Patent Description:
With the growth of wireless communication technologies, it is trend that an electronic device (e.g., a communicating electronic device) is being commonly used for daily life, and its resultant contents use is increasing in geometric progression. By a sudden increase of this contents use, a network capacity is reaching the limit gradually. As low latency data communication is demanded, high-speed wireless communication technologies such as a next-generation wireless communication technology (e.g., <NUM> communication) or wireless gigabit alliance (WIGIG) (e.g., <NUM>. 11AD), etc. are being developed.

<CIT> discloses a printed circuit board assembly including a first signal terminal row <NUM> including a plurality of first signal terminals FS<NUM>-FSn connected to a plurality of signal wirings of a flexible printed circuit board (FPCB) <NUM>, wherein a ground terminal <NUM> and terminal protrusions <NUM> of the FPCB <NUM> are connected so as to form a common ground structure.

<CIT> discloses connection structures for providing a reference potential to a flexible circuit device.

<CIT> discloses a printed circuit board layering configuration for very high bandwidth interconnect.

<CIT> discloses an electrical interconnection including a flex-circuit having a signal conductor and a shield conductor.

A communication device using an ultra high frequency band can include a printed circuit board. In one surface of the printed circuit board, at least one conductive member (e.g., a conductive pattern or conductive patch) used as an antenna radiator can be arranged and, in the other surface, a wireless communication circuit (e.g., an RF module) electrically connected to the conductive member can be mounted. For instance, the electronic device can include an electrical connection member for forwarding a high frequency RF signal from the printed circuit board of the communication device to a main printed circuit board of the electronic device. In recent years, as the electrical connection member, a flexible printed circuit board (FPCB) can be used, and as an electrical connection structure of the printed circuit board of the communication device and the flexible printed circuit board, a solder bonding structure having a relatively excellent access reliability and a relatively low price can be used.

However, in the solder bonding structure, a coupling part (e.g., a soldering possible region) of the printed circuit board and the flexible printed circuit board is arranged such that each pad is exposed out for solder bonding. Owing to this, in the coupling part, a ground shield structure for RF signal wiring may not be applied. Accordingly, in the coupling part, miss matching may occur or an unstable loss of an RF loss may occur.

Various embodiments of the disclosure can provide a communication device having a solder bonding structure, and an electronic device including the same.

According to various embodiments, the disclosure can provide a communication device having a solder bonding structure which improves miss matching between bonding parts and is configured to provide, in a coupling part, a stable loss of an RF loss, and an electronic device including the same.

According to the invention, an electronic device is provided as defined in the appended claims.

According to an unclaimed aspect, a flexible printed circuit board can include a flexible printed circuit board layer including a coupling part connected to an external circuit board and a connection part extending from the coupling part. The flexible printed circuit board layer can include first ground wiring extending from the coupling part to the connection part in a specified direction, second ground wiring extending from the coupling part to the connection part in the specified direction, signal wiring extending from the coupling part to the connection part in the specified direction, while being arranged between the first ground wiring and the second ground wiring, and third ground wiring arranged in an opposite direction to the specified direction so as to be connected, in the coupling part, to the first ground wiring and the second ground wiring and surround the signal wiring.

According to various embodiments of the disclosure, a ground shield structure is applied even to a coupling part between a printed circuit board and a flexible printed circuit board, so miss matching is improved and a stable loss of an RF loss is provided, whereby a reliability of a communication device can be guaranteed.

It should be appreciated that various embodiments of the disclosure and the terms used therein are not intended to limit the technological features set forth herein to particular embodiments.

Various embodiments, which are not part of the claimed invention, as set forth herein may be implemented as software (e.g., the program <NUM>) including one or more instructions that are stored in a storage medium (e.g., internal memory <NUM> or external memory <NUM>) that is readable by a machine (e.g., the electronic device <NUM>).

According to an embodiment, which is not part of the claimed invention, a method according to various embodiments of the disclosure may be included and provided in a computer program product.

<FIG> is a front perspective view of a mobile electronic device <NUM> according to various embodiments of the disclosure. <FIG> is a rear perspective view of the mobile electronic device <NUM> of <FIG> according to various embodiments of the disclosure.

Referring to <FIG> and <FIG>, the mobile electronic device <NUM> of an embodiment can include a housing <NUM> which includes a first surface (or front surface) 210A, a second surface (or rear surface) 210B, and a side surface 210C surrounding a space between the first surface 210A and the second surface 210B. In another embodiment (not shown), the housing can denote a structure forming a part of the first surface 210A, the second surface 210B, and the side surface 210C, of <FIG> as well. According to an embodiment, the first surface 210A can be formed by a front plate <NUM> (e.g., a glass plate including various coating layers, or a polymer plate) whose at least part is substantially transparent. The second surface 210B can be formed by a substantially opaque back plate <NUM>. The back plate <NUM> can be formed of, for example, a coated or colored glass, a ceramic, polymer, a metal (e.g., aluminum, a steel type stainless (STS) or magnesium), or a combination of at least two of the materials. The side surface 210C can be formed by a side bezel structure (or "side member") <NUM> which is combined with the front plate <NUM> and the back plate <NUM> and includes a metal and/or polymer. In some embodiment, the back plate <NUM> and the side bezel structure <NUM> can be formed integrally and include the same material (e.g., a metal material such as aluminum).

In an illustrated embodiment, the front plate <NUM> can include, at both ends of a long edge of the front plate <NUM>, two first regions 210D which are bent from the first surface 210A toward the back plate <NUM> and are extended seamlessly. In an illustrated embodiment (referring to <FIG>), the back plate <NUM> can include, at both ends of the long edge, two second regions 210E which are bent from the second surface 210B toward the front plate <NUM> and are extended seamlessly. In some embodiment, the front plate <NUM> (or the back plate <NUM>) can include only one of the first regions 210D (or the second regions 210E). In another embodiment, some of the first regions 210D or the second regions 210E may not be included. In the embodiments, when viewing from the side of the electronic device <NUM>, the side bezel structure <NUM> can have a first thickness (or width) at a side not including the first region 210D or the second region 210E, and have a second thickness thinner than the first thickness at a side including the first region 210D or the second region 210E.

In an embodiment, the electronic device <NUM> can include at least one or more of a display <NUM>, audio modules <NUM>, <NUM> and <NUM>, sensor modules <NUM>, <NUM> and <NUM>, camera modules <NUM>, <NUM> and <NUM>, a key input device <NUM>, a light emitting element <NUM>, and connector holes <NUM> and <NUM>. In some embodiment, the electronic device <NUM> can omit at least one (e.g., the key input device <NUM> or the light emitting element <NUM>) of components or additionally include another component.

The display <NUM> can be, for example, exposed through a significant portion of the front plate <NUM>. In some embodiment, at least part of the display <NUM> can be exposed through the first surface 210A and the front plate <NUM> which forms the first region 210D of the side surface 210C. In some embodiment, an edge of the display <NUM> can be formed commonly identically with an adjacent outer shape of the front plate <NUM>. In another embodiment (not shown), to extend an area in which the display <NUM> is exposed, an interval between the outer of the display <NUM> and the outer of the front plate <NUM> can be formed commonly identically.

In another embodiment (not shown), a recess or opening can be provided in a part of a screen display region of the display <NUM>, and at least one or more of the audio module <NUM>, the sensor module <NUM>, the camera module <NUM>, and the light emitting element <NUM> which are aligned with the recess or the opening can be included. In another embodiment (not shown), at least one or more of the audio module <NUM>, the sensor module <NUM>, the camera module <NUM>, the fingerprint scanning sensor <NUM>, and the light emitting element <NUM> can be included in a rear surface of the screen display region of the display <NUM>. In another embodiment (not shown), the display <NUM> can be combined with, or be arranged adjacently with, a touch sensing circuit, a pressure sensor capable of measuring a touch strength (pressure), and/or a digitizer detecting a magnetic-type stylus pen. In some embodiment, at least part of the sensor modules <NUM> and <NUM> and/or at least part of the key input device <NUM> can be arranged in the first region 210D and/or the second region 210E.

The audio modules <NUM>, <NUM> and <NUM> can include a microphone hole <NUM> and speaker holes <NUM> and <NUM>. A microphone for obtaining an external sound can be arranged within the microphone hole <NUM>. In some embodiment, a plurality of microphones can be arranged to sense the direction of sound. The speaker holes <NUM> and <NUM> can include an external speaker hole <NUM> and a call receiver hole <NUM>. In some embodiment, the speaker holes <NUM> and <NUM> and the microphone hole <NUM> can be implemented as one hole, or a speaker can be included (e.g., a piezo speaker) without the speaker holes <NUM> and <NUM>.

The sensor modules <NUM>, <NUM> and <NUM> can provide an electric signal or data value corresponding to an operational state of the electronic device <NUM> or an environmental state external to the electronic device <NUM>. The sensor modules <NUM>, <NUM> and <NUM> can, for example, include a first sensor module <NUM> (e.g., a proximity sensor) and/or a second sensor module (not shown) (e.g., a fingerprint scanning sensor) which are arranged in the first surface 210A of the housing <NUM>, and/or a third sensor module <NUM> (e.g., an HRM sensor) and/or a fourth sensor module <NUM> (e.g., a fingerprint scanning sensor) which are arranged in the second surface 210B of the housing <NUM>. The fingerprint scanning sensor can be arranged in the second surface 210B as well as the first surface 210A (e.g., the display <NUM>). The electronic device <NUM> can further include at least one of sensor modules not shown, for example, a gesture sensor, a gyro sensor, a barometer, a magnetic sensor, an acceleration sensor, a grip sensor, a color sensor, an infrared (IR) sensor, a biometric sensor, a temperature sensor, a humidity sensor, or an illuminance sensor <NUM>.

The camera modules <NUM>, <NUM> and <NUM> can include a first camera device <NUM> arranged in the first surface 210A of the electronic device <NUM>, and a second camera device <NUM> arranged in the second surface 210B, and/or a flash <NUM>. The camera modules <NUM> and <NUM> can include one or a plurality of lenses, an image sensor, and/or an image signal processor. The flash <NUM> can include, for example, a light emitting diode or a xenon lamp. In some embodiment, two or more lenses (e.g., an infrared camera, and wide-angle and telephoto lenses) and image sensors can be arranged in one surface of the electronic device <NUM>.

The key input device <NUM> can be arranged in the side surface 210C of the housing <NUM>. In another embodiment, the electronic device <NUM> may not include some, or all, of the above-mentioned key input devices <NUM>. The key input devices <NUM> not included can be implemented on the display <NUM> in another form such as a soft key, etc. In some embodiment, the key input device <NUM> can include the sensor module <NUM> arranged in the second surface 210B of the housing <NUM>.

The light emitting element <NUM> can, for example, be arranged in the first surface 210A of the housing <NUM>. The light emitting element <NUM> can, for example, provide state information of the electronic device <NUM> in a light form. In another embodiment, the light emitting element <NUM> can, for example, provide a light source interacting with an operation of the camera module <NUM>. The light emitting element <NUM> can include, for example, an LED, an IR LED and a xenon lamp.

The connector holes <NUM> and <NUM> can include a first connector hole <NUM> capable of accepting a connector (for example, a USB connector) for transmitting and/or receiving power and/or data with an external electronic device, and/or a second connector hole (for example, an earphone jack) <NUM> capable of accepting a connector for transmitting and/or receiving an audio signal with the external electronic device.

<FIG> is an exploded perspective view of a mobile electronic device of <FIG> (e.g., the mobile electronic device <NUM> of <FIG>) according to various embodiments of the disclosure.

Referring to <FIG>, the mobile electronic device <NUM> can include a side bezel structure <NUM>, a first support member <NUM> (e.g., a bracket and/or a middle plate), a front plate <NUM>, a display <NUM>, a printed circuit board <NUM> (e.g., a first printed circuit board), a battery <NUM>, a second support member <NUM> (e.g., a rear case), an antenna <NUM>, and a back plate <NUM>. In some embodiment, the electronic device <NUM> can omit at least one (e.g., the first support member <NUM> or the second support member <NUM>) of components or additionally include another component. At least one of the components of the electronic device <NUM> can be identical or similar with at least one of the components of the electronic device <NUM> of <FIG> or <FIG>, and a repeated description is omitted below.

The first support member <NUM> can be arranged within the electronic device <NUM> so as to be connected to the side bezel structure <NUM>, or can be formed integrally with the side bezel structure <NUM>. The first support member <NUM> can be formed of, for example, metal material and/or non-metal (e.g., polymer) material. The first support member <NUM> can be combined, at its one surface, with the display <NUM>, and be combined, at the other surface, with the printed circuit board <NUM>. The printed circuit board <NUM> may mount a processor, a memory, and/or an interface. The processor can include, for example, one or more of a central processing device, an application processor, a graphic processing device, an image signal processor, a sensor hub processor, or a communication processor.

The memory can include, for example, a volatile memory or a non-volatile memory.

The interface can include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and/or an audio interface. The interface can, for example, electrically or physically connect the electronic device <NUM> with an external electronic device, and can include a USB connector, an SD card / MMC connector, or an audio connector.

The battery <NUM>, a device for supplying power to at least one component of the electronic device <NUM>, can include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell. At least a portion of the battery <NUM> can, for example, be arranged on the substantially same plane as the printed circuit board <NUM>. The battery <NUM> can be arranged integrally within the electronic device <NUM>, and can be arranged detachably with the electronic device <NUM> as well.

The antenna <NUM> can be arranged between the back plate <NUM> and the battery <NUM>. The antenna <NUM> can include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. The antenna <NUM> can, for example, perform short-range communication with an external device, or can wirelessly transmit and/or receive power required for charging. In another embodiment, an antenna structure can be formed by the side bezel structure <NUM> and/or a part of the first support member <NUM> or a combination thereof.

<FIG> is a diagram illustrating an example of an electronic device <NUM> which supports <NUM> communication.

Referring to <FIG>, the electronic device <NUM> can include a housing <NUM>, a processor <NUM>, a communication module <NUM> (e.g., the communication module <NUM> of <FIG>), a first communication device <NUM>, a second communication device <NUM>, a third communication device <NUM>, a fourth communication device <NUM>, a first conductive line <NUM>, a second conductive line <NUM>, a third conductive line <NUM>, or a fourth conductive line <NUM>.

According to an embodiment, the housing <NUM> can protect other components of the electronic device <NUM>. The housing <NUM> can include, for example, a front plate, a back plate facing away from the front plate, and a side member (or metal frame) attached to the back plate or formed integrally with the back plate and surrounding a space between the front plate and the back plate.

According to an embodiment, the electronic device <NUM> can include at least one of the first communication device <NUM>, the second communication device <NUM>, the third communication device <NUM>, or the fourth communication device <NUM>.

According to an embodiment, the first communication device <NUM>, the second communication device <NUM>, the third communication device <NUM>, or the fourth communication device <NUM> can be located within the housing <NUM>. According to an embodiment, when viewing above the back plate of the electronic device, the first communication device <NUM> can be arranged at a left upper end of the electronic device <NUM>, and the second communication device <NUM> can be arranged at a right upper end of the electronic device <NUM>, and the third communication device <NUM> can be arranged at a left lower end of the electronic device <NUM>, and the fourth communication device <NUM> can be arranged at a right lower end of the electronic device <NUM>.

According to an embodiment, the processor <NUM> can include one or more of a central processing unit, an application processor, a graphic processing unit (GPU), an image signal processor of a camera, or a baseband processor (or a communication processor (CP)). According to an embodiment, the processor <NUM> can be implemented as a system on chip (SoC) or a system in package (SiP).

According to an embodiment, the communication module <NUM> can be electrically connected to the first communication device <NUM>, the second communication device <NUM>, the third communication device <NUM> or the fourth communication device <NUM>, by using the first conductive line <NUM>, the second conductive line <NUM>, the third conductive line <NUM> or the fourth conductive line <NUM>. The communication module <NUM> can include, for example, a base processor or at least one communication circuit (e.g., an intermediate frequency integrated circuit (IFIC) or a radio frequency integrated circuit (RFIC)). The communication module <NUM> can include, for example, a baseband processor separates from the processor <NUM> (e.g., an application processor (AP)). The first conductive line <NUM>, the second conductive line <NUM>, the third conductive line <NUM> or the fourth conductive line <NUM> can include, for example, a coaxial cable or an FPCB.

According to an embodiment, the communication module <NUM> can include a first baseband processor (BP) (not shown) or a second baseband processor (BP) (not shown). The electronic device <NUM> can further include one or more interfaces for supporting inter chip communication between the first BP (or the second BP) and the processor <NUM>. By using an inter chip interface (i.e., an inter processor communication channel), the processor <NUM> and the first BP or second BP can transmit and/or receive data.

According to an embodiment, the first BP or the second BP can provide an interface for performing communication with other entities. The first BP can support, for example, wireless communication for a first network (not shown). The second BP can support, for example, wireless communication for a second network (not shown).

According to an embodiment, the first BP or the second BP can form one module with the processor <NUM>. For example, the first BP or the second BP can be integrally formed with the processor <NUM>. For another example, the first BP or the second BP can be arranged within one chip, or be formed in an independent chip form. According to an embodiment, the processor <NUM> and at least one baseband processor (e.g., the first BP) can be integrally formed within one chip (SoC chip), and another baseband processor (e.g., the second BP) can be formed in an independent chip form.

According to an embodiment, the first network (not shown) or the second network (not shown) can correspond to the network <NUM> of <FIG>. According to an embodiment, each of the first network (not shown) and the second network (not shown) can include a 4th generation (<NUM>) network and a 5th generation (<NUM>) network. The <NUM> network can support, for example, a long-term evolution (LTE) protocol which is regulated in 3GPP. The <NUM> network can support, for example, a new radio (NR) protocol which is regulated in 3GPP.

<FIG> is a block diagram of a communication device <NUM> according to an embodiment.

Referring to <FIG>, the communication device <NUM> (e.g., the first communication device <NUM>, second communication device <NUM>, third communication device <NUM> or fourth communication device <NUM> of <FIG>) can include a communication circuit <NUM> (e.g., RFIC), a printed circuit board (PCB) <NUM>, a first antenna array <NUM> or a second antenna array <NUM>.

According to an embodiment, the communication circuit <NUM>, the first antenna array <NUM> or the second antenna array <NUM> can be located in the PCB <NUM>. For example, the first antenna array <NUM> or the second antenna array <NUM> can be arranged in a first surface of the PCB <NUM>, and the communication circuit <NUM> can be located in a second surface of the PCB <NUM>. The PCB <NUM> can include a connector (e.g., a coaxial cable connector or a board to board (B-to-B) connector) for electrically connecting with another PCB (e.g., a PCB having arranged the communication module <NUM> of <FIG>) by using a transmission line (e.g., the first conductive line <NUM> of <FIG> and/or a coaxial cable). The PCB <NUM> is, for example, connected, by the coaxial cable, with a PCB having arranged the communication module <NUM> by using the coaxial cable connector. The coaxial cable can be used for forwarding a transmission and reception intermediate frequency (IF) signal or radio frequency (RF) signal. In another example, a power source or other control signals can be forwarded through the B-to-B connector.

According to an embodiment, the first antenna array <NUM> or the second antenna array <NUM> can include a plurality of antennas. The antenna can include, for example, a patch antenna, a loop antenna or a dipole antenna. For example, at least some of the plurality of antennas included in the first antenna array <NUM> can be patch antennas in order to form a beam toward the back plate of the electronic device <NUM>. For another example, at least some of the plurality of antennas included in the second antenna array <NUM> can be dipole antennas or loop antennas in order to form a beam toward a side member of the electronic device <NUM>.

According to an embodiment, the communication circuit <NUM> can support at least a partial band (e.g., about <NUM> to about <NUM> or about <NUM> to about <NUM>) of a band of about <NUM> to about <NUM>. According to an embodiment, the communication circuit <NUM> can up convert or down convert a frequency. For example, the communication circuit <NUM> included in the communication device <NUM> (e.g., the first communication device <NUM> of <FIG>) can up convert an IF signal received from a communication module (e.g., the communication module <NUM> of <FIG>) through a conductive line (e.g., the first conductive line <NUM> of <FIG>), into an RF signal. For another example, the communication circuit <NUM> included in the communication device <NUM> (e.g., the first communication device <NUM> of <FIG>) can down convert an RF signal (e.g., a millimeter wave signal) received through the first antenna array <NUM> or the second antenna array <NUM>, into an IF signal, and transmit to the communication module by using the conductive line.

<FIG>, <FIG> and <FIG> are perspective views of a communication device according to various embodiments of the disclosure.

The communication device <NUM> of <FIG>, <FIG> and <FIG> can be at least in part similar with the communication device <NUM>, <NUM>, <NUM> and <NUM> of <FIG> or the communication device <NUM> of <FIG> or include other embodiments of the communication device.

Referring to <FIG>, <FIG> and <FIG>, the communication device <NUM> can include a printed circuit board <NUM>. According to an embodiment, the printed circuit board <NUM> can include a first substrate surface <NUM>, a second substrate surface <NUM> facing away from the first substrate surface <NUM>, and a substrate side surface <NUM> surrounding a space between the first substrate surface <NUM> and the second substrate surface <NUM>. According to an embodiment, the printed circuit board <NUM> can be arranged such that the second substrate surface <NUM> faces a back plate (e.g., the back plate <NUM> of <FIG>) of an electronic device (e.g., the electronic device <NUM> of <FIG>). In another embodiment, the printed circuit board <NUM> can be arranged such that the second substrate surface <NUM> of the printed circuit board <NUM> faces a side member (e.g., the side member <NUM> of <FIG>), or a front plate (e.g., the front plate <NUM> of <FIG>), of the electronic device as well.

According to various embodiments, the communication device <NUM> can include at least one of a first antenna array <NUM>, a second antenna array <NUM>, or a third antenna array <NUM>, which is arranged in the printed circuit board <NUM>. According to an embodiment, the first antenna array <NUM> can be arranged such that a beam pattern is formed in a z-axis direction through the second substrate surface <NUM> of the printed circuit board <NUM>. According to an embodiment, the second antenna array <NUM> can be arranged such that a beam pattern is formed in an x-axis direction in a first edge region (E1) of the printed circuit board <NUM>. According to an embodiment, the third antenna array <NUM> can be arranged to be adjacent with the second antenna array <NUM>, and be arranged such that a beam pattern is formed in a y-axis direction in a second edge region (E2) of the printed circuit board <NUM>.

According to various embodiments, the first antenna array <NUM> can include a plurality of first unit antennas <NUM> which are arranged at specific intervals in the second substrate surface <NUM> of the printed circuit board <NUM>. The plurality of first unit antennas <NUM> can include an antenna element which is formed with a conductive plate (e.g., a metal patch) or a conductive pattern. According to an embodiment, the second antenna array <NUM> can include a plurality of second unit antennas <NUM> which are arranged at specific intervals in the first edge region (E1) of the second substrate surface <NUM> of the printed circuit board <NUM>. According to an embodiment, the third antenna array <NUM> can include a plurality of third unit antennas <NUM> which are arranged at specific intervals in the second edge region (E2) of the second substrate surface <NUM> of the printed circuit board <NUM>.

According to various embodiments, the communication device <NUM> can include a wireless communication circuit <NUM> which is mounted in the first substrate surface <NUM> of the printed circuit board <NUM> and is electrically connected to the antenna arrays <NUM>, <NUM> and <NUM>. According to an embodiment, the wireless communication circuit <NUM> can be configured to transmit and/or receive a signal having a frequency band of a range of about <NUM> to about <NUM> through the plurality of antenna arrays <NUM>, <NUM> and <NUM>.

According to various embodiments, each of the plurality of second unit antennas <NUM> of the second antenna array <NUM> can include a first antenna (A1) and a second antenna (A2). According to an embodiment, the first antenna (A1) can include a first antenna element <NUM> and a second antenna element <NUM>. According to an embodiment, when viewing above the second substrate surface <NUM> of the printed circuit board <NUM>, the first antenna element <NUM> and the second antenna element <NUM> can be arranged to be spaced a specific interval apart in a position in which at least partial regions are mutually overlapped. According to an embodiment, the wireless communication circuit <NUM> can transmit and/or receive a vertically polarized wave through the first antenna element <NUM> and the second antenna element <NUM>. According to an embodiment, the first antenna element <NUM> and the second antenna element <NUM> can be formed in the form of a metal plate or a metal patch. According to an embodiment, the second antenna (A2) can include a third antenna element <NUM> and a fourth antenna element <NUM>. According to an embodiment, the third antenna element <NUM> and the fourth antenna element <NUM> can be arranged side by side, and be arranged in a space between the first antenna element <NUM> and the second antenna element <NUM>. According to an embodiment, the wireless communication circuit <NUM> can transmit and/or receive a horizontally polarized wave through the third antenna element <NUM> and the fourth antenna element <NUM>. According to an embodiment, the third antenna element <NUM> and the fourth antenna element <NUM> can be formed as a dipole radiator of a metal pattern form in the printed circuit board <NUM>. For instance, each of the plurality of third unit antennas <NUM> of the third antenna array <NUM> can be formed to have the same structure as the above-described second unit antenna <NUM>, too.

According to various embodiments, the communication device <NUM> can include a shield can <NUM> (or shield cover) which is arranged in a scheme of covering the wireless communication circuit <NUM> mounted in the first substrate surface <NUM> of the substrate <NUM> for the sake of noise shield. The communication device <NUM> can include at least one dielectric material <NUM> or <NUM> which is arranged to have a thickness in the first substrate surface <NUM> of the printed circuit board <NUM>. According to an embodiment, the at least one dielectric material <NUM> or <NUM> can include a first dielectric material <NUM> which is arranged in a scheme in which at least part is overlapped with the first edge region (E1) of the printed circuit board <NUM>, and a second dielectric material <NUM> which is arranged in a scheme in which at least part is overlapped with the second edge region (E2) of the printed circuit board <NUM>. According to an embodiment, the first dielectric material <NUM> and/or the second dielectric material <NUM> can be formed of the same material as the printed circuit board <NUM> or be formed of polymer material as well. For example, the first dielectric material <NUM> and/or the second dielectric material <NUM> can utilize at least one of flame retardant (FR) - <NUM>, FR-<NUM>, FR-<NUM>, FR-<NUM> or FR-<NUM> defined in the national electrical manufacturers association (NEMA). For example, the first dielectric material <NUM> and/or the second dielectric material <NUM> can utilize at least one of a composite type of laminate material bonded with a flame retardant epoxy resin (CEM) - <NUM> or a CEM-<NUM> defined in the NEMA as well. According to an embodiment, the first dielectric material <NUM> and the second dielectric material <NUM> can reduce the distortion of signals which are radiated from the second antenna array <NUM> and the third antenna array <NUM>. For instance, the first dielectric material <NUM> and the second dielectric material <NUM> can reduce a shadow region (e.g., a region where a beam pattern size is decreased) which is provided at a contact point between a front plate (e.g., the front plate <NUM> of <FIG>), and a housing (e.g., the housing <NUM> of <FIG>), of an electronic device (e.g., the electronic device <NUM> of <FIG>) having different permittivity, or between a back plate (e.g., the back plate <NUM> of <FIG>) and the housing.

According to various embodiments, the communication device <NUM> can include at least one electrical connection member for electrically connecting with a main printed circuit board (PCB) (e.g., the printed circuit board <NUM> of <FIG>) of an electronic device through at least a partial region of the printed circuit board <NUM>. According to an embodiment, the electrical connection member can be electrically connected through the first substrate surface <NUM> of the printed circuit board <NUM>. According to an embodiment, the electrical connection member can include a flexible printed circuit board (FPCB) <NUM>. According to an embodiment, the flexible printed circuit board <NUM> can be electrically connected to the printed circuit board <NUM> through solder bonding in a coupled region (region A). According to an embodiment, the solder bonding can include anisotropic conductive film (ACF) bonding, solder ball jetting bonding, hot bar bonding or auto-alignable solder adhesive (ASA) bonding.

According to various embodiments, the coupled region (region A) of the flexible printed circuit board <NUM> and the printed circuit board <NUM> shields RF signal wiring by an improved peripheral ground structure according to exemplary embodiments of the disclosure, so miss-matching caused by the peripheral exposure of the RF signal wiring, or an unstable loss of an RF loss, can be excluded.

<FIG> is a diagram illustrating a construction of a coupling part (CP1) of the printed circuit board <NUM> according to various embodiments of the disclosure. <FIG> and <FIG> are cross sections illustrating a state of solder bonding of the printed circuit board <NUM> and the flexible printed circuit board <NUM> according to various embodiments of the disclosure.

Referring to <FIG>, the printed circuit board <NUM> can include a first coupling part (CP1) for electrically connecting with a second coupling part (e.g., a second coupling part (CP2) of <FIG>) of a flexible printed circuit board (e.g., a flexible printed circuit board <NUM> of <FIG>). According to an embodiment, the printed circuit board <NUM> can include a first connection pad <NUM> exposed out in the first coupling part (CP1), a second connection pad <NUM> spaced a specific interval apart from the first connection pad <NUM> and arranged, and a third connection pad <NUM> arranged between the first connection pad <NUM> and the second connection pad <NUM>. According to an embodiment, the printed circuit board <NUM> can include a fourth connection pad <NUM> spaced a specific interval apart on the same line as the third connection pad <NUM>. According to an embodiment, the first connection pad <NUM>, the second connection pad <NUM> and the fourth connection pad <NUM> can be electrically connected to the ground of the printed circuit board <NUM>. According to an embodiment, the third connection pad <NUM> arranged between the first connection pad <NUM> and the second connection pad <NUM> can be connected to first signal wiring (e.g., first signal wiring <NUM> of <FIG>) for transmitting an RF signal, thereby being electrically connected to the wireless communication circuit <NUM>. According to an embodiment, the first coupling part (CP1) can arrange additional connection pads <NUM> and <NUM> arranged outside the first connection pad <NUM> and the second connection pad <NUM> as well. According to an embodiment, the additional connection pads <NUM> and <NUM> can be electrically connected to another signal wiring or be electrically connected to the ground as well.

Referring to <FIG>, the printed circuit board <NUM> can include a plurality of insulation layers <NUM>, <NUM> and <NUM> which are arranged to be adjacent. According to an embodiment, the printed circuit board <NUM> can include a first insulation layer <NUM>, a second insulation layer <NUM> arranged to be adjacent with the first insulation layer <NUM>, and a third insulation layer <NUM> arranged to be adjacent with the second insulation layer <NUM>. According to an embodiment, the first, second, third and fourth connection pads <NUM>, <NUM>, <NUM> and <NUM> and the additional connection pads <NUM> and <NUM> can be arranged to be exposed outside the first coupling part (CP1) of the printed circuit board <NUM> through the first insulation layer <NUM>. According to an embodiment, the printed circuit board <NUM> can include a first ground plane <NUM> arranged through the first insulation layer <NUM>, and a second ground plane <NUM> arranged through the third insulation layer <NUM>. According to an embodiment, the first, second and fourth connection pads <NUM>, <NUM> and <NUM> can be electrically connected to the first ground plane <NUM>. According to an embodiment, the first and second connection pads <NUM> and <NUM> can be electrically connected to the second ground plane <NUM> through at least one first auxiliary wiring <NUM> and at least one conductive via <NUM>.

According to various embodiments, the first signal wiring <NUM> electrically connected to the third connection pad <NUM> can be arranged through the second insulation layer <NUM>. According to an embodiment, the first signal wiring <NUM> operating as RF signal wiring can be electrically connected to the third connection pad <NUM> through a second auxiliary wiring <NUM> arranged in the first insulation layer <NUM> and a conductive via <NUM>. According to an embodiment, the first signal wiring <NUM> can be electrically connected to the wireless communication circuit <NUM> through an electrical path <NUM> arranged in the printed circuit board <NUM>.

<FIG> is a diagram illustrating a construction of a coupling part (CP2) of the flexible printed circuit board <NUM> according to various embodiments of the disclosure.

Referring to <FIG>, the flexible printed circuit board <NUM> can include a second coupling part (CP2) for coupling with a first coupling part (e.g., the first coupling part (CP1) of <FIG>) of a printed circuit board (e.g., the printed circuit board <NUM> of <FIG>), and a connection part (CP3) extended from the second coupling part (CP2). According to an embodiment, the flexible printed circuit board <NUM> can include a first access pad <NUM> exposed out in the second coupling part (CP2) and electrically connected to a first connection pad (e.g., the first connection pad <NUM> of <FIG>), a second access pad <NUM> electrically connected to a second connection pad (e.g., the second connection pad <NUM> of <FIG>), a third access pad <NUM> electrically connected to a third connection pad (e.g., the third connection pad <NUM> of <FIG>), and a fourth access pad <NUM> electrically connected to a fourth connection pad (e.g., the fourth connection pad <NUM> of <FIG>). According to an embodiment, the first access pad <NUM>, the second access pad <NUM> and the fourth access pad <NUM> can be electrically connected to ground wiring of the flexible printed circuit board <NUM>, and the third access pad <NUM> can be electrically connected to second signal wiring (e.g., the second signal wiring <NUM> of <FIG>) (e.g., RF signal wiring). According to an embodiment, the second coupling part (CP2) can include additional access pads <NUM> and <NUM> which are arranged outside the first access pad <NUM> and the second access pad <NUM> and are correspondingly connected to additional connection pads (e.g., the additional connection pads <NUM> and <NUM> of <FIG>) of a printed circuit board (e.g., the printed circuit board <NUM> of <FIG>).

<FIG> is a cross section viewed along line B-B' of <FIG> according to various embodiments of the disclosure. <FIG> is a cross section viewed along line C-C' of <FIG> according to various embodiments of the disclosure. <FIG> is a cross section viewed along line D-D' of <FIG> according to various embodiments of the disclosure.

Referring to <FIG>, the flexible printed circuit board <NUM> can include a plurality of insulation layers <NUM>, <NUM> and <NUM> which are arranged to be adjacent. According to an embodiment, the flexible printed circuit board <NUM> can include a fourth insulation layer <NUM>, a fifth insulation layer <NUM> arranged to be adjacent with the fourth insulation layer <NUM>, and a sixth insulation layer <NUM> arranged to be adjacent with the fifth insulation layer <NUM>. According to an embodiment, the flexible printed circuit board <NUM> can include a third ground plane <NUM> arranged through the fourth insulation layer <NUM>, and a fourth ground plane <NUM> arranged through the sixth insulation layer <NUM>. According to an embodiment, in the second coupling part (CP2), the first, second, third and fourth access pads <NUM>, <NUM>, <NUM> and <NUM> and the additional access pads <NUM> and <NUM> can be arranged to be exposed through the fifth insulation layer <NUM> having excluded the fourth insulation layer <NUM>. According to an embodiment, the first access pad <NUM> can be electrically connected to first ground wiring <NUM> which is extended to the connection part (CP3) through the fifth insulation layer <NUM>. According to an embodiment, the second access pad <NUM> can be electrically connected to second ground wiring <NUM> which is extended to the connection part (CP3) through the fifth insulation layer <NUM>. According to an embodiment, the third access pad <NUM> can be electrically connected to second signal wiring <NUM> (e.g., RF signal wiring) which is extended to the connection part (CP2) through the fifth insulation layer <NUM>. According to an embodiment, the fourth access pad <NUM> can be electrically connected to the fourth ground plane <NUM>, through third auxiliary wiring <NUM> arranged through the fifth insulation layer <NUM> and a conductive via <NUM>.

<FIG> and <FIG> are cross sections illustrating a state of solder bonding of the printed circuit board <NUM> and the flexible printed circuit board <NUM> according to various embodiments of the disclosure.

Referring to <FIG> and <FIG>, the first coupling part (CP1) of the printed circuit board <NUM> and the second coupling part (CP2) of the flexible printed circuit board <NUM> can be electrically connected by solder bonding. In this case, the first, second, third and fourth connection pads <NUM>, <NUM>, <NUM> and <NUM>, and the additional connection pads <NUM> and <NUM>, of the printed circuit board <NUM> can be connected to physically get in contact with the first, second, third and fourth access pads <NUM>, <NUM>, <NUM> and <NUM>, and the additional access pads <NUM> and <NUM>, of the flexible printed circuit board <NUM>. According to an embodiment, the first signal wiring <NUM> arranged through the second insulation layer <NUM> of the printed circuit board <NUM> can be electrically connected to the third connection pad <NUM>, through the second auxiliary wiring <NUM> arranged through the first insulation layer <NUM> and the conductive via <NUM>. According to an embodiment, the third connection pad <NUM> can be electrically connected to the third access pad <NUM> of the flexible printed circuit board <NUM>. According to an embodiment, the third access pad <NUM> can be electrically connected to the second signal wiring <NUM> which is arranged through the fifth insulation layer <NUM> of the flexible printed circuit board <NUM>.

According to various embodiments, the fourth connection pad <NUM> electrically connected to the first ground plane <NUM> of the printed circuit board <NUM> can be electrically connected to the fourth access pad <NUM> of the flexible printed circuit board <NUM>, whereby a second ground path (∘,<NUM>) can be formed. According to an embodiment, the fourth access pad <NUM> can be electrically connected to the fourth ground plane <NUM>, through the third auxiliary wiring <NUM> arranged through the fifth insulation layer <NUM> of the flexible printed circuit board <NUM> and the conductive via <NUM>. According to an embodiment, the second ground plane <NUM> can be extended to and arranged in at least partial region of the first coupling part (CP1) in the third insulation layer <NUM>, and can be electrically connected to the first connection pad <NUM> and/or the second connection pad <NUM>, through at least one first auxiliary wiring <NUM> and the conductive via <NUM>. According to an embodiment, the first connection pad <NUM> and/or the second connection pad <NUM> can be connected to the first access pad <NUM>, and/or the second access pad <NUM>, of the flexible printed circuit board <NUM>. According to an embodiment, the first access pad <NUM> and/or the second access pad <NUM> can be electrically connected to the first ground wiring <NUM> and/or the second ground wiring <NUM> which are arranged through the fifth insulation layer <NUM>. According to an embodiment, the first ground wiring <NUM> and/or the second ground wiring <NUM> can be electrically connected to the third ground plane <NUM> through at least one conductive via <NUM>, whereby a first ground path (∘,<NUM>) can be formed. According to various embodiments, a return path of an RF signal can be formed identically with the directions of the ground paths (∘,<NUM>, ∘,<NUM>).

Accordingly, the first signal wiring <NUM> and the second signal wiring <NUM> electrically connected in the first coupling part (CP1) of the printed circuit board <NUM> and the second coupling part (CP2) of the flexible printed circuit board <NUM> arrange, at left and right sides, the first ground wiring <NUM> and the second ground wiring <NUM>, and arrange, at a lower side, ground wiring connected by the first insulation layer <NUM>, the third auxiliary wiring <NUM> and the fourth ground plane <NUM>, and are surrounded, at an upper side, by ground wiring connected by the second ground plane <NUM>, the first auxiliary wiring <NUM>, the first ground plane <NUM> and the third ground plane <NUM>, whereby a ground shield structure can be implemented.

<FIG> is a graph comparing an insertion loss dependent on the existence or non-existence of a ground structure of a coupling part according to various embodiments of the disclosure.

Referring to <FIG>, it can be appreciated that an insertion loss (e.g., an RF loss) in a state where the above-described ground structure has been applied is more smoothly varied than an insertion loss in a state where the ground structure has not been applied. In detail, a loss value (S11) of about (-) <NUM> dB is shown at a point <NUM> in a state where the ground structure has been applied, whereas a loss value of about (-) <NUM> dB can be identified at a point <NUM> (for example, a frequency corresponding to the point <NUM>) in a state where the ground structure has not been applied. This can mean a rate between a magnitude of a signal inputted through the coupling part of various embodiments and a magnitude of a signal outputted, and can mean that the insertion loss is relatively stably varied, as the insertion loss value in the state where the ground structure has been applied shows as a smaller value relatively in a (-) direction according to an exemplary embodiment of the disclosure.

A flexible printed circuit board <NUM> of <FIG>, <FIG> and <FIG> can be at least in part similar with the flexible printed circuit board <NUM> of <FIG>, <FIG>, <FIG> and <FIG> or include other embodiments of the flexible printed circuit board.

In describing the flexible printed circuit board <NUM> of <FIG>, <FIG> and <FIG>, the same components of the above-described flexible printed circuit board (e.g., the flexible printed circuit board <NUM> of <FIG>, <FIG> and <FIG> and <FIG>) have used the same symbols, and their detailed description can be omitted.

Referring to <FIG>, <FIG> and <FIG>, in the flexible printed circuit board <NUM>, the first, second, third and fourth access pads <NUM>, <NUM>, <NUM> and <NUM> and the additional access pads <NUM> and <NUM> can be arranged in the fourth insulation layer <NUM>. In this case, the third access pad <NUM> can be electrically connected to the fourth auxiliary wiring <NUM> arranged through the fourth insulation layer <NUM>, and the fourth auxiliary wiring <NUM> can be electrically connected, through the conductive via <NUM>, to the second signal wiring <NUM> arranged in the fifth insulation layer <NUM>. According to an embodiment, the fourth access pad <NUM> can be also electrically connected to the fifth auxiliary wiring <NUM> arranged in the fourth insulation layer <NUM>. According to an embodiment, the fifth auxiliary wiring <NUM> can be electrically connected to the fourth ground plane <NUM> arranged in the sixth insulation layer <NUM>, through the sixth auxiliary wiring <NUM> arranged in the fifth insulation layer <NUM> and at least one conductive via <NUM>.

According to various embodiments, as a spaced distance (d) between the fourth auxiliary wiring <NUM> electrically connected to the second signal wiring <NUM> and arranged in the fourth insulation layer <NUM> and the fourth ground plane <NUM> is secured in the second coupling part (CP2), it can be more advantageous to impedance matching.

<FIG> and <FIG> are cross sections illustrating a state of solder bonding of a printed circuit board and a flexible printed circuit board according to various embodiments of the disclosure.

The flexible printed circuit board <NUM> of <FIG> and <FIG> can be at least in part similar with the flexible printed circuit board <NUM> of <FIG>, <FIG> and <FIG> and <FIG> or include other embodiments of the flexible printed circuit board.

Referring to <FIG> and <FIG>, the first coupling part (CP1) of the printed circuit board <NUM> and the second coupling part (CP2) of the flexible printed circuit board <NUM> can be electrically connected by solder bonding. In this case, the first, second, third and fourth connection pads <NUM>, <NUM>, <NUM> and <NUM>, and the additional connection pads <NUM> and <NUM>, of the printed circuit board <NUM> can physically get in contact with the first, second, third and fourth access pads <NUM>, <NUM>, <NUM> and <NUM>, and the additional access pads <NUM> and <NUM>, of the flexible printed circuit board <NUM>. According to an embodiment, the first signal wiring <NUM> arranged through the second insulation layer <NUM> of the printed circuit board <NUM> can be electrically connected to the third connection pad <NUM>, through the second auxiliary wiring <NUM> arranged through the first insulation layer <NUM> and the conductive via <NUM>. According to an embodiment, the third connection pad <NUM> can be electrically connected to the third access pad <NUM> of the flexible printed circuit board <NUM>. According to an embodiment, the third access pad <NUM> can be electrically connected to the fourth auxiliary wiring <NUM> arranged through the fourth insulation layer <NUM> of the flexible printed circuit board <NUM>. According to an embodiment, the fourth auxiliary wiring <NUM> arranged in the fourth insulation layer <NUM> can be electrically connected, through a conductive via <NUM>, to the second signal wiring <NUM> arranged in the fifth insulation layer <NUM>.

According to various embodiments, the fourth connection pad <NUM> electrically connected to the first ground plane <NUM> of the printed circuit board <NUM> can be electrically connected to the fourth access pad <NUM> of the flexible printed circuit board <NUM>. According to an embodiment, the fourth access pad <NUM> can be electrically connected to the fourth ground plane <NUM> arranged in the sixth insulation layer <NUM>, through the fifth auxiliary wiring <NUM>, the sixth auxiliary wiring <NUM> and a conductive via <NUM> which are arranged through the fourth insulation layer <NUM>, and the fifth insulation layer <NUM>, of the flexible printed circuit board <NUM>. According to an embodiment, the second ground plane <NUM> can be extended to and arranged in at least partial region of the first coupling part (CP1) in the third insulation layer <NUM>, and can be electrically connected to the first connection pad <NUM> and/or the second connection pad <NUM> through at least one first auxiliary wiring <NUM> and the conductive via <NUM>. According to an embodiment, the first connection pad <NUM> and/or the second connection pad <NUM> can be electrically connected to the first ground wiring <NUM> and/or the second ground wiring <NUM> which are arranged through the fourth insulation layer <NUM> of the flexible printed circuit board <NUM>. According to an embodiment, the first ground wiring <NUM> and/or the second ground wiring <NUM> can be electrically connected to the third ground plane <NUM> through at least one conductive via <NUM>.

Accordingly, the first signal wiring <NUM> and the second signal wiring <NUM> electrically connected in the first coupling part (CP1) of the printed circuit board <NUM> and the second coupling part (CP2) of the flexible printed circuit board <NUM> arrange, at left and right sides, the first ground wiring <NUM> and the second ground wiring <NUM>, and are surrounded, at a lower side, by ground wiring connected by the first ground plane <NUM>, the fifth auxiliary wiring <NUM>, the sixth auxiliary wiring <NUM> and the fourth ground plane <NUM>, whereby a ground shield structure can be implemented.

According to various embodiments, an electronic device (e.g., the electronic device <NUM> of <FIG>) can include a circuit element (e.g., the wireless communication circuit <NUM> of <FIG>), a printed circuit board (e.g., the printed circuit board <NUM> of <FIG>) including a first connection pad (e.g., the first connection pad <NUM> of <FIG>) connected to the ground of the electronic device, a second connection pad (the second connection pad <NUM> of <FIG>), and a third connection pad (e.g., the third connection pad <NUM> of <FIG>) arranged between the first connection pad and the second connection pad and connected to a signal terminal of the circuit element, and a flexible printed circuit board (FPCB) (e.g., the flexible printed circuit board of <FIG>) including a coupling part (e.g., the coupling part (CP2) of <FIG>) connected to the printed circuit board, and a connection part (e.g., the connection part (CP3) of <FIG>) extending from the coupling part. The flexible printed circuit board can include first ground wiring (e.g., the first ground wiring <NUM> of <FIG>) connected to the first connection pad and extending from the coupling part to the connection part in a specified direction, second ground wiring (e.g., the second ground wiring <NUM> of <FIG>) connected to the second connection pad and extending from the coupling part to the connection part in the specified direction, signal wiring (e.g., the second signal wiring <NUM> of <FIG>) connected to the third connection pad and extending from the coupling part to the connection part in the specified direction, while being arranged between the first ground wiring and the second ground wiring, and third ground wiring (e.g., the third auxiliary wiring <NUM> of <FIG>) arranged in an opposite direction to the specified direction so as to be connected, in the coupling part, to the first ground wiring and the second ground wiring and surround the signal wiring.

According to various embodiments, the printed circuit board can include a first insulation layer (e.g., the first insulation layer <NUM> of <FIG>), a second insulation layer (e.g., the second insulation layer <NUM> of <FIG>) arranged to be adjacent with the first insulation layer, and a third insulation layer (e.g., the third insulation layer <NUM> of <FIG>) arranged to be adjacent with the second insulation layer. The third connection pad can be electrically connected to the signal wiring (e.g., the first signal wiring <NUM> of <FIG>) arranged through the second insulation layer.

According to various embodiments, the first connection pad, the second connection pad and the third connection pad can be arranged to be exposed out through the first insulation layer.

According to various embodiments, the electronic device can include a first ground plane (e.g., the first ground plane <NUM> of <FIG>) arranged in the first insulation layer, and a second ground plane (e.g., the second ground plane <NUM> of <FIG>) arranged in the third insulation layer. The first connection pad and the second connection pad can be electrically connected to at least one of the first ground plane and/or the second ground plane.

According to various embodiments, the electronic device can further include a fourth connection pad (e.g., the fourth connection pad <NUM> of <FIG>) arranged near the third connection pad, and the fourth connection pad can be electrically connected to the first ground plane.

According to various embodiments, the flexible printed circuit board can include a fourth insulation layer (e.g., the fourth insulation layer <NUM> of <FIG>), a fifth insulation layer (e.g., the fifth insulation layer <NUM> of <FIG>) which is arranged to be adjacent with the fourth insulation layer, and in which the fourth insulation layer is not arranged in at least partial region corresponding to the coupling part, and a sixth insulation layer (e.g., the sixth insulation layer <NUM> of <FIG>) arranged to be adjacent with the fifth insulation layer. At least part of the first ground wiring, the second ground wiring, the signal wiring and the third ground wiring can be exposed through the partial region of the fifth insulation layer.

According to various embodiments, the electronic device can include a first access pad (e.g., the first access pad <NUM> of <FIG>) electrically connected to the first ground wiring, arranged to be exposed through the partial region of the fifth insulation layer, a second access pad (the second access pad <NUM> of <FIG>) electrically connected to the second ground wiring, a third access pad (the third access pad <NUM> of <FIG>) electrically connected to the signal wiring, and a fourth access pad (the fourth access pad <NUM> of <FIG>) electrically connected to the third ground wiring.

According to various embodiments, the fourth access pad can be arranged in a position corresponding to the fourth connection pad.

According to various embodiments, the electronic device can include a third ground plane (e.g., the third ground plane <NUM> of <FIG>) arranged in the fourth insulation layer, and a fourth ground plane (e.g., the fourth ground plane <NUM> of <FIG>) arranged in the sixth insulation layer. At least part of the third ground wiring can be electrically connected to the fourth ground plane.

According to various embodiments, the third ground wiring can be electrically connected to the fourth ground plane through a conductive via (the conductive via <NUM> of <FIG>).

According to various embodiments, while the printed circuit board and the flexible printed circuit board are coupled, at least one of the second ground plane or the fourth ground plane can be extended to and arranged in at least part of the coupling part.

According to various embodiments, the flexible printed circuit board can include a fourth insulation layer, a fifth insulation layer arranged to be adjacent with the fourth insulation layer, and a sixth insulation layer arranged to be adjacent with the fifth insulation layer. At least part of the first ground wiring, the second ground wiring, the signal wiring and the third ground wiring can be exposed to a region corresponding to the coupling part of the fourth insulation layer.

According to various embodiments, the flexible printed circuit board can be solder bonded such that at least part of the first ground wiring of the coupling part, the second ground wiring and the signal wiring corresponds to the first connection pad of the printed circuit board, the second connection pad, and the third connection pad.

According to various embodiments, the solder bonding can include anisotropic conductive film (ACF) bonding, solder ball jetting bonding, hot bar bonding, or auto-alignable solder adhesive (ASA) bonding.

According to various embodiments, the printed circuit board can include at least one antenna electrically connected to the circuit element. The circuit element can be configured to transmit and/or receive a signal having a frequency of a range of <NUM> to <NUM> through the at least one antenna.

According to various embodiments, a flexible printed circuit board (e.g., the flexible printed circuit board <NUM> of <FIG>) can include a flexible printed circuit board layer including a coupling part (e.g., the second coupling part (CP2) of <FIG>) connected to an external circuit board (e.g., the printed circuit board <NUM> of <FIG>) and a connection part (e.g., the connection part (CP3) of <FIG>) extending from the coupling part. The flexible printed circuit board layer can include first ground wiring (the first ground wiring <NUM> of <FIG>) extending from the coupling part to the connection part in a specified direction, second ground wiring (the second ground wiring <NUM> of <FIG>) extending from the coupling part to the connection part in the specified direction, signal wiring (the second signal wiring <NUM> of <FIG>) extending from the coupling part to the connection part in the specified direction, while being arranged between the first ground wiring and the second ground wiring, and third ground wiring (the third auxiliary wiring of <FIG>) arranged in an opposite direction to the specified direction so as to be connected, in the coupling part, to the first ground wiring and the second ground wiring and surround the signal wiring.

According to various embodiments, the flexible printed circuit board can include a first insulation layer, a second insulation layer arranged to be adjacent with the first insulation layer, and a third insulation layer arranged to be adjacent with the second insulation layer.

According to various embodiments, the fourth insulation layer is not arranged in at least partial region of the second insulation layer corresponding to the coupling part, and at least part of the first ground wiring, the second ground wiring, the signal wiring and the third ground wiring can be exposed through the at least partial region of the second insulation layer.

According to various embodiments, at least part of the first ground wiring, the second ground wiring, the signal wiring and the third ground wiring can be exposed through a region corresponding to the coupling part of the first insulation layer.

Claim 1:
An electronic device (<NUM>) comprising:
a circuit element;
a printed circuit board (<NUM>) comprising a first connection pad (<NUM>) connected to the ground of the electronic device (<NUM>), a second connection pad (<NUM>), a third connection pad (<NUM>) arranged between the first connection pad (<NUM>) and the second connection pad (<NUM>) and connected to a signal terminal of the circuit element and a fourth connection pad (<NUM>) connected to the ground and spaced apart from the third connection pad (<NUM>) in a same line, wherein the circuit element is mounted on the printed circuit board (<NUM>) that comprises at least one antenna electrically connected to the circuit element; and
a flexible printed circuit board, FPCB, (<NUM>) comprising a coupling part (CP2) connected to the printed circuit board and a connection part (CP3) extending from the coupling part (CP2),
wherein the FPCB (<NUM>) comprises:
first ground wiring (<NUM>) connected to the first connection pad (<NUM>) via a first access pad (<NUM>) and extending from the coupling part (CP2) to the connection part (CP3) in a specified direction;
second ground wiring (<NUM>) connected to the second connection pad (<NUM>) via a second access pad (<NUM>) and extending from the coupling part (CP2) to the connection part (CP3) in the specified direction;
signal wiring (<NUM>) connected to the third connection pad (<NUM>) via a third access pad (<NUM>) and extending from the coupling part (CP2) to the connection part (CP3) in the specified direction, while being arranged between the first ground wiring (<NUM>) and the second ground wiring (<NUM>); and
third ground wiring (<NUM>) connected to the fourth connection pad (<NUM>) via a fourth access pad (<NUM>) and extending from the coupling part (CP2) to the connection part (CP3) in the specified direction, while being arranged between the first ground wiring (<NUM>) and the second ground wiring (<NUM>);
wherein the third access pad (<NUM>) is spaced apart from and surrounded by the first access pad (<NUM>), the second access pad (<NUM>), and the fourth access pad (<NUM>) in the coupling part (CP2).