Patent Publication Number: US-2023155280-A1

Title: Structure for reducing interference between antennas and electronic device comprising the same

Description:
TECHNICAL FIELD 
     Certain embodiments disclosed in the disclosure relate to a technique for reducing interference between antennas. 
     BACKGROUND ART 
     Electronic devices may include a plurality of antennas. For example, electronic devices may form beams using the plurality of antennas. 
     DISCLOSURE OF THE INVENTION 
     Technical Problem 
     Interference between antennas may occur when a plurality of antennas are arranged in an electronic device. For example, in a frequency band of less than 1 GHz with omni-directionality, interference between antennas occurs and thus reduces the total radiated power (TRP). 
     Certain embodiments disclosed in the disclosure may provide a structure for reducing interference between antennas and a method associated therewith. 
     Technical Solution 
     In certain embodiment, an electronic device comprises a display facing a first direction; a back plate facing a second direction substantially opposite to the first direction; a support member disposed below the display and configured to be coupled with the display; a printed circuit board disposed between the support member and the back plate; and a first antenna and a second antenna disposed between the printed circuit board and the back plate and configured to emit signals in a radio frequency band, wherein the first antenna is electrically connectable to a first ground region included in the printed circuit board, and wherein the second antenna is electrically connectable to a second ground region included in the support member. 
     In certain embodiments, an electronic device comprises a display facing a first direction; a back plate facing a second direction substantially opposite to the first direction; a support member disposed below the display and configured to be coupled with the display; a printed circuit board disposed between the support member and the back plate; and a first antenna and a second antenna disposed between the printed circuit board and the back plate and configured to emit signals in a radio frequency band, wherein the first antenna is electrically connectable to a first ground region included in the printed circuit board, and the second antenna is electrically connectable to a second ground region included in the display. 
     Advantageous Effects 
     According to certain embodiments disclosed in the disclosure, interference between a plurality of antennas included in an electronic device may be reduced. 
     According to certain embodiments disclosed in the disclosure, interference between a plurality of antennas may be reduced while maintaining the performance of operating modes supported by the electronic device. 
     Additional advantages may be realized, either directly, or indirectly from the disclosure. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a block diagram illustrating an electronic device in a network environment according to certain embodiments. 
         FIG.  2    is an exploded perspective view illustrating an electronic device according to certain embodiments. 
         FIG.  3    illustrates a plurality of antennas connected to ground regions according to certain embodiments. 
         FIG.  4    illustrates a display and a support member according to certain embodiments. 
         FIG.  5    illustrates an example of a support member including a plurality of ground regions. 
         FIG.  6    illustrates another example of a support member including a plurality of ground regions. 
         FIG.  7    illustrates an example of a plurality of antennas connected to a plurality of ground regions via switches. 
         FIG.  8    illustrates another example of a plurality of antennas connected to a plurality of ground regions via switches. 
         FIG.  9    is a flowchart illustrating operations of an electronic device that performs switching according to certain embodiments. 
     
    
    
     With respect to the description of the drawings, the same or similar reference signs may be used for the same or similar elements. 
     MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, certain embodiments disclosed in the disclosure will be described with reference to the accompanying drawings. However, this is not intended to limit the present disclosure to the specific embodiments, and it is to be construed to include various modifications, equivalents, and/or alternatives of embodiments of the present disclosure. 
       FIG.  1    is a block diagram illustrating an electronic device  101  in a network environment  100  according to certain embodiments. Referring to  FIG.  1   , the electronic device  101  in the network environment  100  may communicate with an electronic device  102  via a first network  198  (e.g., a short-range wireless communication network), or an electronic device  104  or a server  108  via a second network  199  (e.g., a long-range wireless communication network). According to an embodiment, the electronic device  101  may communicate with the electronic device  104  via the server  108 . According to an embodiment, the electronic device  101  may include a processor  120 , memory  130 , an input device  150 , a sound output device  155 , a display device  160 , an audio module  170 , a sensor module  176 , an interface  177 , a haptic module  179 , a camera module  180 , a power management module  188 , a battery  189 , a communication module  190 , a subscriber identification module(SIM)  196 , or an antenna module  197 . In some embodiments, at least one (e.g., the display device  160  or the camera module  180 ) of the components may be omitted from the electronic device  101 , or one or more other components may be added in the electronic device  101 . In some embodiments, some of the components may be implemented as single integrated circuitry. For example, the sensor module  176  (e.g., a fingerprint sensor, an iris sensor, or an illuminance sensor) may be implemented as embedded in the display device  160  (e.g., a display). 
     The processor  120  may execute, for example, software (e.g., a program  140 ) to control at least one other component (e.g., a hardware or software component) of the electronic device  101  coupled with the processor  120 , and may perform various data processing or computation. According to one embodiment, as at least part of the data processing or computation, the processor  120  may load a command or data received from another component (e.g., the sensor module  176  or the communication module  190 ) in volatile memory  132 , process the command or the data stored in the volatile memory  132 , and store resulting data in non-volatile memory  134 . According to an embodiment, the processor  120  may include a main processor  121  (e.g., a central processing unit (CPU) or an application processor (AP)), and an auxiliary processor  123  (e.g., a graphics processing unit (GPU), an image signal processor (ISP), a sensor hub processor, or a communication processor (CP)) that is operable independently from, or in conjunction with, the main processor  121 . Additionally or alternatively, the auxiliary processor  123  may be adapted to consume less power than the main processor  121 , or to be specific to a specified function. The auxiliary processor  123  may be implemented as separate from, or as part of the main processor  121 . 
     The auxiliary processor  123  may control at least some of functions or states related to at least one component (e.g., the display device  160 , the sensor module  176 , or the communication module  190 ) among the components of the electronic device  101 , instead of the main processor  121  while the main processor  121  is in an inactive (e.g., sleep) state, or together with the main processor  121  while the main processor  121  is in an active state (e.g., executing an application). According to an embodiment, the auxiliary processor  123  (e.g., an image signal processor or a communication processor) may be implemented as part of another component (e.g., the camera module  180  or the communication module  190 ) functionally related to the auxiliary processor  123 . 
     The memory  130  may store various data used by at least one component (e.g., the processor  120  or the sensor module  176 ) of the electronic device  101 . The various data may include, for example, software (e.g., the program  140 ) and input data or output data for a command related thereto. The memory  130  may include the volatile memory  132  or the non-volatile memory  134 . 
     The program  140  may be stored in the memory  130  as software, and may include, for example, an operating system (OS)  142 , middleware  144 , or an application  146 . 
     The input device  150  may receive a command or data to be used by other component (e.g., the processor  120 ) of the electronic device  101 , from the outside (e.g., a user) of the electronic device  101 . The input device  150  may include, for example, a microphone, a mouse, a keyboard, or a digital pen (e.g., a stylus pen). 
     The sound output device  155  may output sound signals to the outside of the electronic device  101 . The sound output device  155  may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as playing multimedia or playing record, and the receiver may be used for an incoming calls. According to an embodiment, the receiver may be implemented as separate from, or as part of the speaker. 
     The display device  160  may visually provide information to the outside (e.g., a user) of the electronic device  101 . The display device  160  may include, for example, a display, a hologram device, or a projector and control circuitry to control a corresponding one of the display, hologram device, and projector. According to an embodiment, the display device  160  may include touch circuitry adapted to detect a touch, or sensor circuitry (e.g., a pressure sensor) adapted to measure the intensity of force incurred by the touch. 
     The audio module  170  may convert a sound into an electrical signal and vice versa. According to an embodiment, the audio module  170  may obtain the sound via the input device  150 , or output the sound via the sound output device  155  or a headphone of an external electronic device (e.g., an electronic device  102 ) directly (e.g., wiredly) or wirelessly coupled with the electronic device  101 . 
     The sensor module  176  may detect an operational state (e.g., power or temperature) of the electronic device  101  or an environmental state (e.g., a state of a user) external to the electronic device  101 , and then generate an electrical signal or data value corresponding to the detected state. According to an embodiment, the sensor module  176  may include, for example, a gesture sensor, a gyro sensor, an atmospheric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor. 
     The interface  177  may support one or more specified protocols to be used for the electronic device  101  to be coupled with the external electronic device (e.g., the electronic device  102 ) directly (e.g., wiredly) or wirelessly. According to an embodiment, the interface  177  may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, a secure digital (SD) card interface, or an audio interface. 
     A connecting terminal  178  may include a connector via which the electronic device  101  may be physically connected with the external electronic device (e.g., the electronic device  102 ). According to an embodiment, the connecting terminal  178  may include, for example, a HDMI connector, a USB connector, a SD card connector, or an audio connector (e.g., a headphone connector). 
     The haptic module  179  may convert an electrical signal into a mechanical stimulus (e.g., a vibration or a movement) or electrical stimulus which may be recognized by a user via his tactile sensation or kinesthetic sensation. According to an embodiment, the haptic module  179  may include, for example, a motor, a piezoelectric element, or an electric stimulator. 
     The camera module  180  may capture a still image or moving images. According to an embodiment, the camera module  180  may include one or more lenses, image sensors, image signal processors, or flashes. 
     The power management module  188  may manage power supplied to the electronic device  101 . According to one embodiment, the power management module  188  may be implemented as at least part of, for example, a power management integrated circuit (PMIC). 
     The battery  189  may supply power to at least one component of the electronic device  101 . According to an embodiment, the battery  189  may include, for example, a primary cell which is not rechargeable, a secondary cell which is rechargeable, or a fuel cell. 
     The communication module  190  may support establishing a direct (e.g., wired) communication channel or a wireless communication channel between the electronic device  101  and the external electronic device (e.g., the electronic device  102 , the electronic device  104 , or the server  108 ) and performing communication via the established communication channel. The communication module  190  may include one or more communication processors that are operable independently from the processor  120  (e.g., the application processor (AP)) and supports a direct (e.g., wired) communication or a wireless communication. According to an embodiment, the communication module  190  may include a wireless communication module  192  (e.g., a cellular communication module, a short-range wireless communication module, or a global navigation satellite system (GNSS) communication module) or a wired communication module  194  (e.g., a local area network (LAN) communication module or a power line communication (PLC) module). A corresponding one of these communication modules may communicate with the external electronic device via the first network  198  (e.g., a short-range communication network, such as Bluetooth™, wireless-fidelity (Wi-Fi) direct, or infrared data association (IrDA)) or the second network  199  (e.g., a long-range communication network, such as a cellular network, the Internet, or a computer network (e.g., LAN or wide area network (WAN)). These various types of communication modules may be implemented as a single component (e.g., a single chip), or may be implemented as multi components (e.g., multi chips) separate from each other. The wireless communication module  192  may identify and authenticate the electronic device  101  in a communication network, such as the first network  198  or the second network  199 , using subscriber information (e.g., international mobile subscriber identity (IMSI)) stored in the subscriber identification module  196 . 
     The antenna module  197  may transmit or receive a signal or power to or from the outside (e.g., the external electronic device) of the electronic device  101 . According to an embodiment, the antenna module  197  may include an antenna including a radiating element composed of a conductive material or a conductive pattern formed in or on a substrate (e.g., PCB). According to an embodiment, the antenna module  197  may include a plurality of antennas. In such a case, at least one antenna appropriate for a communication scheme used in the communication network, such as the first network  198  or the second network  199 , may be selected, for example, by the communication module  190  (e.g., the wireless communication module  192 ) from the plurality of antennas. The signal or the power may then be transmitted or received between the communication module  190  and the external electronic device via the selected at least one antenna. According to an embodiment, another component (e.g., a radio frequency integrated circuit (RFIC)) other than the radiating element may be additionally formed as part of the antenna module  197 . 
     At least some of the above-described components may be coupled mutually and communicate signals (e.g., commands or data) therebetween via an inter-peripheral communication scheme (e.g., a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)). 
     According to an embodiment, commands or data may be transmitted or received between the electronic device  101  and the external electronic device  104  via the server  108  coupled with the second network  199 . Each of the electronic devices  102  and  104  may be a device of a same type as, or a different type, from the electronic device  101 . According to an embodiment, all or some of operations to be executed at the electronic device  101  may be executed at one or more of the external electronic devices  102 ,  104 , or  108 . For example, if the electronic device  101  should perform a function or a service automatically, or in response to a request from a user or another device, the electronic device  101 , instead of, or in addition to, executing the function or the service, may request the one or more external electronic devices to perform at least part of the function or the service. The one or more external electronic devices receiving the request may perform the at least part of the function or the service requested, or an additional function or an additional service related to the request, and transfer an outcome of the performing to the electronic device  101 . The electronic device  101  may provide the outcome, with or without further processing of the outcome, as at least part of a reply to the request. To that end, a cloud computing, distributed computing, or client-server computing technology may be used, for example. 
     The electronic device of  FIG.  1    may include multiple antennas. For example, the wireless communication module  192  may include an antenna for accessing a cellular network, and another antenna for Bluetooth. Additionally, the electronic device  100  may include an array of antennas for forming a beam. In the case, where the electronic device is compact, such as a smartphone, the multiple antennas may be in close proximity to each other. 
     A structure for reducing interference between the multiple antennas will be shown below.  FIG.  2    describes, among other things, a first antenna module  250 , a second antenna module  260 , a printed circuit board  240 , a support member  230 , and a display  210 .  FIG.  3    describes a first antenna  350  connected to a ground region of the printed circuit board  240  and a second antenna  360  connected to a ground region of the support member  230  or a ground region of the display  210 . 
     For example, in the case where the ground region of the display  210  is used,  FIG.  4   , illustrates a display  210  including a glass region  410  and a metal region  420  and a support member  230  including a metal region  440  and a non-conductive region  430 . The second antenna  360  can be connected to either the metal region  420  of the display  210  or the metal region  420  of the support member  230 .  FIGS.  5  and  6    describe the support structure in more detail. 
     In certain embodiments, the first antenna  350  and the second antenna  360  can be electrically connectable to the same or different grounds via a switch as shown in  FIGS.  7  and  8   , based on the various operations.  FIG.  9    is a flow chart describing the switching operations. 
       FIG.  2    is an exploded perspective view  200  of the electronic device  101  according to certain embodiments. 
     Referring to  FIG.  2   , the electronic device  101  may include a display  210  (e.g., at least a part of the display device  160  of  FIG.  1   ), a back plate  220  (or back cover), a support member  230 , a first printed circuit board (PCB)  240 , a second printed circuit board  245 , a first antenna module  250 , and a second antenna module  260 . 
     The first antenna module  250  may include an antenna and the second antenna module  260  may include another antenna. The antenna of the first antenna module  250  and the antenna of the second antenna module  260  may either receive the same symbols in the same frequency band to reduce Signal to Noise Ratio (SNR). Alternatively, the antennas can receive different symbols in the same band to increase throughput. 
     Interference between the antenna of the first antenna module  250  and the antenna of the second antenna module  260  is mitigated, if not eliminated by connection of the antennas to different ground regions. For example, the antenna of the first antenna module  250  can be connected to a ground region of the PCB  240 , while the antenna of the second antenna module  260  can be connected to a ground region of the support member. 
     According to an embodiment, the display  210  may be disposed such that a surface on which a screen is output faces a first direction (e.g., +z-axis). Examples of the display  210  may include a liquid crystal display (LCD) or organic light emitting diode (OLED). The display  210  may include touch sensing circuitry, a pressure sensor capable of measuring the intensity (pressure) of the touch, a biometric sensor capable of recognizing biometric information on a user (e.g., fingerprint), and/or a digitizer detecting a magnetic field type stylus pen. The display  210  may be referred to as a display unit, a display module, or a display device. 
     According to an embodiment, the back plate  220  may be disposed below the display  210  (e.g., −z-axis direction). 
     According to an embodiment, the support member  230  may be formed of, for example, a metal material and/or a non-metal (e.g., polymer) material. The support member  230  may be referred to as a bracket. The support member  230  may be disposed between the display  210  and the back plate  220 . For example, one surface of the support member  230  facing the first direction (e.g., +z-axis) may be coupled with the display  210 , and the other surface of the support member  230  facing the second direction (e.g., −z-axis) may be coupled with the first printed circuit board  240  and the second printed circuit board  245 . 
     According to an embodiment, the first printed circuit board  240  may be referred to as a main PCB. The first printed circuit board  240  may include components capable of executing various functions of the electronic device  101 . Examples of the first printed circuit board  240  may include the components illustrated in  FIG.  1    (e.g., the processor  120 , the memory  130 , the wireless communication module  192 , and/or the interface  177 ). 
     According to an embodiment, the second printed circuit board  245  may be referred to as a sub PCB. The second printed circuit board  245  may be mounted at a different height from the first printed circuit board  240  based on the z-axis direction. For example, the second printed circuit board  245  is disposed at a higher position than the first printed circuit board  240  from the back plate  220  in the z-axis direction, and may be further spaced apart from an antenna pattern included in the second antenna module  260  than the first printed circuit board  240  in the z-axis direction. According to another embodiment, the electronic device  101  may not include the second printed circuit board  245 . The first printed circuit board  240  may be electrically connected to the second printed circuit board  245  via a flexible PCB (FPCB)  247  and a coaxial cable  248 . 
     According to an embodiment, the first antenna module  250  and the second antenna module  260  may perform the same or similar functions as the antenna module  197  of  FIG.  1   . The first antenna module  250  and the second antenna module  260  may include antennas capable of emitting signals in a radio frequency band. The antennas may be electrically connected to a feeding part and the ground region. 
     The first antenna and the second antenna of the electronic device  101  according to certain embodiments may be electrically connected to different ground regions. For example, the first antenna and the second antenna may be electrically connected to two different ground regions, among the ground regions included in the first printed circuit board  240 , the ground region included in the support member  230 , and the ground region included in the display  210 . Connecting the first antenna and the second antenna to two different ground regions may prevent interference between the antennas in a specific frequency band. 
       FIG.  3    illustrates a plurality of antennas  350  and  360  connected to grounds regions  310 ,  320 , and  330  according to certain embodiments. In the embodiments described below, the meaning of “connected to/with” may mean physically or electrically connected. “Electrically connectable” means either electrically connected or capable of electrical connection by a switch, such as selectively connected. 
     Referring to  FIG.  3   , the electronic device  101  may emit signals in the same or different frequency bands via the first antenna  350  (e.g., a part of the first antenna module  250  in  FIG.  2   ) and the second antenna  360  (e.g., a part of the second antenna module  260  in  FIG.  2   ). For example, if the electronic device  101  receives the same data (or the same symbol) using the first antenna  350  and the second antenna  360 , the number of paths via which the data is transmitted increases, and thus the robustness of the channel and the received signal noise ratio (SNR) may increase (e.g., diversity). In addition, if the electronic device  101  simultaneously receives a plurality of different items of data (or symbols) using the first antenna  350  and the second antenna  360 , data throughput may increase (e.g., MIMO or spatial multiplexing). 
     According to an embodiment, the first antenna  350  and the second antenna  360  may be a planar inverted F antenna (PIFA). For example, a first portion  352  of the first antenna  350  and a first portion  362  of the second antenna  360  are connected to feeding parts (not illustrated) of the first printed circuit board  240  and the second printed circuit board  245 , respectively, and a second portion  354  of the first antenna  350  and a second portion  364  of the second antenna  360  may be connected to ground regions, respectively. 
     According to an embodiment, the first antenna  350  and the second antenna  360  may be connected to different ground regions. For example, the first antenna  350  (or the second portion  354 ) may be connected to the ground region  310  —included in the first printed circuit board  240 . The second antenna  360  (or the second portion  364 ) may be connected to the ground region  320 —included in the support member  230 . Since a beam pattern may be changed if the first antenna  350  and the second antenna  360  are connected to different grounds, an envelope correlation coefficient (ECC) between antennas may be improved. 
       FIG.  3    illustrates an embodiment in which the first antenna  350  is connected to the ground region  310  of the printed circuit board  240  and the second antenna  360  is connected to the ground region  320  of the support member  230 , but according to other embodiments, the first antenna  350  may be connected to the ground region  310  of the printed circuit board  240  and the second antenna  360  may be connected to the ground region  330  included in the display  210 . 
     In certain embodiments, the second antenna  360  can be connected to metal regions of the display  210  or support member  230 . 
       FIG.  4    illustrates the display  210  and the support member  230  according to certain embodiments. 
     Referring to  FIG.  4   , the display  210  may include a glass region  410  and a metal region  420 . At least a part of the metal region  420  may be used as the third ground region  330  of the display  210  of  FIG.  3   . 
     According to an embodiment, the support member  230  may include a non-conductive region  430  and a metal region  440 . The non-conductive region  430  may be, for example, an injection region of a polymer material. The metal region  440  may be used as the ground region  320  of the support member  230  of  FIG.  3   . 
     According to an embodiment, the metal region  420  of the display  210  and the metal region  440  of the support member  230  may be electrically separated or insulated from each other. For example, an insulating material such as coating or tape may be disposed between the metal region  420  of the display  210  and the metal region  440  of the support member  230 . 
     In certain embodiments, the first antenna  350  and the second antenna  360  can be connected to different metal regions of the support member  230  that are electrically separated or insulated from each other. 
       FIGS.  5  and  6    illustrate the support member  230  including a plurality of ground regions according to certain embodiments. 
     Referring to  FIG.  5   , the metal region  440  of the support member (e.g.,  230  of  FIG.  4   ) may be separated into a first metal region  440 - 1  and a second metal region  440 - 2  through an insulating material  510 . For example, the metal region  440  may be separated in the right-left direction (e.g., the x-axis direction) as illustrated by the reference numeral  501 , or may be separated in the up-down direction (e.g., the y-axis direction) as illustrated by the reference numeral  502 . 
     The first metal region  440 - 1  and the second metal region  440 - 2  may each be used as electrically separated ground regions. The first metal region  440 - 1  and the second metal region  440 - 2  can be different ground regions. 
     According to embodiments, the first antenna  350  may be connected to the first metal region  440 - 1 , and the second antenna  360  may be connected to the second metal region  440 - 2 . According to another embodiment, the first antenna  350  may be connected to the ground region  310  of the printed circuit board  240  of the PCB  240  or the ground region  330  of the display, and the second antenna  360  may be connected to the first metal region  440 - 1  or the second metal region  440 - 2 . 
       FIGS.  3  to  5    illustrate an embodiment in which two different antennas  350  and  360  are connected to different ground regions, but the number of antennas included in the electronic device  101  and used for diversity operation or MIMO operation may be three or more. In this case, the metal region  440  of the support member  230  may be separated into three or more. For example, referring to the reference number  600  of  FIG.  6   , the metal region  440  may be separated into the first metal region  440 - 1 , the second metal region  440 - 2 , and the third metal region  440 - 3  through a insulating material  610 - 1  and a insulating material  610 - 2 .  FIG.  6    illustrates the embodiment in which the metal regions  440  are separated in the right-left direction (e.g., the x-axis direction), but the metal region  440  may be separated in the up-down direction (e.g., the y-axis direction) by the same principle. 
       FIGS.  7  and  8    illustrate a plurality of antennas  350  and  360  connected to a plurality of ground regions  310 ,  320 , and  330  via switches according to certain embodiments. 
     Referring to  FIG.  7   , the second antenna  360  may be selectively connected to a plurality of ground regions via a switch. For example, the second portion  364  of the second antenna  360  may be connected to a first switch  370 , and the first switch  370  may be selectively connected to the ground region  310  of the printed circuit board  240  and the ground region  320  of the support member  230 . If the second antenna  360  is connected to the ground region  310  of the printed circuit board  240  via the first switch  370 , the second antenna  360  is connected to the same ground region as the first antenna  350 , and thus the antenna gain may increase. On the other hand, if the second antenna  360  is connected to the ground region  320  of the support member  230  via the first switch  370 , the ground regions of the second antenna  360  and the first antenna  350  are electrically separated, and thus the ECC may be improved. The electronic device  101  according to certain embodiments may control the first switch such that the second antenna  360  is connected to the ground region  310  of the printed circuit board  240  when an operation (e.g., diversity) in which antenna gain is preferentially required is used, and the second antenna  360  is connected to the second ground region  320  of the support member  230  when an operation (e.g., MIMO operation) requiring improvement of the ECC is used. 
       FIG.  7    illustrates an embodiment in which the second antenna  360  is connected to the ground region  310  of the printed circuit board  240  or the ground region  320  of the support member  230 ; however, according to another embodiment, the second antenna  360  may be selectively connected to the ground region  310  of the printed circuit board  240  and the ground region  330  of the display  210  via the first switch  370 . 
       FIG.  7    illustrates an embodiment in which the first antenna  350  and the second antenna  360  may be commonly connected to the ground region  310  of the printed circuit board  240 , but the first antenna  350  and the second antenna  360  may be commonly connected to the ground region  320  of the support member  230  or the ground region  330  of the display  210 . 
     Referring to  FIG.  8   , the first antenna  350  as well as the second antenna  360  may be selectively connected to a plurality of ground regions via a second switch  380 . In this case, a part of the second switch  380  may be connected to the ground region  310  of the printed circuit board  240  and another part may be connected to a ground region different from the ground region to which the second antenna  360  is connected. For example, the first antenna  350  may be electrically connectable to the ground region  310  of the printed circuit board  240  and the ground region  320  of the support member  230  via the second switch  380 , and the second antenna  360  may be electrically connectable to the ground region  310  of the printed circuit board  240  and the ground region  330  of the display  210  via the first switch  370 . For another example, the first antenna  350  may be electrically connectable to the ground region  310  of the printed circuit board  240  and the ground region  320  of the support member  230  via the second switch  380 , and the second antenna  360  may be electrically connectable to the second ground region  320  of the support member  230  and the ground region  330  of the display  210  via the first switch  370 . For yet another example, the first antenna  350  may be electrically connectable to the ground region  310  of the printed circuit board  240  and the ground region  330  of the display  210  via the second switch  380 , and the second antenna  360  may be electrically connectable to the ground region  320  of the support member  230  and the ground region  330  of the display  210  via the first switch  370 . 
       FIG.  9    is a flowchart  900  of operations of the electronic device  101  that performs switching according to certain embodiments. 
     The operations illustrated in  FIG.  9    may be performed by the electronic device  101  or may be performed by components included in the electronic device  101 . For example, a wireless communication circuit included in the first printed circuit board  240  and configured to perform wireless communication may perform the operations of  FIG.  9   . The wireless communication circuit may be, for example, at least a part of the wireless communication module  192  of  FIG.  1    or a communication processor (CP). 
     Referring to  FIG.  9   , in operation  905 , the electronic device  101  may identify an operation mode of the electronic device  101 . Examples of the operation mode may include a diversity mode or a MIMO mode. In operation  910 , the electronic device  101  may identify whether or not the identified operation mode is a MIMO mode. 
     If the operation mode is the MIMO mode, in operation  915 , the wireless communication circuit may perform switching such that ground regions of the first antenna (e.g., the first antenna  350  of  FIG.  3   ) and the second antenna (e.g., the second antenna  360  of  FIG.  3   ) are separated. For example, if the first antenna and the second antenna are electrically connected to the first ground region (e.g., the ground region  310  of the printed circuit board  240  of  FIG.  3   ), the wireless communication circuit may control the switch (the first switch  370  of  FIG.  7   ) of the second antenna such that the second antenna  360  is disconnected from the ground region  310  and electrically connected to the second ground region (e.g., the ground region  320  of the support member  230  of  FIG.  3   ) or the third ground region (e.g., the third ground region  330  of the display  210  of  FIG.  3   ) which is electrically separated from the first ground region. For another example, if the first antenna and the second antenna are electrically connectable to different ground regions, the wireless communication circuit may not control the switch of the second antenna. 
     If the operation mode is not a MIMO mode, in operation  920 , the wireless communication circuit may perform switching such that the ground regions electrically connected to the first antenna and the second antenna are the same. For example, if the first antenna is electrically connected to the first ground region and the second antenna is electrically connected to the second ground region or the third ground region, the wireless communication circuit may control the switch of the second antenna such that the second antenna is electrically connected to the first ground region and disconnected from the second ground region/third ground region. For another example, if the first antenna and the second antenna are electrically connected to the first ground region, the wireless communication circuit might not control the switch of the second antenna. For another example, if the first antenna is electrically connected to the second ground region and the second antenna is separated from the third ground region, the wireless communication circuit may control both the switch (e.g., the second switch  380  of  FIG.  8   ) of the first antenna and the switch of the second antenna such that the first antenna and the second antenna are electrically connected to the first ground region. 
       FIG.  9    illustrates an embodiment in which the first antenna and the second antenna are electrically connected to the same ground region or different ground regions according to the operation mode; however, according to another embodiment, the wireless communication circuit may switch the first antenna and the second antenna based on information (e.g., a lookup table) stored in the memory (e.g., the memory  130  of  FIG.  1   ) of the electronic device  101 . For example, the wireless communication circuit may identify the ECC between antennas, corresponding to the frequency bands, which are being communicated, with the look-up table, and, if the ECC is equal to or greater than a specified threshold, may perform switching such that the ground regions of the first antenna and the second antenna are separated. If the ECC is less than the specified threshold, the wireless communication circuit may perform switching such that the ground regions of the first antenna and the second antenna are the same. 
     According to an embodiment, the wireless communication circuit may further perform operation  925  before performing operation  905 . In operation  925 , the wireless communication circuit may identify a frequency band being used. If the frequency band is within a specified range based on a specified frequency band (e.g., 1 GHz), the wireless communication circuit may perform operation  905 . If the frequency band is out of the specified range based on the specified frequency band, the wireless communication circuit may end the algorithm without performing operation  905 . 
     As described above, an electronic device (e.g., the electronic device  101  of  FIG.  1   ) according to certain embodiments may include a display (e.g., the display  210  of  FIG.  2   ) facing a first direction, a back plate (e.g., the back plate  220  of  FIG.  2   ) facing a second direction substantially opposite to the first direction, a support member (e.g., the support member  230  of  FIG.  2   ) disposed below the display and configured to be coupled with the display, a printed circuit board (e.g., the printed circuit board  245  in  FIG.  2   ) disposed between the support member and the back plate, and a first antenna (e.g., the first antenna  350  in  FIG.  3   ) and a second antenna (e.g., the second antenna  360  in  FIG.  3   ) disposed between the printed circuit board and the back plate and configured to emit signals in a radio frequency band. The first antenna may be electrically connectable to a first ground region (e.g., the first ground region  310  of the printed circuit board  240  of  FIG.  3   ) included in the printed circuit board and the second antenna may be electrically connectable to a second ground region (e.g., the second ground region  320  of the support member  230  of  FIG.  3   ) included in the support member. 
     According to an embodiment, the first antenna and the second antenna may have a shape of a planar inverted F antenna (PIFA). 
     According to an embodiment, the electronic device may further include a first switch electrically connected to the second antenna, and the first switch (e.g., the first switch  370  of  FIG.  7   ) may be electrically connected to the second ground region and the first ground region. 
     According to an embodiment, the electronic device may further include a second switch (e.g., the second switch  380  of  FIG.  8   ) electrically connected to the first antenna, and the second switch may be electrically connected to the first ground region and a third ground region (e.g., the ground region  330  of the display  210  of  FIG.  3   ) included in the display. 
     According to an embodiment, the electronic device may further include a processor (e.g., the processor  120  of  FIG.  1   ) operatively connected to the first switch and the second switch, and the processor may be configured to identify an operation mode of the electronic device, to control the first switch and the second switch such that the first antenna and the second antenna are electrically connected to different ground regions if the operation mode is a multi-input multi-output (MIMO) mode, and to control the first switch and the second switch such that the first antenna and the second antenna are electrically connected to the first ground region if the operation mode is a diversity mode. 
     According to an embodiment, the processor may be configured to identify a frequency band being used by the electronic device, and to identify the operation mode of the electronic device if the frequency band is within a specified frequency range. 
     According to an embodiment, the specified frequency range may include a frequency band of 1 gigahertz (GHz). 
     According to an embodiment, the second ground region may include a metal region (e.g., the first metal region  440 - 1  of  FIG.  5   ) and a metal region (e.g., the second metal region  440 - 2  of  FIG.  5   ), which are electrically separated. 
     According to an embodiment, the support member may further include an insulating material provided to electrically separate the metal region and the metal region. 
     According to an embodiment, the display may include a liquid crystal display (LCD) and the support member may include a bracket. 
     As described above, an electronic device (e.g., the electronic device  101  of  FIG.  1   ) according to certain embodiments may include a display (e.g., the display  210  of  FIG.  2   ) facing a first direction, a back plate (e.g., the back plate  220  of  FIG.  2   ) facing a second direction substantially opposite to the first direction, a support member (e.g., the support member  230  of  FIG.  2   ) disposed below the display and configured to be couplable with the display, a printed circuit board (e.g., the printed circuit board  245  in  FIG.  2   ) disposed between the support member and the back plate, a first antenna (e.g., the first antenna  350  in  FIG.  3   ) and a second antenna (e.g., the second antenna  360  in  FIG.  3   ) disposed between the printed circuit board and the back plate and configured to emit signals in a radio frequency band, and the first antenna may be electrically connectable—to a first ground region (e.g., the first ground region  310  of the printed circuit board  240  of  FIG.  3   ) included in the printed circuit board and the second antenna may be electrically connectable to a second ground region (e.g., the third ground region  330  of the display  210  of  FIG.  3   ) included in the display. 
     According to an embodiment, the first antenna and the second antenna may have a shape of a PIFA. 
     According to an embodiment, the electronic device may further include a first switch (e.g., the first switch  370  of  FIG.  7   ) electrically connected to the second antenna, and the first switch may be electrically connected to the second ground region and the first ground region. 
     According to an embodiment, the electronic device may further include a second switch (e.g., the second switch  380  of  FIG.  8   ) electrically connected to the first antenna, and the second switch may be electrically connected to a third ground region (e.g., the second ground region  320  of the support member  230  of  FIG.  3   ) included in the support member. 
     According to an embodiment, the electronic device may further include a processor (e.g., the processor  120  of  FIG.  1   ) operatively connected to the first switch and the second switch, and the processor may be configured to identify the operation mode of the electronic device and to control the first switch and the second switch such that the first antenna and the second antenna are electrically connected to different ground regions of the first ground region, the second ground region, and the third ground region if the operation mode is the MIMO mode, and to control the first switch and the second switch such that the first antenna and the second antenna are electrically connected to the first ground region if the operation mode is the diversity mode. 
     According to an embodiment, the processor may be configured to identify a frequency band being used by the electronic device, and to identify the operation mode of the electronic device if the frequency band is within a specified frequency range. 
     According to an embodiment, the specified frequency range may include a frequency band of 1 GHz. 
     According to an embodiment, the third ground region may include a metal region—(e.g., the first metal region  440 - 1  of  FIG.  5   ) and a metal region (e.g., the second metal region  440 - 2  of  FIG.  5   ), which are electrically separated. 
     According to an embodiment, the support member may further include an insulating material provided to electrically separate the first metal region  440 - 1  and the second metal region  440 - 2 . 
     According to an embodiment, the display may include an LCD, and the support member may include a bracket. 
     The electronic device according to certain embodiments may be one of various types of electronic devices. The electronic devices may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance. According to an embodiment of the disclosure, the electronic devices are not limited to those described above. 
     It should be appreciated that certain embodiments of the present disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments and include various changes, equivalents, or replacements for a corresponding embodiment. With regard to the description of the drawings, similar reference numerals may be used to refer to similar or related elements. It is to be understood that a singular form of a noun corresponding to an item may include one or more of the things, unless the relevant context clearly indicates otherwise. As used herein, each of such phrases as “A or B, ” “at least one of A and B, ” “at least one of A or B,” “A, B, or C, ” “at least one of A, B, and C, ” and “at least one of A, B, or C,” may include any one of, or all possible combinations of the items enumerated together in a corresponding one of the phrases. As used herein, such terms as “ 1 st” and “ 2 nd, ” or “first” and “second” may be used to simply distinguish a corresponding component from another, and does not limit the components in other aspect (e.g., importance or order). It is to be understood that if an element (e.g., a first element) is referred to, with or without the term “operatively” or “communicatively”, as “coupled with,” “coupled to,” 0  “connected with,” or “connected to” another element (e.g., a second element), it means that the element may be coupled with the other element directly (e.g., wiredly), wirelessly, or via a third element. 
     As used herein, the term “module” may include a unit implemented in hardware, software, or firmware, and may interchangeably be used with other terms, for example, “logic, ” “logic block,” “part, ” or “circuitry”. A module may be a single integral component, or a minimum unit or part thereof, adapted to perform one or more functions. For example, according to an embodiment, the module may be implemented in a form of an application-specific integrated circuit (ASIC). 
     Certain embodiments as set forth herein may be implemented as software (e.g., the program  140 ) including one or more instructions that are stored in a storage medium (e.g., internal memory  136  or external memory  138 ) that is readable by a machine (e.g., the electronic device  101 ). For example, a processor (e.g., the processor  120 ) of the machine (e.g., the electronic device  101 ) may invoke at least one of the one or more instructions stored in the storage medium, and execute it, with or without using one or more other components under the control of the processor. This allows the machine to be operated to perform at least one function according to the at least one instruction invoked. The one or more instructions may include a code generated by a compiler or a code executable by an interpreter. The machine-readable storage medium may be provided in the form of a non-transitory storage medium. Wherein, the term “non-transitory” simply means that the storage medium is a tangible device, and does not include a signal (e.g., an electromagnetic wave), but this term does not differentiate between where data is semi-permanently stored in the storage medium and where the data is temporarily stored in the storage medium. 
     According to an embodiment, a method according to certain embodiments of the disclosure may be included and provided in a computer program product. The computer program product may be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or be distributed (e.g., downloaded or uploaded) online via an application store (e.g., PlayStore™), or between two user devices (e.g., smart phones) directly. If distributed online, at least part of the computer program product may be temporarily generated or at least temporarily stored in the machine-readable storage medium, such as memory of the manufacturer&#39;s server, a server of the application store, or a relay server. 
     According to certain embodiments, each component (e.g., a module or a program) of the above-described components may include a single entity or multiple entities. According to certain embodiments, one or more of the above-described components may be omitted, or one or more other components may be added. Alternatively or additionally, a plurality of components (e.g., modules or programs) may be integrated into a single component. In such a case, according to certain embodiments, the integrated component may still perform one or more functions of each of the plurality of components in the same or similar manner as they are performed by a corresponding one of the plurality of components before the integration. According to certain embodiments, operations performed by the module, the program, or another component may be carried out sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be executed in a different order or omitted, or one or more other operations may be added.