  230  may prevent electromagnetic waves generated from the RF contacts  210  from interfering with signals of circuit components located around the electronic device, and may prevent electromagnetic waves generated from the circuit components located around the electronic device from interfering with RF signals transmitted by the RF contacts  210 . Accordingly, the board connector  200  according to the first embodiment may contribute to improving electromagnetic interference (EMI) shielding performance and electromagnetic compatibility (EMC) performance using the ground housing  230 . The ground housing  230  may be formed of an electrically conductive material. For example, the ground housing  230  may be formed of metal. 
     The ground housing  230  may be disposed to surround sides of an inner side space  230   a . A portion of the insulation unit  240  may be located in the inner side space  230   a . All of the first RF contact  211 , the second RF contact  212 , and the transmit contacts  220  may be located in the inner side space  230   a . In this case, all of the first RF mounting member  2111 , the second RF mounting member  2121 , and the transmission mounting member  2201  may also be located in the inner side space  230   a . Accordingly, the ground housing  230  may enhance a shielding function for the first RF contact  211  and the second RF contact  212  by realizing shielding walls for all of the first RF contact  211  and the second RF contact  212 , thereby realizing complete shielding. The mating connector may be inserted into the inner side space  230   a.    
     The ground housing  230  may be disposed to surround all sides of the inner side space  230   a . The inner side space  230   a  may be disposed inside the ground housing  230 . When the entire ground housing  230  is formed in a rectangular loop shape, the inner side space  230   a  may be formed in a rectangular parallelepiped shape. In this case, the ground housing  230  may be disposed to surround four sides of the inner side space  230   a.    
     The ground housing  230  may be integrally formed as one piece without a seam. The ground housing  230  may be integrally formed as one piece without a seam by a metal injection method, such as a metal die casting method, a metal injection molding (MIM) method, or the like. The ground housing  230  may be integrally formed as one piece without a seam by a computer numerical control (CNC) process, a machining center tool (MCT) process, or the like. 
     Referring to  FIGS.  2  to  4   , the insulation unit  240  supports the RF contacts  210 . The RF contacts  210  and the transmit contacts  220  may be coupled to the insulation unit  240 . The insulation unit  240  may be formed of an insulating material. The insulation unit  240  may be coupled to the ground housing  230  such that the RF contacts  210  are located in the inner side space  230   a.    
     Referring to  FIGS.  2  to  4   , the board connector  200  according to the first embodiment may include a first ground contact  250 . 
     The first ground contact  250  is coupled to the insulation unit  240 . The first ground contact  250  may be grounded by being mounted on the first board. The first ground contact  250  may be coupled to the insulation unit  240  through an assembly process. The first ground contact  250  may also be integrally molded with the insulation unit  240  through injection molding. 
     The first ground contact  250  may realize a shielding function for the first RF contact  211  together with the ground housing  230 . In this case, the first ground contact  250  may be disposed between the first RF contact  211  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). The first ground contact  250  may be formed of an electrically conductive material. For example, the first ground contact  250  may be formed of metal. When the mating connector is inserted into the inner side space  230   a , the first ground contact  250  may be connected to a ground contact included in the mating connector. 
     Referring to  FIGS.  2  to  4   , the board connector  200  according to the first embodiment may include a second ground contact  260 . 
     The second ground contact  260  is coupled to the insulation unit  240 . The second ground contact  260  may be grounded by being mounted on the first board. The second ground contact  260  may be coupled to the insulation unit  240  through an assembly process. The second ground contact  260  may also be integrally molded with the insulation unit  240  through injection molding. 
     The second ground contact  260  may realize a shielding function for the second RF contact  212  together with the ground housing  230 . The second ground contact  260  may be disposed between the transmit contacts  220  and the second RF contact  212  with respect to the first axial direction (X-axis direction). The second ground contact  260  may be formed of an electrically conductive material. For example, the second ground contact  260  may be formed of metal. When the mating connector is inserted into the inner side space  230   a , the second ground contact  260  may be connected to the ground contact included in the mating connector. 
     Here, the board connector  200  according to the first embodiment may be realized to include a plurality of first RF contacts  211  and a plurality of second RF contacts  212 . 
     Referring to  FIGS.  2  to  9   , the first RF contacts  211  and the second RF contacts  212  may be disposed to be spaced apart from each other along the first axial direction (X-axis direction). The transmit contacts  220  may be disposed between the first RF contacts  211  and the second RF contacts  212  with respect to the first axial direction (X-axis direction). In this case, the first ground contact  250  may shield between the first RF contacts  211  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). The second ground contact  260  may shield between the second RF contacts  212  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). 
     When the plurality of first RF contacts  211  are provided, the first ground contact  250  may shield between the first RF contacts  211  and the transmit contacts  220  with respect to the first axial direction (X-axis direction), and also, shield between the first RF contacts  211  with respect to the second axial direction (Y-axis direction). Accordingly, by using the first ground contact  250 , the board connector  200  according to the first embodiment may realize a shielding function for between the first RF contacts  211  and the transmit contacts  220  and also, additionally realize a shielding function for between the first RF contacts  211 . Accordingly, the board connector  200  according to the first embodiment may be realized to transmit a wider variety of RF signals using the first RF contacts  211 , thereby improving versatility applicable to a wider variety of electronic products. 
     A first-first RF contact  211   a  among the first RF contacts  211  and a first-second RF contact  211   b  among the first RF contacts  211  may be coupled to the insulation unit  240  so as to be spaced apart from each other along the second axial direction (Y-axis direction). In  FIG.  5   , the board connector  200  according to the first embodiment is illustrated as including two first RF contacts  211  realized as the first-first RF contact  211   a  and the first-second RF contact  211   b , but the present disclosure is not limited thereto, and the board connector  200  according to the first embodiment may also include three or more first RF contacts  211 . Meanwhile, in the present specification, descriptions will be made on the basis of the case in which the board connector  200  according to the first embodiment includes the first-first RF contact  211   a  and the first-second RF contact  211   b.    
     When the first-first RF contact  211   a  and the first-second RF contact  211   b  are provided, the first ground contact  250  may include a first-first ground contact  251  and a first-second ground contact  252 . 
     The first-first ground contact  251  may be located between the first-first RF contact  211   a  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). Accordingly, the first-first ground contact  251  may shield between the first-first RF contact  211   a  and the transmit contacts  220 . 
     The first-first ground contact  251  may include a first-first shield member  2511 . 
     The first-first shield member  2511  may be located between the first-first RF contact  211   a  and the first-second RF contact  211   b  with respect to the second axial direction (Y-axis direction). Accordingly, the first-first ground contact  251  may shield between the first-first RF contact  211   a  and the first-second RF contact  211   b  using the first-first shield member  2511 . Accordingly, even though the first-first RF contact  211   a  and the first-second RF contact  211   b  transmit different RF signals, the board connector  200  according to the first embodiment may prevent signals or the like from being interfered between the first-first RF contact  211   a  and the first-second RF contact  211   b  using the first-first shield member  2511 . Accordingly, the board connector  200  according to the first embodiment may be realized to stably transmit a wider variety of RF signals using the first-first RF contact  211   a  and the first-second RF contact  211   b . The first-first shield member  2511  may be formed in a plate shape disposed in a vertical direction between the first-first RF contact  211   a  and the first-second RF contact  211   b.    
     The first-first shield member  2511  may be disposed to be spaced apart from each of the first-first RF contact  211   a  and the first-second RF contact  211   b  with respect to the second axial direction (Y-axis direction) by the same distance. Accordingly, in the board connector  200  according to the first embodiment, a deviation between shielding performance for the first-first RF contact  211   a  and shielding performance for the first-second RF contact  211   b  may be reduced. Accordingly, the board connector  200  according to the first embodiment may stably realize a shielding function for each of the first-first RF contact  211   a  and the first-second RF contact  211   b  using the first-first shield member  2511 . 
     The first-first ground contact  251  may include a first-first shield protrusion  2512 . 
     The first-first shield protrusion  2512  protrudes from the first-first shield member  2511 . The first-first shield protrusion  2512  may be connected to the ground housing  230 . Accordingly, the first ground contact  250  may enhance shielding performance between the first-first RF contact  211   a  and the first-second RF contact  211   b  by being electrically connected to the ground housing  230  through the first-first shield protrusion  2512 , thereby realizing complete shielding. The first-first shield protrusion  2512  may be formed in a plate shape disposed in the vertical direction. 
     The first-first ground contact  251  may include a first-first ground connection member  2513  and a first-first ground mounting member  2514 . 
     The first-first ground connection member  2513  is coupled to each of the first-first shield member  2511  and the first-first ground mounting member  2514 . The first-first shield member  2511  and the first-first ground mounting member  2514  may be connected to each other through the first-first ground connection member  2513 . The first-first ground connection member  2513  may be connected to the ground contact included in the mating connector. Accordingly, the first ground contact  250  may be electrically connected to the ground contact included in the mating connector by being connected to the ground contact included in the mating connector through the first-first ground connection member  2513 . Accordingly, a gap generated as the first-first ground contact  251  and the first-second ground contact  252  are disposed to be spaced apart from each other along the second axial direction (Y-axis direction) may be shielded as the first ground contact  250  is connected to the ground contact included in the mating connector through the first-first ground connection member  2513 . The first-first shield member  2511  may be coupled to the first-first ground connection member  2513 . The first-first shield member  2511  may protrude from the first-first ground connection member  2513  along the first axial direction (X-axis direction). In this case, the first-first shield protrusion  2512  may protrude from the first-first shield member  2511  along the first axial direction (X-axis direction). 
     The first-first ground mounting member  2514  is mounted on the first board. The first-first ground mounting member  2514  may be grounded by being mounted on the first board. Accordingly, the first-first ground contact  251  may be grounded to the first board through the first-first ground mounting member  2514 . The first-first ground mounting member  2514  may protrude from the first-first ground connection member  2513  along the second axial direction (Y-axis direction). In this case, the first-first ground mounting member  2514  may be disposed between the first-first RF contact  211   a  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). The first-first ground mounting member  2514  may protrude from the first-first ground connection member  2513  by a length connectable to the ground housing  230  with respect to the second axial direction (Y-axis direction). In this case, the first-first ground mounting member  2514  and the first-first shield member  2511  protrude from the first-first ground connection member  2513  in different directions to be connected to different sidewalls included in the ground housing  230 . Accordingly, since the first-first ground contact  251  and the ground housing  230  are electrically connected to each other while surrounding all sides of the first-first RF contact  211   a , the board connector  200  according to the first embodiment may further enhance the shielding performance for the first-first RF contact  211   a , thereby realizing complete shielding. The first-first ground mounting member  2514  may be formed in a plate shape disposed in a horizontal direction. 
     The first-first ground contact  251  may include a first-first ground protrusion  2515 . 
     The first-first ground protrusion  2515  protrudes from the first-first shield member  2511 . The first-first ground protrusion  2515  may be mounted on the first board. Accordingly, a mounting area in which the first-first ground contact  251  is mounted on the first board may be increased, so that the board connector  200  according to the first embodiment may further enhance the shielding performance using the first-first ground contact  251 . The first-first ground protrusion  2515  may be mounted on the first board by passing through the insulation unit  240  and protruding from the insulation unit  240 . The first-first ground protrusion  2515  may protrude from the first-first shield member  2511  along the vertical direction. The first-first ground protrusion  2515  may be formed in a plate shape disposed in the vertical direction. 
     The first-first ground contact  251  may include a first-first connection protrusion  2516 . 
     The first-first connection protrusion  2516  protrudes from the first-first shield member  2511 . The first-first connection protrusion  2516  may be connected to a ground housing of the mating connector. Accordingly, a connection area in which the first-first ground contact  251  is connected to the ground housing of the mating connector may be increased, so that the board connector  200  according to the first embodiment may further enhance the shielding performance using the first-first ground contact  251 . The first-first connection protrusion  2516  may be connected to the ground housing of the mating connector by passing through the insulation unit  240  and protruding from the insulation unit  240 . The first-first connection protrusion  2516  may be inserted into an insulation unit included in the mating connector to be connected to the ground housing included in the mating connector. In this case, a through hole into which the first-first connection protrusion  2516  is inserted may be formed in the insulation unit included in the mating connector. The first-first connection protrusion  2516  may protrude from the first-first shield member  2511  along the vertical direction. The first-first connection protrusion  2516  and the first-first ground protrusion  2515  may protrude from the first-first shield member  2511  in directions opposite to each other with respect to the vertical direction. The first-first connection protrusion  2516  may be formed in a plate shape disposed in the vertical direction. 
     The first-second ground contact  252  may be located between the first-second RF contact  211   b  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). Accordingly, the first-second ground contact  252  may shield between the first-second RF contact  211   b  and the transmit contacts  220 . The first-second ground contact  252  may be disposed to be spaced apart from the first-first ground contact  251  with respect to the second axial direction (Y-axis direction). The first-second ground contact  252  and the first-first ground contact  251  may be formed in different shapes. For example, the first-second ground contact  252  may be formed in a shape that does not have the first-first shield member  2511 , the first-first shield protrusion  2512 , the first-first ground protrusion  2515 , and the first-first connection protrusion  2516 , which are included in the first-first ground contact  251 . Accordingly, when compared with an embodiment in which the first-second ground contact  252  is formed in the same shape as the first-first ground contact  251 , in the board connector  200  according to the first embodiment, not only the easiness of a manufacturing operation may be improved in manufacturing the first-second ground contact  252 , but also material costs for manufacturing the first-second ground contact  252  may be reduced. In this case, shielding between the first-first RF contact  211   a  and the first-second RF contact  211   b  may be performed by the first-first ground contact  251 . 
     The first-second ground contact  252  may include a first-second ground connection member  2521  and a first-second ground mounting member  2522 . 
     The first-second ground connection member  2521  is provided to be connected to the ground contact included in the mating connector. Accordingly, the first ground contact  250  may be electrically connected to the ground contact included in the mating connector by being connected to the ground contact included in the mating connector through the first-second ground connection member  2521 . Accordingly, the gap generated as the first-second ground contact  252  and the first-first ground contact  251  are disposed to be spaced apart from each other along the second axial direction (Y-axis direction) may be shielded as the first ground contact  250  is connected to the ground contact included in the mating connector through the first-second ground connection member  2521 . In this case, both the first-second ground connection member  2521  and the first-first ground connection member  2513  may be connected to the ground contact included in the mating connector. 
     The first-second ground mounting member  2522  is mounted on the first board. The first-second ground mounting member  2522  may be grounded by being mounted on the first board. Accordingly, the first-second ground contact  252  may be grounded to the first board through the first-second ground mounting member  2522 . The first-second ground mounting member  2522  may protrude from the first-second ground connection member  2521  along the second axial direction (Y-axis direction). In this case, the first-second ground mounting member  2522  may be disposed between the first-second RF contact  211   b  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). The first-second ground mounting member  2522  may protrude from the first-second ground connection member  2521  by a length connectable to the ground housing  230  with respect to the second axial direction (Y-axis direction). In this case, the first-second ground mounting member  2522  and the first-first ground mounting member  2514  may protrude in opposite directions to be respectively connected to the sidewalls of the ground housing  230  facing each other. Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding performance between the first RF contacts  211  and the transmit contact  220 . The first-second ground mounting member  2522  may be formed in a plate shape disposed in the horizontal direction. 
     As described above, in the board connector  200  according to the first embodiment, a first ground loop  250   a  (illustrated in  FIG.  5   ) for the first-first RF contact  211   a  and the first-second RF contact  211   b  may be realized using the first-first ground contact  251 , the first-second ground contact  252 , and the ground housing  230 . Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding performance for the first-first RF contact  211   a  and the first-second RF contact  211   b  using the first ground loop  250   a , thereby realizing complete shielding for the first-first RF contact  211   a  and the first-second RF contact  211   b.    
     Referring to  FIGS.  2  to  9   , when the plurality of second RF contacts  212  are provided, the second ground contact  260  may shield between the second RF contacts  212  and the transmit contacts  220  with respect to the first axial direction (X-axis direction), and also, shield between the second RF contacts  212  with respect to the second axial direction (Y-axis direction). Accordingly, by using the second ground contact  260 , the board connector  200  according to the first embodiment may realize a shielding function for between the second RF contacts  212  and the transmit contacts  220 , and also, additionally realize a shielding function for between the second RF contacts  212 . Accordingly, the board connector  200  according to the first embodiment may be realized to transmit a wider variety of RF signals using the second RF contacts  212 , thereby improving versatility applicable to a wider variety of electronic products. 
     A second-first RF contact  212   a  among the second RF contacts  212  and a second-second RF contact  212   b  among the second RF contacts  212  may be coupled to the insulation unit  240  so as to be spaced apart from each other along the second axial direction (Y-axis direction). In  FIG.  5   , the board connector  200  according to the first embodiment is illustrated as including two second RF contacts  212  realized as the second-first RF contact  212   a  and the second-second RF contact  212   b , but the present disclosure is not limited thereto, and the board connector  200  according to the first embodiment may also include three or more second RF contacts  212 . Meanwhile, in the present specification, descriptions will be made on the basis of the case in which the board connector  200  according to the first embodiment includes the second-first RF contact  212   a  and the second-second RF contact  212   b.    
     When the second-first RF contact  212   a  and the second-second RF contact  212   b  are provided, the second ground contact  260  may include a second-first ground contact  261  and a second-second ground contact  262 . 
     The second-first ground contact  261  may be located between the second-first RF contact  212   a  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). Accordingly, the second-first ground contact  261  may shield between the second-first RF contact  212   a  and the transmit contacts  220 . 
     The second-first ground contact  261  may include a second-first shield member  2611 . 
     The second-first shield member  2611  may be located between the second-first RF contact  212   a  and the second-second RF contact  212   b  with respect to the second axial direction (Y-axis direction). Accordingly, the second-first ground contact  261  may shield between the second-first RF contact  212   a  and the second-second RF contact  212   b  using the second-first shield member  2611 . Accordingly, even though the second-first RF contact  212   a  and the second-second RF contact  212   b  transmit different RF signals, the board connector  200  according to the first embodiment may prevent signals or the like from being interfered between the second-first RF contact  212   a  and the second-second RF contact  212   b  using the second-first shield member  2611 . Accordingly, the board connector  200  according to the first embodiment is realized to stably transmit a wider variety of RF signals using the second-first RF contact  212   a  and the second-second RF contact  212   b . The second-first shield member  2611  may be formed in a plate shape disposed in the vertical direction between the second-first RF contact  212   a  and the second-second RF contact  212   b.    
     The second-first shield member  2611  may be disposed to be spaced apart from each of the second-first RF contact  212   a  and the second-second RF contact  212   b  with respect to the second axial direction (Y-axis direction) by the same distance. Accordingly, in the board connector  200  according to the first embodiment, a deviation between shielding performance for the second-first RF contact  212   a  and shielding performance for the second-second RF contact  212   b  may be reduced. Accordingly, the board connector  200  according to the first embodiment may stably realize a shielding function for each the second-first RF contact  212   a  and the second-second RF contact  212   b  using the second-first shield member  2611 . 
     The second-first ground contact  261  may include a second-first shield protrusion  2612 . 
     The second-first shield protrusion  2612  protrudes from the second-first shield member  2611 . The second-first shield protrusion  2612  may be connected to the ground housing  230 . Accordingly, the second ground contact  260  may enhance the shielding performance between the second-first RF contact  212   a  and the second-second RF contact  212   b  by being electrically connected to the ground housing  230  through the second-first shield protrusion  2612 , thereby realizing complete shielding. The second-first shield protrusion  2612  may be formed in a plate shape disposed in the vertical direction. 
     The second-first ground contact  261  may include a second-first ground connection member  2613  and a second-first ground mounting member  2614 . 
     The second-first ground connection member  2613  is coupled to each of the second-first shield member  2611  and the second-first ground mounting member  2614 . The second-first shield member  2611  and the second-first ground mounting member  2614  may be connected to each other through the second-first ground connection member  2613 . The second-first ground connection member  2613  may be connected to the ground contact included in the mating connector. Accordingly, the second ground contact  260  may be electrically connected to the ground contact included in the mating connector by being connected to the ground contact included in the mating connector through the second-first ground connection member  2613 . Accordingly, a gap generated as the second-first ground contact  261  and the second-second ground contact  262  are disposed to be spaced apart from each other along the second axial direction (Y-axis direction) may be shielded as the second ground contact  260  is connected to the ground contact included in the mating connector through the second-first ground connection member  2613 . The second-first shield member  2611  may be coupled to the second-first ground connection member  2613 . The second-first shield member  2611  may protrude from the second-first ground connection member  2613  along the first axial direction (X-axis direction). In this case, the second-first shield protrusion  2612  may protrude from the second-first shield member  2611  along the first axial direction (X-axis direction). 
     The second-first ground mounting member  2614  is mounted on the first board. The second-first ground mounting member  2614  may be grounded by being mounted on the first board. Accordingly, the second-first ground contact  261  may be grounded to the first board through the second-first ground mounting member  2614 . The second-first ground mounting member  2614  may protrude from the second-first ground connection member  2613  along the second axial direction (Y-axis direction). In this case, the second-first ground mounting member  2614  may be disposed between the second-first RF contact  212   a  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). The second-first ground mounting member  2614  may protrude from the second-first ground connection member  2613  by a length connectable to the ground housing  230  with respect to the second axial direction (Y-axis direction). In this case, the second-first ground mounting member  2614  and the second-first shield member  2611  protrude in different directions from the second-first ground connection member  2613  to be connected to different sidewalls included in the ground housing  230 . Accordingly, since the second-first ground contact  261  and the ground housing  230  are electrically connected to each other while surrounding all sides of the second-first RF contact  212   a , the board connector  200  according to the first embodiment may further enhance the shielding performance for the second-first RF contact  212   a , thereby realizing complete shielding. The second-first ground mounting member  2614  may be formed in a plate shape disposed in the horizontal direction. 
     The second-first ground contact  261  may include a second-first ground protrusion  2615 . 
     The second-first ground protrusion  2615  protrudes from the second-first shield member  2611 . The second-first ground protrusion  2615  may be mounted on the first board. Accordingly, a mounting area in which the second-first ground contact  261  is mounted on the first board may be increased, so that the board connector  200  according to the first embodiment may further enhance the shielding performance using the second-first ground contact  261 . The second-first ground protrusion  2615  may be mounted on the first board by passing through the insulation unit  240  and protruding from the insulation unit  240 . The second-first ground protrusion  2615  may protrude from the second-first shield member  2611  along the vertical direction. The second-first ground protrusion  2615  may be formed in a plate shape disposed in the vertical direction. 
     The second-first ground contact  261  may include a second-first connection protrusion  2616 . 
     The second-first connection protrusion  2616  protrudes from the second-first shield member  2611 . The second-first connection protrusion  2616  may be connected to the ground housing of the mating connector. Accordingly, a connection area in which the second-first ground contact  261  is connected to the ground housing of the mating connector may be increased, so that the board connector  200  according to the first embodiment may further enhance the shielding performance using the second-first ground contact  261 . The second-first connection protrusion  2616  may be connected to the ground housing of the mating connector by passing through the insulation unit  240  and protruding from the insulation unit  240 . The second-first connection protrusion  2616  may be inserted into the insulation unit included in the mating connector to be connected to the ground housing included in the mating connector. In this case, a through hole into which the second-first connection protrusion  2616  is inserted may be formed in the insulation unit included in the mating connector. The second-first connection protrusion  2616  may protrude from the second-first shield member  2611  along the vertical direction. The second-first connection protrusion  2616  and the second-first ground protrusion  2615  may protrude from the second-first shield member  2611  in directions opposite to each other with respect to the vertical direction. The second-first connection protrusion  2616  may be formed in a plate shape disposed in the vertical direction. 
     The second-second ground contact  262  may be located between the second-second RF contact  212   b  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). Accordingly, the second-second ground contact  262  may shield between the second-second RF contact  212   b  and the transmit contacts  220 . The second-second ground contact  262  may be disposed to be spaced apart from the second-first ground contact  261  with respect to the second axial direction (Y-axis direction). The second-second ground contact  262  and the second-first ground contact  261  may be formed in different shapes. For example, the second-second ground contact  262  may be formed in a shape that does not have the second-first shield member  2611 , the second-first shield protrusion  2612 , the second-first ground protrusion  2615 , and the second-first connection protrusion  2616 , which are included in the second-first ground contact  261 . Accordingly, when compared with an embodiment in which the second-second ground contact  262  is formed in the same shape as the second-first ground contact  261 , in the board connector  200  according to the first embodiment, not only the easiness of a manufacturing operation may be improved in manufacturing the second-second ground contact  262 , but also material costs for manufacturing the second-second ground contact  262  may be reduced. In this case, shielding between the second-first RF contact  212   a  and the second-second RF contact  212   b  may be performed by the second-first ground contact  261 . 
     The second-second ground contact  262  may include a second-second ground connection member  2621  and a second-second ground mounting member  2622 . 
     The second-second ground connection member  2621  is provided to be connected to the ground contact included in the mating connector. Accordingly, the second ground contact  260  may be electrically connected to the ground contact included in the mating connector by being connected to the ground contact included in the mating connector through the second-second ground connection member  2621 . Accordingly, the gap generated as the second-second ground contact  262  and the second-first ground contact  261  are disposed to be spaced apart from each other along the second axial direction (Y-axis direction) may be shielded as the second ground contact  260  is connected to the ground contact included in the mating connector through the second-second ground connection member  2621 . In this case, both the second-second ground connection member  2621  and the second-first ground connection member  2613  may be connected to the ground contact included in the mating connector. 
     The second-second ground mounting member  2622  is mounted on the first board. The second-second ground mounting member  2622  may be grounded by being mounted on the first board. Accordingly, the second-second ground contact  262  may be grounded to the first board through the second-second ground mounting member  2622 . The second-second ground mounting member  2622  may protrude from the second-second ground connection member  2621  along the second axial direction (Y-axis direction). In this case, the second-second ground mounting member  2622  may be disposed between the second-second RF contact  212   b  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). The second-second ground mounting member  2622  may protrude from the second-second ground connection member  2621  by a length connectable to the ground housing  230  with respect to the second axial direction (Y-axis direction). In this case, the second-second ground mounting member  2622  and the second-first ground mounting member  2614  may protrude in opposite directions to be respectively connected to the sidewalls of the ground housing  230  facing each other. Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding performance between the second RF contacts  212  and the transmit contact  220 . The second-second ground mounting member  2622  may be formed in a plate shape disposed in the horizontal direction. 
     As described above, in the board connector  200  according to the first embodiment, a second ground loop  260   a  (illustrated in  FIG.  5   ) for the second-first RF contact  212   a  and the second-second RF contact  212   b  may be realized using the second-first ground contact  261 , the second-second ground contact  262 , and the ground housing  230 . Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding performance for the second-first RF contact  212   a  and the second-second RF contact  212   b  using the second ground loop  260   a , thereby realizing complete shielding for the second-first RF contact  212   a  and the second-second RF contact  212   b.    
     Here, the second-first ground contact  261  and the first-first ground contact  251  may be formed in the same shape. The second-second ground contact  262  and the first-second ground contact  252  may be formed in the same shape. Accordingly, in the board connector  200  according to the first embodiment, the easiness of a manufacturing operation may be improved in manufacturing each of the second-first ground contact  261 , the first-first ground contact  251 , the second-second ground contact  262 , and the first-second ground contact  252 . 
     In this case, as shown in  FIG.  5   , the second-first ground contact  261  and the first-first ground contact  251  may be disposed to be point-symmetric with respect to a symmetry point SP. The symmetry point SP is a point spaced apart from each of both sidewalls  230   b  and  230   c  of the ground housing  230 , which are disposed to be spaced apart from each other with respect to the first axial direction (X-axis direction), by the same distance, and also, spaced apart from each of both sidewalls  230   d  and  230   e  of the ground housing  230 , which are disposed to be spaced apart from each other with respect to the second axial direction (Y-axis direction), by the same distance. Accordingly, in the board connector  200  according to the first embodiment, the second-first ground contact  261  and the first-first ground contact  251  are formed in the same shape as each other and realized differently only in arrangement directions, and thus the easiness of a manufacturing operation may be further improved in manufacturing the second-first ground contact  261  and the first-first ground contact  251 . As shown in  FIG.  5   , the second-second ground contact  262  and the first-second ground contact  252  may be disposed to be point-symmetric with respect to the symmetry point SP. Accordingly, in the board connector  200  according to the first embodiment, the second-second ground contact  262  and the first-second ground contact  252  are formed in the same shape and realized differently only in arrangement directions, and thus the easiness of a manufacturing operation may be further improved in manufacturing the second-second ground contact  262  and the first-second ground contact  252 . In this case, the second-first RF contact  212   a  and the first-first RF contact  211   a  may be disposed to be point-symmetric on the basis of the symmetry point SP. The second-second RF contact  212   b  and the first-second RF contact  211   b  may be disposed to be point-symmetric with respect to the symmetry point SP. 
     Referring to  FIGS.  2  to  10   , in the board connector  200  according to the first embodiment, the ground housing  230  may be realized as follows. 
     The ground housing  230  may include a ground inner wall  231 , a ground outer wall  232 , and a ground connection wall  233 . 
     The ground inner wall  231  faces the insulation unit  240 . The ground inner wall  231  may be disposed to face the inner side space  230   a . The first-first ground contact  251  and the second-first ground contact  261  may each be connected to the ground inner wall  231 . The ground inner wall  231  may include a first sub-ground inner wall  2311 , a second sub-ground inner wall  2312 , a third sub-ground inner wall  2313 , and a fourth sub-ground inner wall  2314 . 
     The first sub-ground inner wall  2311  and the second sub-ground inner wall  2312  may be disposed to face each other with respect to the first axial direction (X-axis direction). The third sub-ground inner wall  2313  and the fourth sub-ground inner wall  2314  may be disposed to face each other with respect to the second axial direction (Y-axis direction). The first sub-ground inner wall  2311 , the second sub-ground inner wall  2312 , the third sub-ground inner wall  2313 , and the fourth sub-ground inner wall  2314  may be coupled to the ground connection wall  233  at locations spaced apart from each other. Each of the first sub-ground inner wall  2311 , the second sub-ground inner wall  2312 , the third sub-ground inner wall  2313 , and the fourth sub-ground inner wall  2314  may elastically move with respect to a portion coupled to the ground connection wall  233  to press the insulation unit  240 . Accordingly, the board connector  200  according to the first embodiment may enhance a coupling force between the ground housing  230  and the insulation unit  240 . In addition, when the mating connector is inserted into the inner side space  230   a , each of the first sub-ground inner wall  2311 , the second sub-ground inner wall  2312 , the third sub-ground inner wall  2313 , and the fourth sub-ground inner wall  2314  may be pushed by the mating connector to more strongly press the insulation unit  240 , thereby further increasing the coupling force between the ground housing  230  and the insulation unit  240 . 
     The ground outer wall  232  is spaced apart from the ground inner wall  231 . The ground outer wall  232  may be disposed outside the ground inner wall  231 . The ground outer wall  232  may be disposed to surround all sides of the ground inner wall  231 . The ground outer wall  232  and the ground inner wall  231  may be realized as shielding walls surrounding the sides of the inner side space  230   a . The first RF contact  211  and the second RF contact  212  may be located in the inner side space  230   a  surrounded by the shielding walls. Accordingly, the ground housing  230  may realize a shielding function for the RF contacts  210  using the shielding walls. Accordingly, the board connector  200  according to the first embodiment may contribute to further improving the EMI shielding performance and the EMC performance using the shielding walls. 
     The ground outer wall  232  may be grounded by being mounted on the first board. In this case, the ground housing  230  may be grounded through the ground outer wall  232 . When one end of the ground outer wall  232  is coupled to the ground connection wall  233 , the other end of the ground outer wall  232  may be mounted on the first board. In this case, the ground outer wall  232  may be formed at a higher height than the ground inner wall  231 . 
     The ground outer wall  232  may be connected to the ground housing of the mating connector that is inserted into the inner side space  230   a . For example, as shown in  FIGS.  8  and  9   , the ground outer wall  232  may be connected to a ground housing  330  of the mating connector. As described above, the board connector  200  according to the first embodiment may further enhance the shielding function through the connection between the ground housing  230  and the ground housing of the mating connector. In addition, the board connector  200  according to the first embodiment may reduce electrical adverse effects such as crosstalk, which may be generated by mutual capacitance or induction between adjacent terminals due to the connection between the ground housing  230  and the ground housing of the mating connector. In this case, the board connector  200  according to the first embodiment may secure a path through which electromagnetic waves are introduced into at least one of the first board and the second board, thereby further enhancing the EMI shielding performance. 
     The ground connection wall  233  is coupled to each of the ground inner wall  231  and the ground outer wall  232 . The ground connection wall  233  may be disposed between the ground inner wall  231  and the ground outer wall  232 . The ground inner wall  231  and the ground outer wall  232  may be electrically connected to each other through the ground connection wall  233 . Accordingly, when the ground outer wall  232  is mounted on the first board and grounded, the ground connection wall  233  and the ground inner wall  231  may also be grounded, thereby realizing a shielding function. 
     The ground connection wall  233  may be coupled to one end of each of the ground outer wall  232  and the ground inner wall  231 . Based on  FIG.  10   , one end of the ground outer wall  232  may correspond to an upper end of the ground outer wall  232 , and one end of the ground inner wall  231  may correspond to an upper end of the ground inner wall  231 . The ground connection wall  233  may be formed in a plate shape disposed in the horizontal direction, and the ground outer wall  232  and the ground inner wall  231  may each be formed in a plate shape disposed in the vertical direction. The ground connection wall  233 , the ground outer wall  232 , and the ground inner wall  231  may be integrally formed. 
     The ground connection wall  233  may be connected to the ground housing of the mating connector that is inserted into the inner side space  230   a . Accordingly, since the ground outer wall  232  and the ground connection wall  233  are connected to the ground housing of the mating connector, the board connector  200  according to the first embodiment may further enhance the shielding function by increasing a contact area between the ground housing  230  and the ground housing of the mating connector. 
     Here, the ground housing  230  may realize a shielding function for the first RF contacts  211  together with the first ground contact  250 . The ground housing  230  may realize a shielding function for the second RF contacts  212  together with the second ground contact  260 . 
     In this case, as shown in  FIG.  5   , the ground housing  230  may include a first shielding wall  230   b , a second shielding wall  230   c , a third shielding wall  230   d , and a fourth shielding wall  230   e . Each of the first shielding wall  230   b , the second shielding wall  230   c , the third shielding wall  230   d , and the fourth shielding wall  230   e  may be realized by the ground inner wall  231 , the ground outer wall  232 , and the ground connection wall  233 . The first shielding wall  230   b  and the second shielding wall  230   c  are disposed to face each other with respect to the first axial direction (X-axis direction). The first RF contacts  211  and the second RF contacts  212  may be located between the first shielding wall  230   b  and the second shielding wall  230   c  with respect to the first axial direction (X-axis direction). The first RF contacts  211  may be located at locations each having a shorter separation distance from the first shielding wall  230   b  than a separation distance from the second shielding wall  230   c  with respect to the first axial direction (X-axis direction). The second RF contacts  212  may be located at locations each having a shorter separation distance from the second shielding wall  230   c  than a separation distance from the first shielding wall  230   b  with respect to the first axial direction (X-axis direction). The third shielding wall  230   d  and the fourth shielding wall  230   e  are disposed to face each other with respect to the second axial direction (Y-axis direction). The first RF contacts  211  and the second RF contacts  212  may be located between the third shielding wall  230   d  and the fourth shielding wall  230   e  with respect to the second axial direction (Y-axis direction). 
     The first ground contact  250  may be disposed between the first RF contacts  211  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). Accordingly, the first RF contacts  211  may be located between the first shielding wall  230   b  and the first ground contact  250  with respect to the first axial direction (X-axis direction), and may be located between the third shielding wall  230   d  and the fourth shielding wall  230   e  with respect to the second axial direction (Y-axis direction). Thus, the board connector  200  according to the first embodiment may enhance the shielding function for the first RF contacts  211  using the first ground contact  250 , the first shielding wall  230   b , the third shielding wall  230   d , and the fourth shielding wall  230   e . The first ground contact  250 , the first shielding wall  230   b , the third shielding wall  230   d , and the fourth shielding wall  230   e  are disposed at four sides of the first RF contacts  211  to realize a shielding force against RF signals. In this case, the first ground contact  250 , the first shielding wall  230   b , the third shielding wall  230   d , and the fourth shielding wall  230   e  may realize the first ground loop  250   a  (illustrated in  FIG.  5   ) for the first RF contacts  211 . Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding function for the first RF contacts  211  using the first ground loop  250   a , thereby realizing complete shielding for the first RF contacts  211 . In this case, the first RF contacts  211  may be located between the first sub-ground inner wall  2311  and the first ground contact  250  with respect to the first axial direction (X-axis direction), and also, located between the third sub-ground inner wall  2313  and the fourth sub-ground inner wall  2314  with respect to the second axial direction (Y-axis direction). 
     The second ground contact  260  may be disposed between the second RF contacts  212  and the transmit contacts  220  with respect to the first axial direction (X-axis direction). Accordingly, the second RF contacts  212  may be located between the second shielding wall  230   c  and the second ground contact  260  with respect to the first axial direction (X-axis direction) and may be located between the third shielding wall  230   d  and the fourth shielding wall  230   e  with respect to the second axial direction (Y-axis direction). Accordingly, the board connector  200  according to the first embodiment may enhance the shielding function for the second RF contacts  212  using the second ground contact  260 , the second shielding wall  230   c , the third shielding wall  230   d , and the fourth shielding wall  230   e . The second ground contact  260 , the second shielding wall  230   c , the third shielding wall  230   d , and the fourth shielding wall  230   e  are disposed at four sides of the second RF contacts  212  to realize a shielding force against the RF signal. In this case, the second ground contact  260 , the second shielding wall  230   c , the third shielding wall  230   d , and the fourth shielding wall  230   e  may realize the second ground loop  260   a  (illustrated in  FIG.  5   ) for the second RF contacts  212 . Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding function for the second RF contacts  212  using the second ground loop  260   a , thereby realizing complete shielding for the second RF contacts  212 . In this case, the second RF contacts  212  may be located between the second sub-ground inner wall  2312  and the second ground contact  260  with respect to the first axial direction (X-axis direction), and also, located between the third sub-ground inner wall  2313  and the fourth sub-ground inner wall  2314  with respect to the second axial direction (Y-axis direction). 
     The ground housing  230  may include a wedge member  234  (illustrated in  FIG.  10   ). 
     The wedge member  234  protrudes from the ground inner wall  231 . When the ground housing  230  is coupled to the insulation unit  240 , the wedge member  234  may be wedged in the insulation unit  240  to fix the ground housing  230  and the insulation unit  240 . Accordingly, the board connector  200  according to the first embodiment may more firmly couple the ground housing  230  and the insulation unit  240  using the wedge member  234 . The wedge member  234  and the ground inner wall  231  may be integrally formed. 
     The wedge member  234  may include a first wedge member  234   a  (illustrated in  FIG.  8   ) and a second wedge member  234   b  (illustrated in  FIG.  8   ). 
     The first wedge member  234   a  protrudes from the first sub-ground inner wall  2311 . When the ground housing  230  is coupled to the insulation unit  240 , the first wedge member  234   a  may be wedged in the insulation unit  240  by being inserted into the insulation unit  240 , thereby fixing the ground housing  230  and the insulation unit  240 . The first-first ground contact  251  may be connected to the first wedge member  234   a . In this case, the first-first shield protrusion  2512  may be electrically connected to the ground housing  230  by being connected to the first wedge member  234   a . Accordingly, the first wedge member  234   a  may enhance the coupling force between the ground housing  230  and the insulation unit  240 , and simultaneously, enhance the shielding performance between the first-first RF contact  211   a  and the first-second RF contact  211   b.    
     The second wedge member  234   b  protrudes from the second sub-ground inner wall  2312 . When the ground housing  230  is coupled to the insulation unit  240 , the second wedge member  234   b  may be wedged in the insulation unit  240  by being inserted into the insulation unit  240 , thereby fixing the ground housing  230  and the insulation unit  240 . The second wedge member  234   b  and the first wedge member  234   a  may be disposed to face each other with respect to the first axial direction (X-axis direction). The second wedge member  234   b  may be connected to the second-first ground contact  261 . In this case, the second-first shield protrusion  2612  may be electrically connected to the ground housing  230  by being connected to the second wedge member  234   b . Accordingly, the second wedge member  234   b  may enhance the coupling force between the ground housing  230  and the insulation unit  240 , and simultaneously, enhance the shielding performance between the second-first RF contact  212   a  and the second-second RF contact  212   b.    
     Referring to  FIGS.  2  to  14   , the ground housing  230  may include the following configuration in order to further enhance the shielding function by improving a contact between the ground inner wall  231  and the ground housing of the mating connector. 
     First, as shown in  FIG.  11   , the ground housing  230  may include a connection groove  235 . The connection groove  235  may be formed on an outer surface of the ground outer wall  232 . The outer surface of the ground outer wall  232  is a surface facing a side opposite to the inner side space  230   a . The connection groove  235  may be realized as a groove formed to a predetermined depth in the outer surface of the ground outer wall  232 . The ground housing  330  included in the mating connector may be inserted into the connection groove  235 . In this case, a connection protrusion  336  included in the ground housing  330  of the mating connector may be inserted into the connection groove  235 . Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding function for the first RF contact  211  and the second RF contact  212  by improving a contact between the ground housing  230  and the ground housing  330  included in the mating connector using the connection groove  235 . In  FIG.  11   , the connection groove  235  is illustrated as being formed to have a longer length than the connection protrusion  336  with respect to the vertical direction, but the present disclosure is not limited thereto, and the connection groove  235  and the connection protrusion  336  may be formed to have lengths substantially equal to each other. Meanwhile, the ground outer wall  232  may support the connection protrusion  336  that is inserted into the connection groove  235 , so that the connection protrusion  336  is prevented from being separated from the connection groove  235 . The ground housing  230  may also include a plurality of connection grooves  235 . In this case, the connection grooves  235  may be disposed to be spaced apart from each other along the outer surface of the ground outer wall  232 . 
     Next, as shown in  FIG.  12   , the ground housing  230  may also include a connection protrusion  236 . The connection protrusion  236  may be formed on the outer surface of the ground outer wall  232 . The connection protrusion  236  may protrude from the outer surface of the ground outer wall  232 . The connection protrusion  236  may be inserted into the ground housing  330  included in the mating connector. In this case, the connection protrusion  236  may be inserted into a connection groove  337  included in the ground housing  330  of the mating connector. Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding function for the first RF contact  211  and the second RF contact  212  by improving the contact between the ground housing  230  and the ground housing  330  included in the mating connector using the connection protrusion  236 . In  FIG.  12   , the connection protrusion  236  is illustrated as being formed to have a shorter length than the connection groove  337  with respect to the vertical direction, but the present disclosure is not limited thereto, and the connection protrusion  236  and the connection groove  337  may be formed to have lengths substantially equal to each other. Meanwhile, the connection protrusion  236  is inserted into the connection groove  337  to be supported by the ground housing  330 , so that the connection protrusion  236  may be prevented from being separated from the connection groove  337 . The ground housing  230  may also include a plurality of connection protrusions  236 . In this case, the connection protrusions  236  may be disposed to be spaced apart from each other along the outer surface of the ground outer wall  232 . 
     Next, as shown in  FIG.  13   , when the ground housing  230  includes the connection protrusion  236 , the connection protrusion  236  may be supported by the connection protrusion  336  included in the ground housing  330  of the mating connector. Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding function for the first RF contact  211  and the second RF contact  212  by improving the contact between the ground housing  230  and the ground housing  330  included in the mating connector using the connection protrusion  236 . Meanwhile, the connection protrusion  236  may be disposed on a lower side of the connection protrusion  336  to be supported by the connection protrusion  336 , so that the connection protrusion  236  may also be prevented from being separated from the connection protrusion  336 . 
     Next, as shown in  FIG.  8   , the ground housing  230  may be in contact with the ground housing  330  of the mating connector as the outer surface of the ground outer wall  232  is brought into surface contact with the ground housing  330  of the mating connector. In this case, a gap may occur between the outer surface of the ground outer wall  232  and the ground housing  330  of the mating connector, and in order to compensate for the gap, as shown in  FIG.  14   , the ground housing  230  may include a conductive member  237 . The conductive member  237  may be coupled to the outer surface of the ground outer wall  232 . The conductive member  237  may extend along the outer surface of the ground outer wall  232 , including a corner portion  232   a  (illustrated in  FIG.  10   ) included in the outer surface of the ground outer wall  232 , to form a closed loop shape. Accordingly, the board connector  200  according to the first embodiment may further enhance the shielding function for the first RF contact  211  and the second RF contact  212  by improving the contact between the ground housing  230  and the ground housing  330  included in the mating connector using the conductive member  237 . In addition, in the case of the embodiment using the connection protrusion  236  and the connection groove  235 , it is difficult to realize the connection protrusion  236  and the connection groove  235  at the corner portion  232   a  included in the outer surface of the ground outer wall  232 , but in the case of the embodiment using the conductive member  237 , it is possible to improve the easiness of the operation of realizing the conductive member  237  at the corner portion  232   a  included in the outer surface of the ground outer wall  232 . The conductive member  237  may be formed of an electrically conductive material to electrically connect the ground outer wall  232  and the ground housing  330  of the mating connector. For example, the conductive member  237  may be formed of metal. After the conductive member  237  is separately manufactured, the conductive member  237  may be coupled to the ground outer wall  232  by being mounted, attached, fastened, and the like to the outer surface of the ground outer wall  232 . The conductive member  237  may also be coupled to the ground outer wall  232  by applying a conductive shielding material to the outer surface of the ground outer wall  232 . 
     Referring to  FIG.  15   , the ground housing  230  may be realized as double shielding walls. In this case, the ground inner wall  231  may be disposed to surround all sides of the inner side space  230   a . Accordingly, the ground housing  230  may be realized as double shielding walls in which the ground inner wall  231  and the ground outer wall  232  are disposed to surround all sides of the inner side space  230   a . Accordingly, the ground housing  230  may enhance the shielding function for the RF contacts  210  using the double shielding walls. Accordingly, the board connector  200  according to the first embodiment may contribute to further improving the EMI shielding performance and the EMC performance using the double shielding walls. 
     Referring to  FIGS.  2  to  16   , in the board connector  200  according to the first embodiment, the insulation unit  240  may be realized as follows. 
     The insulation unit  240  may include an insulating member  241 , an insertion member  242 , and a connecting member  243 . 
     The insulating member  241  supports the RF contacts  210  and the transmit contacts  220 . The insulating member  241  may be located in the inner side space  230   a . The insulating member  241  may be located inside the ground inner wall  231 . The insulating member  241  may be inserted into an inner side space included in the mating connector. 
     The insertion member  242  is inserted between the ground inner wall  231  and the ground outer wall  232 . As the insertion member  242  is inserted between the ground inner wall  231  and the ground outer wall  232 , the insulation unit  240  may be coupled to the ground housing  230 . The insertion member  242  may be inserted between the ground inner wall  231  and the ground outer wall  232  in an interference fit manner. The insertion member  242  may be disposed outside the insulating member  241 . The insertion member  242  may be disposed to surround the outside of the insulating member  241 . 
     The connecting member  243  is coupled to each of the insertion member  242  and the insulating member  241 . The insertion member  242  and the insulating member  241  may be connected to each other through the connecting member  243 . The connecting member  243  may be formed to have a thickness less than that of each of the insertion member  242  and the insulating member  241  with respect to the vertical direction. Accordingly, a space may be provided between the insertion member  242  and the insulating member  241 , and the mating connector may be inserted into the space. The connecting member  243 , the insertion member  242 , and the connecting member  243  may be integrally formed. 
     The insulation unit  240  may include a soldering inspection window  244  (illustrated in  FIG.  7   ). 
     The soldering inspection window  244  may be formed by passing through the insulation unit  240 . The soldering inspection window  244  may be used to inspect a state in which the first RF mounting members  2111  are mounted on the first board. In this case, the first RF contacts  211  may be coupled to the insulation unit  240  such that the first RF mounting members  2111  are located in the soldering inspection windows  244 . Accordingly, the first RF mounting members  2111  are not covered by the insulation unit  240 . Accordingly, in a state in which the board connector  200  according to the first embodiment is mounted on the first board, a worker may inspect the state, in which first RF mounting members  2111  is mounted on the first board, through the soldering inspection window  244 . Accordingly, in the board connector  200  according to the first embodiment, even when all of the first RF contacts  211  including the first RF mounting members  2111  are located inside the ground housing  230 , the accuracy of a mounting operation of mounting the first RF contacts  211  on the first board may be improved. The soldering inspection window  244  may be formed by passing through the insulating member  241 . 
     The insulation unit  240  may also include a plurality of soldering inspection windows  244 . In this case, the first RF mounting members  2111  may be located in different soldering inspection windows  244 , respectively. The second RF mounting members  2121  and the transmission mounting members  2201  may be located in the soldering inspection windows  244 , respectively. Accordingly, in the state in which the board connector  200  according to the first embodiment is mounted on the first board, a worker may inspect the state, in which the first RF mounting members  2111 , the second RF mounting members  2121 , and the transmission mounting members  2201  are mounted on the first board, through the soldering inspection windows  244 . Accordingly, the board connector  200  according to the first embodiment may improve the accuracy of the operation of mounting the first RF contacts  211 , the second RF contacts  212 , and the transmit contacts  220  on the first board. The soldering inspection windows  244  may be formed by passing through the insulation unit  240  at locations spaced apart from each other. 
     The insulation unit  240  may include a first assembly groove  245  (illustrated in  FIG.  16   ). 
     The first wedge member  234   a  (illustrated in  FIG.  8   ) is inserted into the first assembly groove  245 . As the first wedge member  234   a  is inserted into the first assembly groove  245 , the first wedge member  234   a  may be wedged in the insulation unit  240  to fix the ground housing  230  and the insulation unit  240 . The first assembly groove  245  may be realized as a groove formed to a predetermined depth in the insulating member  241 . The first-first shield protrusion  2512  may be inserted into the first assembly groove  245 . The first-first shield protrusion  2512  may be inserted into the first assembly groove  245  to be connected to the first wedge member  234   a . Accordingly, the first-first ground contact  251  may be electrically connected to the ground housing  230 . 
     The insulation unit  240  may include a second assembly groove  246  (illustrated in FIG.  16 ). 
     The second wedge member  234   b  (illustrated in  FIG.  8   ) is inserted into the second assembly groove  246 . As the second wedge member  234   b  is inserted into the second assembly groove  246 , the second wedge member  234   b  may be wedged in the insulation unit  240  to fix the ground housing  230  and the insulation unit  240 . The second assembly groove  246  may be realized as a groove formed to a predetermined depth in the insulating member  241 . The second-first shield protrusion  2612  may be inserted into the second assembly groove  246 . The second-first shield protrusion  2612  may be inserted into the second assembly groove  246  to be connected to the second wedge member  234   b . Accordingly, the second-first ground contact  261  may be electrically connected to the ground housing  230 . 
     &lt;Board Connector  300  According to Second Embodiment&gt; 
     Referring to  FIGS.  2 ,  17 , and  18   , the board connector  300  according to the second embodiment may include a plurality of RF contacts  310 , a plurality of transmit contacts  320 , a ground housing  330 , and an insulation unit  340 . 
     The RF contacts  310  are for transmitting RF signals. The RF contacts  310  may transmit ultra-high frequency RF signals. The RF contacts  310  may be supported by the insulation unit  340 . The RF contacts  310  may be coupled to the insulation unit  340  through an assembly process. The RF contacts  310  may also be integrally molded with the insulation unit  340  through injection molding. 
     The RF contacts  310  may be disposed to be spaced apart from each other. The RF contacts  310  may be electrically connected to the second board by being mounted on the second board. The RF contacts  310  may be electrically connected to the first board, on which a mating connector is mounted, by being connected to RF contacts included in the mating connector. Accordingly, the second board and the first board may be electrically connected. In this case, the mating connector may be realized as the board connector  200  according to the first embodiment. Meanwhile, the mating connector in the board connector  200  according to the first embodiment may also be realized as the board connector  300  according to the second embodiment. 
     A first RF contact  311  among the RF contacts  310  and a second RF contact  312  among the RF contacts  310  may be spaced apart from each other along the first axial direction (X-axis direction). The first RF contact  311  and the second RF contact  312  may be supported by the insulation unit  340  at locations spaced apart from each other along the first axial direction (X-axis direction). 
     The first RF contact  311  may include a first RF mounting member  3111 . The first RF mounting member  3111  may be mounted on the second board. Accordingly, the first RF contact  311  may be electrically connected to the second board through the first RF mounting member  3111 . The first RF contact  311  may be formed of an electrically conductive material. For example, the first RF contact  311  may be formed of metal. The first RF contact  311  may be connected to any one of the RF contacts included in the mating connector. 
     The second RF contact  312  may include a second RF mounting member  3121 . The second RF mounting member  3121  may be mounted on the second board. Accordingly, the second RF contact  312  may be electrically connected to the second board through the second RF mounting member  3121 . The second RF contact  312  may be formed of an electrically conductive material. For example, the second RF contact  312  may be formed of metal. The second RF contact  312  may be connected to any one of the RF contacts included in the mating connector. 
     Referring to  FIGS.  2 ,  16 , and  17   , the transmit contacts  320  are coupled to the insulation unit  340 . The transmit contacts  320  may serve to transmit signals, data, and the like. The transmit contacts  320  may be coupled to the insulation unit  340  through an assembly process. The transmit contacts  320  may also be integrally molded with the insulation unit  340  through injection molding. 
     The transmit contacts  320  may be disposed between the first RF contact  311  and the second RF contact  312  with respect to the first axial direction (X-axis direction). Accordingly, in order to reduce RF signal interference between the first RF contact  311  and the second RF contact  312 , the transmit contacts  320  may be disposed in a space in which the first RF contact  311  and the second RF contact  312  are spaced apart. Accordingly, the board connector  300  according to the second embodiment may not only reduce RF signal interference by increasing a distance by which the first RF contact  311  and the second RF contact  312  are spaced apart from each other, but also improve space utilization for the insulation unit  340  by disposing the transmit contacts  320  in a separation space for this purpose. 
     The transmit contacts  320  may be disposed to be spaced apart from each other. The transmit contacts  320  may be electrically connected to the second board by being mounted on the second board. In this case, a transmission mounting member  3201  included in each of the transmit contacts  320  may be mounted on the second board. The transmit contacts  320  may be formed of an electrically conductive material. For example, the transmit contacts  320  may be formed of metal. The transmit contacts  320  may be electrically connected to the second board, on which the mating connector is mounted, by being connected to transmit contacts included in the mating connector. Accordingly, the second board and the first board may be electrically connected. 
     Meanwhile, in  FIG.  18   , the board connector  300  according to the second embodiment is illustrated as including four transmit contacts  320 , but the present disclosure is not limited thereto, and the board connector  300  according to the second embodiment may also include five or more transmit contacts  320 . The transmit contacts  320  may be spaced apart from each other along the first axial direction (X-axis direction) and the second axial direction (Y-axis direction). 
     Referring to  FIGS.  17  to  19   , the ground housing  330  is coupled to the insulation unit  340 . The ground housing  330  may be grounded by being mounted on the second board. Accordingly, the ground housing  330  may realize a shielding function against signals, electromagnetic waves, or the like for the RF contacts  310 . In this case, the ground housing  330  may prevent electromagnetic waves generated from the RF contacts  310  from interfering with signals of circuit components located around the electronic device, and may prevent electromagnetic waves generated from the circuit components located around the electronic device from interfering with RF signals transmitted by the RF contacts  310 . Accordingly, the board connector  300  according to the second embodiment may contribute to improving EMI shielding performance and EMC performance using the ground housing  330 . The ground housing  330  may be formed of an electrically conductive material. For example, the ground housing  330  may be formed of metal. 
     The ground housing  330  may be disposed to surround sides of an inner side space  330   a . The insulation unit  340  may be located in the inner side space  330   a . All of the first RF contact  311 , the second RF contact  312 , and the transmit contacts  220  may be located in the inner side space  330   a . In this case, all of the first RF mounting member  3111 , the second RF mounting member  3121 , and the transmission mounting members  3201  may also be located in the inner side space  330   a . Accordingly, the ground housing  330  may enhance a shielding function for the first RF contact  311  and the second RF contact  312  by realizing shielding walls for all of the first RF contact  311  and the second RF contact  312 , thereby realizing complete shielding. The mating connector may be inserted into the inner side space  330   a . In this case, a portion of the mating connector may be inserted into the inner side space  330   a , and a portion of the board connector  300  according to the second embodiment may be inserted into an inner side space included in the mating connector. 
     The ground housing  330  may be disposed to surround all sides of the inner side space  330   a . The inner side space  330   a  may be disposed inside the ground housing  330 . When the entire ground housing  330  is formed in a rectangular loop shape, the inner side space  330   a  may be formed in a rectangular parallelepiped shape. In this case, the ground housing  330  may be disposed to surround four sides of the inner side space  330   a.    
     The ground housing  330  may be integrally formed as one piece without a seam. The ground housing  330  may be integrally formed as one piece without a seam by a metal injection method, such as a metal die casting method, an MIM method, or the like. The ground housing  330  may be integrally formed as one piece without a seam by a CNC process, an MCT process, or the like. 
     Referring to  FIGS.  17  to  19   , the insulation unit  340  supports the RF contacts  310 . The RF contacts  310  and the transmit contacts  320  may be coupled to the insulation unit  340 . The insulation unit  340  may be formed of an insulating material. The insulation unit  340  may be coupled to the ground housing  330  such that the RF contacts  310  are located in the inner side space  330   a.    
     Referring to  FIGS.  9  and  17  to  20   , the board connector  300  according to the second embodiment may include a first ground contact  350 . 
     The first ground contact  350  is coupled to the insulation unit  340 . The first ground contact  350  may be grounded by being mounted on the second board. The first ground contact  350  may be coupled to the insulation unit  340  through an assembly process. The first ground contact  350  may also be integrally molded with the insulation unit  340  through injection molding. 
     The first ground contact  350  may realize a shielding function for the first RF contact  311  together with the ground housing  330 . In this case, the first ground contact  350  may be disposed between the first RF contact  311  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). The first ground contact  350  may be formed of an electrically conductive material. For example, the first ground contact  350  may be formed of metal. When the mating connector is inserted into the inner side space  330   a , the first ground contact  350  may be connected to a ground contact included in the mating connector. 
     Although not illustrated in the drawings, the board connector  300  according to the second embodiment may also include a plurality of first ground contacts  350 . The first ground contacts  350  may be disposed to be spaced apart from each other along the second axial direction (Y-axis direction). A gap, which is formed as the first ground contacts  350  are spaced apart from each other, may be blocked as the first ground contact  350  is connected to the ground contact included in the mating connector. 
     Referring to  FIGS.  9  and  17  to  20   , the board connector  300  according to the second embodiment may include a second ground contact  360 . 
     The second ground contact  360  is coupled to the insulation unit  340 . The second ground contact  360  may be grounded by being mounted on the second board. The second ground contact  360  may be coupled to the insulation unit  340  through an assembly process. The second ground contact  360  may also be integrally molded with the insulation unit  340  through injection molding. 
     The second ground contact  360  may realize a shielding function for the second RF contact  312  together with the ground housing  330 . The second ground contact  360  may be disposed between the transmit contacts  320  and the second RF contact  312  with respect to the first axial direction (X-axis direction). The second ground contact  360  may be formed of an electrically conductive material. For example, the second ground contact  360  may be formed of metal. When the mating connector is inserted into the inner side space  330   a , the second ground contact  360  may be connected to the ground contact included in the mating connector. 
     Although not illustrated in the drawings, the board connector  300  according to the second embodiment may also include a plurality of second ground contact  360 . The second ground contacts  360  may be disposed to be spaced apart from each other along the second axial direction (Y-axis direction). A gap, which is formed as the second ground contacts  360  are spaced apart from each other, may be blocked as the second ground contact  360  is connected to the ground contact included in the mating connector. 
     Here, the board connector  300  according to the second embodiment may be realized to include a plurality of first RF contacts  311  and a plurality of second RF contacts  312 . 
     Referring to  FIGS.  9  and  17  to  21   , the first RF contacts  311  and the second RF contacts  312  may be disposed to be spaced apart from each other along the first axial direction (X-axis direction). The transmit contacts  320  may be disposed between the first RF contacts  311  and the second RF contacts  312  with respect to the first axial direction (X-axis direction). In this case, the first ground contact  350  may shield between the first RF contacts  311  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). The second ground contact  360  may shield between the second RF contacts  312  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). 
     When the plurality of first RF contacts  311  are provided, the first ground contact  350  may shield between the first RF contacts  311  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). As the first ground contact  350  is connected to the ground contact included in the mating connector, between the first RF contacts  311  with respect to the second axial direction (Y-axis direction) may be shielded. Accordingly, by using the first ground contact  350 , the board connector  300  according to the second embodiment may realize a shielding function for between the first RF contacts  311  and the transmit contacts  320 , and also, additionally realize a shielding function for between the first RF contacts  311  using the connection between the first ground contact  350  and the ground contact included in the mating connector. In this case, the board connector  300  according to the second embodiment may shield between the first RF contacts  311  using the ground housing  330 . Accordingly, the board connector  300  according to the second embodiment may be realized to transmit a wider variety of RF signals using the first RF contacts  311 , thereby improving versatility applicable to a wider variety of electronic products. 
     A first-first RF contact  311   a  among the first RF contacts  311  and a first-second RF contact  311   b  among the first RF contacts  311  may be coupled to the insulation unit  340  so as to be spaced apart from each other along the second axial direction (Y-axis direction). In  FIG.  21   , the board connector  300  according to the second embodiment is illustrated as including two first RF contacts  311  realized as the first-first RF contact  311   a  and the first-second RF contact  311   b , but the present disclosure is not limited thereto, and the board connector  300  according to the second embodiment may also include three or more first RF contacts  311 . Meanwhile, in the present specification, descriptions will be made on the basis of the case in which the board connector  300  according to the second embodiment includes the first-first RF contact  311   a  and the first-second RF contact  311   b.    
     When the first-first RF contact  311   a  and the first-second RF contact  311   b  are provided, the first ground contact  350  may include a first ground mounting member  351  (illustrated in  FIG.  9   ) and a first ground connection member  352  (illustrated in  FIG.  9   ). 
     The first ground mounting member  351  is mounted on the second board. The first ground mounting member  351  may be grounded by being mounted on the second board. Accordingly, the first ground contact  350  may be grounded to the second board through the first ground mounting member  351 . The first ground mounting member  351  may be disposed along the second axial direction (Y-axis direction). In this case, the first ground mounting member  351  may be disposed between the first-first RF contact  311   a  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). The first ground mounting member  351  may also be disposed between the first-second RF contact  311   b  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). The first ground mounting member  351  may be formed in a plate shape disposed in the vertical direction. The first ground mounting member  351  may be connected to the ground contact included in the mating connector. For example, as shown in  FIG.  8   , the first ground mounting member  351  may be connected to the first-first ground connection member  2513  included in the mating connector. 
     The first ground connection member  352  is coupled to the first ground mounting member  351 . The first ground connection member  352  may protrude from the first ground mounting member  351  along the vertical direction. The first ground connection member  352  may be connected to the ground contact included in the mating connector. Accordingly, the first ground contact  350  may be electrically connected to the ground contact included in the mating connector by being connected to the ground contact included in the mating connector through the first ground connection member  352 . Accordingly, the first ground contact  350  may realize a shielding force for the first-first RF contact  311   a  and the first-second RF contact  311   b  through the connection between the first ground connection member  352  and the ground contact included in the mating connector. In this case, the first ground contact  350  may realize a shielding force that shields between each of the first-first RF contact  311   a  and the first-second RF contact  311   b  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). In this case, the first ground contact  350  may realize a shielding force that shields between the first-first RF contact  311   a  and the first-second RF contact  311   b  with respect to the second axial direction (Y-axis direction). The first ground connection member  352  may be formed in a plate shape disposed in the vertical direction. 
     The first ground contact  350  may include a plurality of first ground connection members  352 . First ground connection members  352  and  352 ′ (illustrated in  FIG.  9   ) may be disposed to be spaced apart from each other along the second axial direction (Y-axis direction). The first ground connection members  352  may be connected to different ground contacts included in the mating connectors, respectively. For example, as shown in  FIG.  9   , the first ground connection members  352  and  352 ′ may be respectively connected to the first-first ground contact  251  and the first-second ground contact  252  included in the mating connector. In this case, the first ground connection member  352  may be connected to the first-first ground connection member  2513  included in the first-first ground contact  251 . The first ground connection member  352 ′ may be connected to the first-second ground connection member  2521  included in the first-second ground contact  252 . When the mating connector is inserted into the inner side space  330   a , the first-first shield member  2511  of the first-first ground contact  251  included in the mating connector may be located between the first-first RF contact  311   a  and the first-second RF contact  311   b  with respect to the second axial direction (Y-axis direction). 
     As described above, the board connector  300  according to the second embodiment may realize a first ground loop  350   a  (illustrated in  FIG.  21   ) for the first-first RF contact  311   a  and the first-second RF contact  311   b  using the connection between the first ground contact  350  and the ground contact included in the mating connector. Accordingly, the board connector  300  according to the second embodiment may further enhance the shielding performance for the first-first RF contact  311   a  and the first-second RF contact  311   b  using the first ground loop  350   a , thereby realizing complete shielding for the first-first RF contact  311   a  and the first-second RF contact  311   b.    
     When the plurality of second RF contacts  312  are provided, the second ground contact  360  may shield between the second RF contacts  312  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). As the second ground contact  360  is connected to the ground contact included in the mating connector, shielding may be provided between the second RF contacts  312  with respect to the second axial direction (Y-axis direction). Accordingly, by using the second ground contact  360 , the board connector  300  according to the second embodiment may realize a shielding function for between the second RF contacts  312  and the transmit contacts  320 , and also, additionally realize a shielding function for between the second RF contacts  312  using the connection between the second ground contact  360  and the ground contact included in the mating connector. In this case, the board connector  300  according to the second embodiment may shield between the second RF contacts  312  using the ground housing  330 . Accordingly, the board connector  300  according to the second embodiment may be realized to transmit a wider variety of RF signals using the second RF contacts  312 , thereby improving versatility applicable to a wider variety of electronic products. 
     A second-first RF contact  312   a  among the second RF contacts  312  and a second-second RF contact  312   b  among the second RF contacts  312  may be coupled to the insulation unit  340  so as to be spaced apart from each other along the second axial direction (Y-axis direction). In  FIG.  21   , the board connector  300  according to the second embodiment is illustrated as including two second RF contacts  312  realized as the second-first RF contact  312   a  and the second-second RF contact  312   b , but the present disclosure is not limited thereto, and the board connector  300  according to the second embodiment may also include three or more second RF contacts  312 . Meanwhile, in the present specification, descriptions will be made on the basis of the case in which the board connector  300  according to the second embodiment includes the second-first RF contact  312   a  and the second-second RF contact  312   b.    
     When the second-first RF contact  312   a  and the second-second RF contact  312   b  are provided, the second ground contact  360  may include a second ground mounting member  361  (illustrated in  FIG.  20   ) and a second ground connection member  362  (illustrated in  FIG.  20   ). 
     The second ground mounting member  361  is mounted on the second board. The second ground mounting member  361  may be grounded by being mounted on the second board. Accordingly, the second ground contact  360  may be grounded to the second board through the second ground mounting member  361 . The second ground mounting member  361  may be disposed along the second axial direction (Y-axis direction). In this case, the second ground mounting member  361  may be disposed between the second-first RF contact  312   a  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). The second ground mounting member  361  may also be disposed between the second-second RF contact  312   b  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). The second ground mounting member  361  may be formed in a plate shape disposed in the vertical direction. The second ground mounting member  361  may be connected to the ground contact included in the mating connector. For example, as shown in  FIG.  8   , the second ground mounting member  361  may be connected to the second-first ground connection member  2613  included in the mating connector. 
     The second ground connection member  362  is coupled to the second ground mounting member  361 . The second ground connection member  362  may protrude from the second ground mounting member  361  along the vertical direction. The second ground connection member  362  may be connected to the ground contact included in the mating connector. Accordingly, the second ground contact  360  may be electrically connected to the ground contact included in the mating connector by being connected to the ground contact included in the mating connector through the second ground connection member  362 . Accordingly, the second ground contact  360  may realize a shielding force for the second-first RF contact  312   a  and the second-second RF contact  312   b  through the connection between the second ground connection member  362  and the ground contact included in the mating connector. In this case, the second ground contact  360  may realize a shielding force that shields between each of the second-first RF contact  312   a  and the second-second RF contact  312   b  and the transmit contacts  320  with respect to the first axial direction (X-axis direction). In this case, the second ground contact  360  may realize a shielding force that shields between the second-first RF contact  312   a  and the second-second RF contact  312   b  with respect to the second axial direction (Y-axis direction). The second ground connection member  362  may be formed in a plate shape disposed in the vertical direction. 
     The second ground contact  360  may include a plurality of second ground connection members  362 . Second ground connection members  362  and  362 ′ (illustrated in  FIG.  20   ) may be disposed to be spaced apart from each other along the second axial direction (Y-axis direction). The second ground connection members  362  may be connected to different ground contacts included in the mating connectors, respectively. For example, as shown in  FIG.  20   , the second ground connection members  362  and  362 ′ may be respectively connected to the second-first ground contact  261  and the second-second ground contact  262  included in the mating connector. In this case, the second ground connection member  362  may be connected to the second-first ground connection member  2613  included in the second-first ground contact  261 . The second ground connection member  362 ′ may be connected to the second-second ground connection member  2621  included in the second-second ground contact  262 . When the mating connector is inserted into the inner side space  330   a , the second-first shield member  2611  of the second-first ground contact  261  included in the mating connector may be located between the second-first RF contact  312   a  and the second-second RF contact  312   b  with respect to the second axial direction (Y-axis direction). 
     As described above, the board connector  300  according to the second embodiment may realize a second ground loop  360   a  (illustrated in  FIG.  21   ) for the second-first RF contact  312   a  and the second-second RF contact  312   b  using the connection between the second ground contact  360  and the ground contact included in the mating connector. Accordingly, the board connector  300  according to the second embodiment may further enhance the shielding performance for the second-first RF contact  312   a  and the second-second RF contact  312   b  using the second ground loop  360   a , thereby realizing complete shielding for the second-first RF contact  312   a  and the second-second RF contact  312   b.    
     Referring to  FIGS.  8 ,  9 , and  11  to  23   , in the board connector  300  according to the second embodiment, the ground housing  330  may be realized as follows. 
     The ground housing  330  may include a ground sidewall  331  and a ground bottom  332 . 
     The ground sidewall  331  is disposed to surround a side of the inner side space  330   a . The ground sidewall  331  may be disposed to surround all sides of the inner side space  330   a . When the mating connector is inserted into the inner side space  330   a , the ground sidewall  331  may be connected to the ground housing included in the mating connector. For example, the ground sidewall  331  may be connected to the ground outer wall  232  of the ground housing  230  included in the mating connector. The ground sidewall  331  may be formed in a plate shape disposed in the vertical direction. 
     The ground bottom  332  protrudes from a lower end of the ground sidewall  331  toward the inner side space  330   a . That is, the ground bottom  332  may protrude to the inside of the ground sidewall  331 . The ground bottom  332  may extend along the lower end of the ground sidewall  331  and formed in a closed loop shape. The ground bottom  332  may be grounded by being mounted on the second board. Accordingly, the ground sidewall  331  may be grounded through the ground bottom  332 . In this case, the ground housing  330  may be grounded through the ground bottom  332 . When the mating connector is inserted into the inner side space  330   a , the ground bottom  332  may be connected to the ground housing included in the mating connector. For example, the ground bottom  332  may be connected to the ground connection wall  233  of the ground housing  230  included in the mating connector. The ground bottom  332  may be formed in a plate shape disposed in the horizontal direction. 
     The ground bottom  332  and the ground sidewall  331  may be disposed to surround the inner side space  330   a . In this case, the first RF contact  311  and the second RF contact  312  may be located in the inner side space  330   a  surrounded by the ground bottom  332  and the ground sidewall  331 . Accordingly, the ground bottom  332  and the ground sidewall  331  may enhance the shielding function for the first RF contact  311  and the second RF contact  312  by realizing shielding walls for all of the first RF contact  311  and the second RF contact  312 , thereby realizing complete shielding. 
     The ground bottom  332  and the ground sidewall  331  may be integrally formed. In this case, the ground housing  330  may be integrally formed as one piece without a seam. The ground housing  330  may be integrally formed as one piece without a seam by a metal injection method, such as a metal die casting method, an MIM method, or the like. The ground housing  330  may be integrally formed as one piece without a seam by a CNC process, an MCT process, or the like. 
     The ground housing  330  may include a first shield bottom  333 . 
     The first shield bottom  333  protrudes from the ground bottom  332 . The first shield bottom  333  protrudes from the ground bottom  332  toward the first ground contact  350 , and thus may be located between the first-first RF contact  311   a  and the first-second RF contact  311   b  with respect to the second axial direction (Y-axis direction). Accordingly, the first shield bottom  333  may shield between the first-first RF contact  311   a  and the first-second RF contact  311   b  with respect to the second axial direction (Y-axis direction). The first shield bottom  333  may be formed in a plate shape disposed in the vertical direction. 
     The first shield bottom  333  may be connected to the ground contact included in the mating connector. For example, as shown in  FIG.  8   , the first shield bottom  333  may be connected to the first-first ground contact  251  included in the mating connector. In this case, the first shield bottom  333  may be connected to the first-first connection protrusion  2516  included in the first ground contact  250 . Accordingly, the board connector  300  according to the second embodiment may realize the first ground loop  350   a  for the first-first RF contact  311   a  and the first-second RF contact  311   b  using the connection between the first shield bottom  333  and the ground contact included in the mating connector. The first shield bottom  333  and the ground bottom  332  may be integrally formed. 
     The ground housing  330  may include a second shield bottom  334 . 
     The second shield bottom  334  protrudes from the ground bottom  332 . The second shield bottom  334  protrudes from the ground bottom  332  toward the second ground contact  360 , and thus may be located between the second-first RF contact  312   a  and the second-second RF contact  312   b  with respect to the second axial direction (Y-axis direction). Accordingly, the second shield bottom  334  may shield between the second-first RF contact  312   a  and the second-second RF contact  312   b  with respect to the second axial direction (Y-axis direction). The second shield bottom  334  may be formed in a plate shape disposed in the vertical direction. 
     The second shield bottom  334  may be connected to the ground contact included in the mating connector. For example, as shown in  FIG.  8   , the second shield bottom  334  may be connected to the second-first ground contact  261  included in the mating connector. In this case, the second shield bottom  334  may be connected to the second-first connection protrusion  2616  included in the second-first ground contact  261 . Accordingly, the board connector  300  according to the second embodiment may realize the second ground loop  360   a  for the second-first RF contact  312   a  and the second-second RF contact  312   b  using the connection between the second shield bottom  334  and the ground contact included in the mating connector. The second shield bottom  334  and the ground bottom  332  may be integrally formed. 
     The ground housing  330  may include a ground top wall  335 . 
     The ground top wall  335  protrudes from an upper end of the ground sidewall  331  to a side opposite to the inner side space  330   a . In this case, the ground top wall  335  may protrude toward the outside of the ground sidewall  331 . The ground top wall  335  may extend along the upper end of the ground sidewall  331  and may be formed in a closed loop shape. The ground top wall  335  may be formed in a plate shape disposed in the horizontal direction. 
     The ground top wall  335 , the ground bottom  332 , and the ground sidewall  331  may be integrally formed. In this case, the ground housing  330  may be integrally formed as one piece without a seam. The ground housing  330  may be integrally formed as one piece without a seam by a metal injection method, such as a metal die casting method, an MIM method, or the like. The ground housing  330  may be integrally formed as one piece without a seam by a CNC process, an MCT process, or the like. 
     A connection portion of the ground top wall  335  and the ground sidewall  331  may be formed to be rounded as shown in  FIGS.  8  and  9   . Accordingly, the connection portion between the ground top wall  335  and the ground sidewall  331  may serve as a guide for the mating connector when the mating connector is inserted into the inner side space  330   a . In this case, in the connection portion of the ground top wall  335  and the ground sidewall  331 , a portion facing the inner side space  330   a  may be formed to be rounded. 
     The ground top wall  335 , the ground sidewall  331 , and the ground bottom  332  may realize shielding walls. In this case, as shown in  FIGS.  19  and  21   , the ground housing  330  may include a first shielding wall  330   b , a second shielding wall  330   c , a third shielding wall  330   d , and a fourth shielding wall  330   e . Each of the first shielding wall  330   b , the second shielding wall  330   c , the third shielding wall  330   d , and the fourth shielding wall  330   e  may be realized by the ground sidewall  331 , the ground bottom  332 , and the ground top wall  335 . The first shielding wall  330   b  and the second shielding wall  330   c  are disposed to face each other with respect to the first axial direction (X-axis direction). The first RF contacts  311  and the second RF contacts  312  may be located between the first shielding wall  330   b  and the second shielding wall  330   c  with respect to the first axial direction (X-axis direction). The first RF contacts  311  may be located at locations each having a shorter separation distance from the first shielding wall  330   b  than a separation distance from the second shielding wall  330   c  with respect to the first axial direction (X-axis direction). The second RF contacts  312  may be located at locations each having a shorter separation distance from the second shielding wall  330   c  than a separation distance from the first shielding wall  330   b  with respect to the first axial direction (X-axis direction). The third shielding wall  330   d  and the fourth shielding wall  330   e  are disposed to face each other with respect to the second axial direction (Y-axis direction). The first RF contacts  311  and the second RF contacts  312  may be located between the third shielding wall  330   d  and the fourth shielding wall  330   e  with respect to the second axial direction (Y-axis direction). 
     In this case, the first ground contact  350 , the first shielding wall  330   b , the third shielding wall  330   d , the fourth shielding wall  330   e , and the first shield bottom  333  may realize the first ground loop  350   a  (illustrated in  FIG.  21   ) for the first-first RF contact  311   a  and the first-second RF contact  311   b . Accordingly, the board connector  300  according to the second embodiment may further enhance the shielding function for the first-first RF contact  311   a  and the first-second RF contact  311   b  using the first ground loop  350   a , thereby realizing complete shielding for the first-first RF contact  311   a  and the first-second RF contact  311   b.    
     In this case, the second ground contact  360 , the second shielding wall  330   c , the third shielding wall  330   d , the fourth shielding wall  330   e , and the second shield bottom  334  may realize the second ground loop  360   a  (illustrated in  FIG.  21   ) for the second-first RF contact  312   a  and the second-second RF contact  312   b . Accordingly, the board connector  300  according to the second embodiment may further enhance the shielding function for the second-first RF contact  312   a  and the second-second RF contact  312   b  using the second ground loop  360   a , thereby realizing complete shielding for the second-first RF contact  312   a  and the second-second RF contact  312   b.    
     Referring to  FIGS.  8  to  13  and  23   , the ground housing  330  may include the following configuration in order to further enhance the shielding function by improving the contact between the ground sidewall  331  and the ground housing of the mating connector. 
     First, as shown in  FIG.  11   , the ground housing  330  may include the connection protrusion  336 . The connection protrusion  336  may be formed on an inner surface of the ground sidewall  331 . The connection protrusion  336  may protrude from the inner surface of the ground sidewall  331 . The connection protrusion  336  may be inserted into the ground housing  230  included in the mating connector. In this case, the connection protrusion  336  may be inserted into the connection groove  235  included in the ground housing  230  of the mating connector. Accordingly, the board connector  300  according to the second embodiment may further enhance the shielding function for the first RF contact  311  and the second RF contact  312  by improving the contact between the ground housing  330  and the ground housing  230  included in the mating connector using the connection protrusion  336 . In  FIG.  11   , the connection protrusion  336  is illustrated as being formed to have a shorter length than the connection groove  235  with respect to the vertical direction, but the present disclosure is not limited thereto, and the connection protrusion  336  and the connection groove  235  may be formed to have lengths substantially equal to each other. The ground housing  330  may also include a plurality of connection protrusions  336 . In this case, the connection protrusions  336  may be disposed to be spaced apart from each other along the inner surface of the ground sidewall  331 . 
     Next, as shown in  FIG.  12   , the ground housing  330  may include the connection groove  337 . The connection groove  337  may be formed on the inner surface of the ground sidewall  331 . The connection groove  337  may be realized as a groove formed to a predetermined depth in the inner surface of the ground sidewall  331 . The ground housing  230  included in the mating connector may be inserted into the connection groove  337 . In this case, the connection protrusion  236  included in the ground housing  230  of the mating connector may be inserted into the connection groove  337 . Accordingly, the board connector  300  according to the second embodiment may further enhance the shielding function for the first RF contact  311  and the second RF contact  312  by improving the contact between the ground housing  330  and the ground housing  230  included in the mating connector using the connection groove  337 . In  FIG.  10   , the connection groove  337  is illustrated as being formed to have a longer length than the connection protrusion  236  with respect to the vertical direction, but the present disclosure is not limited thereto, and the connection groove  337  and the connection protrusion  236  may be formed to have lengths substantially equal to each other. Meanwhile, the ground sidewall  331  may support the connection protrusion  236  that is inserted into the connection groove  337 , so that the connection protrusion  236  is prevented from being separated from the connection groove  337 . The ground housing  330  may also include a plurality of connection grooves  337 . In this case, the connection grooves  337  may be disposed to be spaced apart from each other along the inner surface of the ground sidewall  331 . 
     Next, as shown in  FIG.  13   , when the ground housing  330  includes the connection protrusion  336 , the connection protrusion  336  may be supported by the connection protrusion  236  included in the ground housing  230  of the mating connector. Accordingly, the board connector  300  according to the second embodiment may further enhance the shielding function for the first RF contact  311  and the second RF contact  312  by improving the contact between the ground housing  330  and the ground housing  230  included in the mating connector using the connection protrusion  336 . Meanwhile, the connection protrusion  336  may be disposed on an upper side of the connection protrusion  236  to support the connection protrusion  236 . 
     Next, as shown in  FIG.  8   , the ground housing  330  may be in contact with the ground housing  330  of the mating connector as the inner surface of the ground sidewall  331  is brought into surface contact with the ground housing  330  of the mating connector. In this case, a gap may occur between the inner surface of the ground sidewall  331  and the ground housing  230  of the mating connector, and in order to compensate for the gap, as shown in  FIG.  23   , the ground housing  330  may include a conductive member  338 . The conductive member  338  may be coupled to the inner surface of the ground sidewall  331 . The conductive member  338  may extend along the inner surface of the ground sidewall  331 , including a corner portion  3301  (illustrated in  FIG.  22   ) included in the inner surface of the ground sidewall  331  to form a closed loop shape. Accordingly, the board connector  300  according to the second embodiment may further enhance the shielding function for the first RF contact  311  and the second RF contact  312  by improving the contact between the ground housing  330  and the ground housing  230  included in the mating connector using the conductive member  338 . In addition, in the case of the embodiment using the connection protrusion  336  and the connection groove  337 , it is difficult to realize the connection protrusion  336  and the connection groove  337  at the corner portion  3301  included in the inner surface of the ground sidewall  331 , but in the case of the embodiment using the conductive member  338 , it is possible to improve the easiness of the operation of realizing the conductive member  338  at the corner portion  3301  included in the inner surface of the ground sidewall  331 . The conductive member  338  may be formed of an electrically conductive material to electrically connect the ground sidewall  331  and the ground housing  230  of the mating connector. For example, the conductive member  338  may be formed of metal. After the conductive member  338  is separately manufactured, the conductive member  338  may be coupled to the ground sidewall  331  by being mounted, attached, fastened, and the like to the inner surface of the ground sidewall  331 . The conductive member  338  may also be coupled to the ground sidewall  331  by applying a conductive shielding material to the inner surface of the ground sidewall  331 . 
     Referring to  FIGS.  17  to  23   , the ground housing  330  may include a coupling member  339 . 
     The coupling member  339  protrudes upward from the ground bottom  332 . When the ground housing  330  is coupled to the insulation unit  340 , the coupling member  339  may be inserted into the insulation unit  340 . Accordingly, the coupling member  339  may firmly couple the ground housing  330  and the insulation unit  340 . The coupling member  339  may also be coupled to the insulation unit  340  in an interference fit manner. The coupling member  339  and the ground bottom  332  may be integrally formed. A coupling groove (not shown) for inserting the coupling member  339  thereto may be formed in the insulation unit  340 . The coupling groove may be formed on a lower surface of the insulation unit  340 . 
     The ground housing  330  may also include a plurality of coupling members  339 . In this case, the coupling members  339  may be disposed to be spaced apart from each other along the ground bottom  332 . In  FIG.  22   , the ground housing  330  is illustrated as including four coupling members  339 , but the present disclosure is not limited thereto, and the ground housing  330  may also include two, three, or five or more coupling members  339 . The coupling grooves may be formed in the insulation unit  340  in the same number as the coupling members  339 . 
     The ground housing  330  may include a wedge member  3391  protruding from the coupling member  339 . As the coupling member  339  is inserted into the insulation unit  340 , the wedge member  3391  may be wedged in the insulation unit  340  to fix the ground housing  330  and the insulation unit  340 . Accordingly, the board connector  300  according to the second embodiment may more firmly couple the ground housing  330  and the insulation unit  340  using the wedge member  3391 . When the coupling member  339  is disposed to be spaced apart from the ground sidewall  331  along the second axial direction (Y-axis direction), the wedge member  3391  may protrude from a side surface of the coupling member  339  along the first axial direction (X-axis direction). The wedge member  3391  and the coupling member  339  may be integrally formed. 
     Referring to  FIGS.  17  to  23   , in the board connector  300  according to the second embodiment, the insulation unit  340  may include a soldering inspection window  341  (illustrated in  FIG.  19   ). 
     The soldering inspection window  341  may be formed by passing through the insulation unit  340 . The soldering inspection window  341  may be used to inspect a state in which the first RF mounting members  3111  are mounted on the second board. In this case, the first RF contacts  311  may be coupled to the insulation unit  340  such that the first RF mounting members  3111  are located in the soldering inspection window  341 . Accordingly, the first RF mounting members  3111  are not covered by the insulation unit  340 . Accordingly, in a state in which the board connector  300  according to the second embodiment is mounted on the second board, a worker may inspect the state, in which first RF mounting members  3111  are mounted on the second board, through the soldering inspection window  341 . Accordingly, in the board connector  300  according to the second embodiment, even when all of the first RF contacts  311  including the first RF mounting members  3111  are located inside the ground housing  330 , the accuracy of a mounting operation of mounting the first RF contacts  311  on the second board may be improved. The soldering inspection window  341  may be formed by passing through the insulating member  241 . 
     The insulation unit  340  may also include a plurality of soldering inspection windows  341 . In this case, the first RF mounting members  3111  may be located in different soldering inspection windows  341 , respectively. The second RF mounting members  3121  and the transmission mounting members  3201  may be located in the soldering inspection windows  341 , respectively. Accordingly, in the state in which the board connector  300  according to the second embodiment is mounted on the second board, a worker may inspect the state, in which the first RF mounting members  3111 , the second RF mounting members  3121 , and the transmission mounting members  3201  are mounted on the second board, through the soldering inspection windows  341 . Accordingly, the board connector  300  according to the second embodiment may improve the accuracy of the operation of mounting the first RF contacts  311 , the second RF contacts  312 , and the transmit contacts  320  on the second board. The soldering inspection windows  341  may be formed by passing through the insulation unit  340  at locations spaced apart from each other. 
     Hereinafter, an embodiment of a mounting pattern of the board, on which the board connector according to the present disclosure is mounted, will be described in detail with reference to the accompanying drawings. 
       FIGS.  24  to  27    are conceptual bottom views illustrating an embodiment of a mounting pattern of a board on which the board connector according to the first embodiment is mounted, and  FIGS.  28  to  31    are conceptual bottom views illustrating an embodiment of a mounting pattern of a board on which the board connector according to the second embodiment is mounted.  FIGS.  24  to  27    illustrate a location of the mounting pattern on the basis of a bottom surface of the board connector according to the first embodiment described with reference to  FIG.  5   .  FIGS.  28  to  31    illustrate a location of the mounting pattern on the basis of a bottom surface of the board connector according to the second embodiment described with reference to  FIG.  21   . In  FIGS.  24  to  31   , hatched regions are the locations of the mounting patterns. 
     Referring to  FIGS.  24  to  27   , the board connector  200  according to the first embodiment may be mounted on a mounting pattern  201  formed on the board (not shown). As the board connector  200  according to the first embodiment is electrically connected to the mounting pattern  201 , a shielding force for the RF contacts  210  may be enhanced. The board connector  200  according to the first embodiment may be mounted on the mounting pattern  201  realized in various embodiments, and the embodiments of the mounting pattern  201  will be described sequentially with reference to the accompanying drawings. 
     First, as shown in  FIG.  24   , the mounting pattern  201  may be formed on the board in a shape surrounding the inner side space  230   a . For example, the mounting pattern  201  may be formed in a rectangular loop shape along an outer side of the inner side space  230   a . The ground housing  230  may be mounted on the mounting pattern  201 . When the ground housing  230  is mounted on the mounting pattern  201 , the shielding force for the RF contacts  210  may be enhanced through an electrical connection between the ground housing  230  and the mounting pattern  201 . In this case, the shielding force by the mounting pattern  201  may be realized in a form surrounding all of the contacts located in the inner side space  230   a.    
     Next, as shown in  FIG.  25   , a first mounting pattern  201   a , a second mounting pattern  201   b , a third mounting pattern  201   c , and a fourth mounting pattern  201   d  may be formed on the board. The first mounting pattern  201   a , the second mounting pattern  201   b , the third mounting pattern  201   c , and the fourth mounting pattern  201   d  may be disposed to be spaced apart from each other. The ground housing  230  may be mounted on each of the first mounting pattern  201   a , the second mounting pattern  201   b , the third mounting pattern  201   c , and the fourth mounting pattern  201   d . In this case, different shielding walls  230   b ,  230   c ,  230   d , and  230   e  included in the ground housing  230  may be mounted on the first mounting pattern  201   a , the second mounting pattern  201   b , the third mounting pattern  201   c , and the fourth mounting pattern  201   d , respectively. Accordingly, the shielding force for the RF contacts  210  may be enhanced through electrical connections between the ground housing  230  and the mounting patterns  201   a ,  201   b ,  201   c , and  201   d.    
     Next, as shown in  FIG.  26   , the first mounting pattern  201   a  and the second mounting pattern  201   b  may be formed on the board. The first mounting pattern  201   a  and the second mounting pattern  201   b  may be disposed to be spaced apart from each other along the first axial direction (X-axis direction). 
     The first ground contact  250  may be mounted on the first mounting pattern  201   a . Accordingly, a shielding force for the first RF contact  211  may be enhanced through an electrical connection between the first mounting pattern  201   a  and the first ground contact  250 . In this case, a portion of the first-first ground contact  251  and all of the first-second ground contact  252  may be mounted on the first mounting pattern  201   a . The first ground contact  250  and the ground housing  230  may also be mounted on the first mounting pattern  201   a . In this case, the third shielding wall  230   d  and the fourth shielding wall  230   e  may be mounted on the first mounting pattern  201   a . Thus, the shielding force for the first RF contact  211  may be further enhanced. The first mounting pattern  201   a  may be formed to extend parallel to the second axial direction (Y-axis direction). 
     The second ground contact  260  may be mounted on the second mounting pattern  201   b . Accordingly, a shielding force for the second RF contact  212  may be enhanced through an electrical connection between the second mounting pattern  201   b  and the second ground contact  260 . In this case, a portion of the second-first ground contact  261  and all of the second-second ground contact  262  may be mounted on the second mounting pattern  201   b . The second ground contact  260  and the ground housing  230  may also be mounted on the second mounting pattern  201   b . In this case, the third shielding wall  230   d  and the fourth shielding wall  230   e  may be mounted on the second mounting pattern  201   b . Thus, the shielding force for the second RF contact  212  may be further enhanced. The second mounting pattern  201   b  may be formed to extend parallel to the second axial direction (Y-axis direction). 
     Next, as shown in  FIG.  27   , the first mounting pattern  201   a  and the second mounting pattern  201   b  may be formed on the board. The first mounting pattern  201   a  and the second mounting pattern  201   b  may be disposed to be spaced apart from each other along the first axial direction (X-axis direction). 
     The first ground contact  250  may be mounted on the first mounting pattern  201   a . All of the first-first ground contact  251  and all of the first-second ground contact  252  may be mounted on the first mounting pattern  201   a . Accordingly, a shielding force between the first RF contact  211  and the second RF contact  212  may be enhanced through the electrical connection between the first mounting pattern  201   a  and the first ground contact  250 , and a shielding force between the first-first RF contact  211   a  and the first-second RF contact  211   b  may also be enhanced. The first ground contact  250  and the ground housing  230  may be mounted on the first mounting pattern  201   a . In this case, the first shielding wall  230   b , the third shielding wall  230   d , and the fourth shielding wall  230   e  may be mounted on the first mounting pattern  201   a . Accordingly, the shielding force between the first RF contact  211  and the second RF contact  212  and the shielding force between the first-first RF contact  211   a  and the first-second RF contact  211   b  may be further enhanced. The first mounting pattern  201   a  may be formed in a shape in which a portion extending parallel to the second axial direction (Y-axis direction) and a portion extending parallel to the first axial direction (X-axis direction) are combined. For example, the first mounting pattern  201   a  may be formed in a T-shape as a whole. 
     The second ground contact  260  may be mounted on the second mounting pattern  201   b . All of the second-first ground contact  261  and all of the second-second ground contact  262  may be mounted on the second mounting pattern  201   b . Accordingly, a shielding force between the second RF contact  212  and the first RF contact  211  may be enhanced through the electrical connection between the second mounting pattern  201   b  and the second ground contact  260 , and a shielding force between the second-first RF contact  212   a  and the second-second RF contact  212   b  may also be enhanced. The second ground contact  260  and the ground housing  230  may also be mounted on the second mounting pattern  201   b . In this case, the second shielding wall  230   c , the third shielding wall  230   d , and the fourth shielding wall  230   e  may be mounted on the second mounting pattern  201   b . Accordingly, the shielding force between the first RF contact  211  and the second RF contact  212  and the shielding force between the second-first RF contact  212   a  and the second-second RF contact  212   b  may be further enhanced. The second mounting pattern  201   b  may be formed in a shape in which a portion extending parallel to the second axial direction (Y-axis direction) and a portion extending parallel to the first axial direction (X-axis direction) are combined. For example, the second mounting pattern  201   b  may be formed in a T-shape as a whole. The second mounting pattern  201   b  and the first mounting pattern  201   a  may be formed in a shape symmetrical to each other. 
     Referring to  FIGS.  28  to  31   , the board connector  300  according to the second embodiment may be mounted on a mounting pattern  301  formed on the board (not shown). As the board connector  300  according to the second embodiment is electrically connected to the mounting pattern  301 , the shielding force for the RF contacts  310  may be enhanced. The board connector  300  according to the second embodiment may be mounted on the mounting pattern  301  realized in various embodiments, and the embodiments of the mounting pattern  301  will be described sequentially with reference to the accompanying drawings. 
     First, as shown in  FIG.  28   , the mounting pattern  301  may be formed on the board in a shape surrounding the inner side space  330   a . For example, the mounting pattern  301  may be formed in a rectangular loop shape along an outer side of the inner side space  330   a . The ground housing  330  may be mounted on the mounting pattern  301 . When the ground housing  330  is mounted on the mounting pattern  301 , a shielding force for the RF contacts  310  may be enhanced through an electrical connection between the ground housing  330  and the mounting pattern  301 . In this case, the shielding force by the mounting pattern  301  may be realized in a form surrounding all of the contacts located in the inner side space  330   a.    
     Next, as shown in  FIG.  29   , a first mounting pattern  301   a , a second mounting pattern  301   b , a third mounting pattern  301   c , and a fourth mounting pattern  301   d  may be formed on the board. The first mounting pattern  301   a , the second mounting pattern  301   b , the third mounting pattern  301   c , and the fourth mounting pattern  301   d  may be disposed to be spaced apart from each other. The ground housing  330  may be mounted on each of the first mounting pattern  301   a , the second mounting pattern  301   b , the third mounting pattern  301   c , and the fourth mounting pattern  301   d . In this case, different shielding walls  330   b ,  330   c ,  330   d , and  330   e  included in the ground housing  330  may be mounted on the first mounting pattern  301   a , the second mounting pattern  301   b , the third mounting pattern  301   c , and the fourth mounting pattern  301   d , respectively. Accordingly, the shielding force for the RF contacts  310  may be enhanced through electrical connections between the ground housing  330  and the mounting patterns  301   a ,  301   b ,  301   c , and  301   d.    
     Next, as shown in  FIG.  30   , the first mounting pattern  301   a  and the second mounting pattern  301   b  may be formed on the board. The first mounting pattern  301   a  and the second mounting pattern  301   b  may be disposed to be spaced apart from each other along the first axial direction (X-axis direction). 
     The first ground contact  350  may be mounted on the first mounting pattern  301   a . Accordingly, a shielding force for the first RF contact  311  may be enhanced through an electrical connection between the first mounting pattern  301   a  and the first ground contact  350 . In this case, all of the first ground contact  350  and a portion of the first shield bottom  333  may be mounted on the first mounting pattern  301   a . The first ground contact  350  and the ground housing  330  may also be mounted on the first mounting pattern  301   a . In this case, the third shielding wall  330   d  and the fourth shielding wall  330   e  may be mounted on the first mounting pattern  301   a . Thus, the shielding force for the first RF contact  311  may be further enhanced. The first mounting pattern  301   a  may be formed to extend parallel to the second axial direction (Y-axis direction). 
     The second ground contact  360  may be mounted on the second mounting pattern  301   b . Accordingly, a shielding force for the second RF contact  312  may be enhanced through an electrical connection between the second mounting pattern  301   b  and the second ground contact  360 . In this case, all of the second ground contact  360  and a portion of the second shield bottom  334  may be mounted on the second mounting pattern  301   b . The second ground contact  360  and the ground housing  330  may also be mounted on the second mounting pattern  301   b . In this case, the third shielding wall  330   d  and the fourth shielding wall  330   e  may be mounted on the second mounting pattern  301   b . Thus, the shielding force for the second RF contact  312  may be further enhanced. The second mounting pattern  301   b  may be formed to extend parallel to the second axial direction (Y-axis direction). 
     Next, as shown in  FIG.  31   , the first mounting pattern  301   a  and the second mounting pattern  301   b  may be formed on the board. The first mounting pattern  301   a  and the second mounting pattern  301   b  may be disposed to be spaced apart from each other along the first axial direction (X-axis direction). 
     The first ground contact  350  may be mounted on the first mounting pattern  301   a . All of the first ground contact  350  and all of the first shield bottom  333  may be mounted on the first mounting pattern  301   a . Accordingly, a shielding force between the first RF contact  311  and the second RF contact  312  may be enhanced through the electrical connection between the first mounting pattern  301   a  and the first ground contact  350 , and a shielding force between the first-first RF contact  311   a  and the first-second RF contact  311   b  may be enhanced through the electrical connection between the first mounting pattern  301   a  and the first shield bottom  333 . The first ground contact  350  and the ground housing  330  may also be mounted on the first mounting pattern  301   a . In this case, the third shielding wall  330   d  and the fourth shielding wall  330   e  may be mounted on the first mounting pattern  301   a . Thus, the shielding force between the first RF contact  311  and the second RF contact  312  and the shielding force between the first-first RF contact  311   a  and the first-second RF contact  311   b  may be further enhanced. Although not shown in the drawings, the first shielding wall  330   b , the third shielding wall  330   d , and the fourth shielding wall  330   e  may also be mounted on the first mounting pattern  301   a . The first mounting pattern  301   a  may be formed in a shape in which a portion extending parallel to the second axial direction (Y-axis direction) and a portion extending parallel to the first axial direction (X-axis direction) are combined. For example, the first mounting pattern  301   a  may be formed in a T-shape as a whole. 
     The second ground contact  360  may be mounted on the second mounting pattern  301   b . All of the second ground contact  360  and all of the second shield bottom  334  may be mounted on the second mounting pattern  301   b . Accordingly, a shielding force between the second RF contact  312  and the first RF contact  311  may be enhanced through the electrical connection between the second mounting pattern  301   b  and the second ground contact  360 , and a shielding force between the second-first RF contact  312   a  and the second-second RF contact  312   b  may be enhanced through an electrical connection between the second mounting pattern  301   b  and the second shield bottom  334 . The second ground contact  360  and the ground housing  330  may also be mounted on the second mounting pattern  301   b . In this case, the third shielding wall  330   d  and the fourth shielding wall  330   e  may be mounted on the second mounting pattern  301   b . Accordingly, the shielding force between the second RF contact  312  and the first RF contact  311  and the shielding force between the second-first RF contact  312   a  and the second-second RF contact  312   b  may be further enhanced. Although not shown in the drawings, the second shielding wall  330   c , the third shielding wall  330   d , and the fourth shielding wall  330   e  may also be mounted on the second mounting pattern  301   b . The second mounting pattern  301   b  may be formed in a shape in which a portion extending parallel to the second axial direction (Y-axis direction) and a portion extending parallel to the first axial direction (X-axis direction) are combined. For example, the second mounting pattern  301   b  may be formed in a T-shape as a whole. The second mounting pattern  301   b  and the first mounting pattern  301   a  may be formed in a shape symmetrical to each other. 
     It should be understood that the present disclosure is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and alterations can be devised by those skilled in the art to which the present disclosure pertains without departing from the technical spirit of the embodiments described herein.