ELECTRONIC DEVICE INCLUDING MULTIPLE PCBS AND ANTENNAS PRINTED ON PCBS

An electronic device is provided. The electronic device includes a housing including a first plate facing a first direction and a second plate facing a second direction opposite to the first direction, and forming a space between the first plate and the second plate, a display disposed inside the housing and exposed through the first plate, a first printed circuit board disposed between the display and the second plate, a second printed circuit board disposed between the display and the second plate, a third printed circuit board which is disposed between the display and the second plate and electrically connects the first printed circuit board and the second printed circuit board, and a first antenna coupled to the first printed circuit board, wherein the third printed circuit board may include a second antenna electrically connected to the first antenna.

BACKGROUND

The disclosure relates to an electronic device including a conductive pattern printed on a printed circuit board (PCB).

2. Description of Related Art

Recently, electronic devices are becoming smaller and thinner. Accordingly, a mounting space inside an electronic device is becoming narrower.

Depending on the presence or absence of flexibility, a printed circuit board may be classified into a flexible printed circuit board (FPCB) manufactured using a flexible material, or a rigid printed circuit board (rigid PCB, (R)PCB).

In general, along with the increase in the distribution rate of portable electronic devices (e.g., smartphones), the direction of utilization has also been developed into various fields, and magnetic secure transmission (MST) technology has attracted attention as an example of such utilization. When the MST technology is applied to an electronic device, the electronic device is capable of being used not only for purposes such as basic functions such as call, video/music playback, and route guidance available in the existing electronic devices, but also for purposes such as payment of a prepaid/postpaid traffic charge, credit card payment, an electronic bankbook, and/or identification.

SUMMARY

An antenna for MST wireless communication may be received in an internal space of an electronic device. The greater the inductance of a coil included in the antenna, the greater the strength of magnetic flux, which makes it easy to secure radiation performance. However, the fact that the coil is required to be received in a limited space of the electronic device and the fact that the greater the inductance is, the relatively greater the internal resistance is, which may make the strength of magnetic flux weaker, are becoming limitations in increasing the inductance. In addition, for space utilization, a mounting position of the antenna may be limited to a part of the electronic device. In this case, in the case of an antenna for short-distance wireless communication such as MST communication, a recognition area of the antenna may be limited according to a mounting position of the antenna.

In accordance with an aspect of the disclosure, an electronic device is provided. The electronic device includes a housing which includes a first plate facing a first direction and a second plate facing a second direction opposite to the first direction, and forms a space between the first plate and the second plate, a display disposed inside the housing and exposed through the first plate, a first printed circuit board disposed between the display and the second plate, a second printed circuit board disposed between the display and the second plate, a third printed circuit board which is disposed between the display and the second plate and electrically connects the first printed circuit board and the second printed circuit board, and a first antenna coupled to the first printed circuit board, wherein the third printed circuit board includes a second antenna electrically connected to the first antenna.

According to various embodiments, the performance of an antenna can be improved by expanding a recognition area of the antenna. According to various embodiments, the space efficiency can be provided by increasing the performance of an antenna by using a limited mounting space.

DETAILED DESCRIPTION

FIG.1is a block diagram illustrating an electronic device101in a network environment100according to an embodiment of the disclosure.

The camera module180may capture a still image or moving images.

According to an embodiment, the camera module180may include one or more lenses, image sensors, image signal processors, or flashes.

FIG.2is an exploded perspective view of the electronic device101according to an embodiment of the disclosure.

FIG.3is an exploded perspective view of the electronic device101according to an embodiment of the disclosure.

FIG.4is a cross-sectional side view of the electronic device101according to an embodiment of the disclosure.

Unlike the exploded perspective view ofFIG.2,FIG.3may be an exploded perspective view in which the components of the electronic device101are separated.FIG.4may illustrate a cross section corresponding to one of planes parallel to the Z-axis and the Y-axis of the electronic device101ofFIGS.2and3.

Referring toFIG.2, the electronic device101may include a housing20. According to an embodiment, the electronic device101may include a first plate21facing in a first direction (e.g., the opposite direction of the Z-axis) and a second plate22facing in a second direction (e.g., the Z-axis direction). According to an embodiment, a display23may be exposed to the outside of the housing20through a space included in the first plate21. The housing20may refer to, for example, a space formed by coupling the first plate21and the second plate22. According to an embodiment, the components of the electronic device101, such as a plurality of printed circuit boards (e.g., a first printed circuit board210, a second printed circuit board220, and a third printed circuit board230), may be disposed inside the housing20. According to an embodiment, the plurality of printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) may be disposed in a space (e.g., inside the housing20) between the display23and the second plate22.

According to various embodiments, the electronic device101may include the plurality of printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) inside the housing20. According to an embodiment, the electronic device101may include the plurality of printed circuit boards at least including the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230. According to an embodiment, the plurality of printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) may be electrically connected to each other. According to various embodiments, the plurality of printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) may be disposed in each area inside the housing20. Each area inside the housing20may refer to an area on a plane formed by the X-axis and the Y-axis ofFIG.2. For example, the printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) may have a flat plate shape or a shape similar to a flat plate, and areas in which the printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) are disposed may be understood as being planar. In addition, each of areas in which the plurality of printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) are disposed may be understood as corresponding to an area of the second plate22. According to an embodiment, each area inside the housing20may be understood as each area (e.g., a first area and a second area) corresponding to the second plate22. According to an embodiment, the plurality of printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) may be arranged to overlap separated different areas (e.g., a first area or a second area). According to an embodiment, the first printed circuit board210may be arranged to overlap a first area formed on an upper end (an upper end with reference to the Y-axis direction ofFIG.2) of the second plate22. According to an embodiment, the second printed circuit board220may be disposed to at least include an area (e.g., a second area) spaced apart from the first printed circuit board210. According to an embodiment, the second printed circuit board220may be arranged to overlap an area including at least a part of a second area, which is an area of the second plate22excluding the first area. According to an embodiment, the first printed circuit board210and the second printed circuit board220may be arranged to be separated from each other. According to various embodiments, the third printed circuit board230may connect the first printed circuit board210and the second printed circuit board220. According to an embodiment, the third printed circuit board230may form a physical and/or electrical connection with the first printed circuit board210. According to an embodiment, the third printed circuit board230may form a physical and/or electrical connection with the second printed circuit board220. According to an embodiment, the first printed circuit board210and the second printed circuit board220may be connected to each other through the third printed circuit board230. According to an embodiment, the third printed circuit board230may be arranged to overlap at least a part of the second area.

According to various embodiments, the printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) may be bases on which various components of the electronic device101are stacked. The printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) may be made of various materials. For example, some of the plurality of printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) may be made of a flexible material such as polyimide (PI) or polyethylene terephthalate. According to an embodiment, the third printed circuit board230may be a flexible printed circuit board (e.g., a flexible printed circuit board (FPCB)) including a flexible material. According to an embodiment, the first printed circuit board210and the second printed circuit board220may be rigid printed circuit boards (RPCBs).

According to various embodiments, the components of the electronic device101may be coupled to the plurality of printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230). According to an embodiment, the components of the electronic device101coupled to the printed circuit boards (e.g., the first printed circuit board210, the second printed circuit board220, and the third printed circuit board230) may form an electrical connection with the printed circuit boards.

According to an embodiment, a processor (e.g., the processor120of FIG. 1) and/or a memory (e.g., the memory130ofFIG.1) may be coupled to the first printed circuit board210.

The processor (e.g., the processor120ofFIG.1) may include, for example, at least one of a central processing unit (e.g., the main processor121ofFIG.1), an application processor (e.g., the main processor121ofFIG.1), a graphics processing unit (e.g., the auxiliary processor123ofFIG.1), an image signal processor (e.g., the auxiliary processor123ofFIG.1), a sensor hub processor (e.g., the auxiliary processor123ofFIG.1), or a communication processor (e.g., the auxiliary processor123ofFIG.1).

The memory (e.g., the memory130ofFIG.1) may include, for example, a volatile memory (e.g., the volatile memory132ofFIG.1) and/or a non-volatile memory (e.g., the non-volatile memory134ofFIG.1).

According to an embodiment, an interface (e.g., the interface177and the connection terminal178ofFIG.1) and/or a main antenna (not shown) may be mounted on the second printed circuit board220.

The interface may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, and/or an audio interface. For example, the interface may electrically or physically connect the electronic device101to an external electronic device (e.g., the external electronic device102ofFIG.1), and include a USB connector, an SD card/multimedia card (MMC) connector, or an audio connector. The interface may include, for example, an interface port for connection with an external electronic device and an interface integrated circuit (interface IC) which is electrically connected to the interface port and controls the interface port.

According to various embodiments, the electronic device101may include a first antenna240inside the housing20. The first antenna240may be, for example, a coil antenna. According to various embodiments, the first antenna240may be an antenna which supports short-range communication. The first antenna240may support short-range wireless communication, for example, near field communication (NFC), wireless charging, and/or magnetic secure transmission (MST) communication. According to an embodiment, the first antenna240may be coupled to a printed circuit board (e.g., the first printed circuit board210).

According to various embodiments, the electronic device101may include a battery250inside the housing20. The battery250is a device for supplying power to at least one component of the electronic device101and may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell. For example, at least a part of the battery250may be disposed substantially on the same plane as a printed circuit board (e.g., the first printed circuit board210and/or the second printed circuit board220). According to an embodiment, at least a part of the battery250may be arranged to overlap at least a part of the third printed circuit board230. The battery250may be integrally disposed inside the electronic device101or may be disposed to be detachable from the electronic device101.

Referring toFIGS.3and4, the third printed circuit board230may include a second antenna310. According to an embodiment, the second antenna310may include a conductive pattern. According to an embodiment, the conductive pattern may be printed on the third printed circuit board230. The conductive pattern may be a pattern made of a conductive material such as copper or an alloy containing copper. For example, the conductive pattern may be printed in a predetermined pattern shape by etching a conductive film attached to a printed circuit board (e.g., the third printed circuit board230). According to an embodiment, the second antenna310may include the conductive pattern printed on the third printed circuit board230. According to an embodiment, the conductive pattern included in the second antenna310may have a loop shape, and may be connected without being disconnected so that a constant current may flow. According to various embodiments, the first antenna240may be an antenna which supports short-range communication. The first antenna240may support short-range wireless communication, for example, near field communication (NFC), wireless charging, and/or magnetic secure transmission (MST) communication.

Referring toFIG.3, the second antenna310may be connected to the first antenna240.

Referring toFIG.3, the electronic device101may include a connection circuit (e.g., a first antenna-side connection circuit330and a second antenna-side connection circuit340) and a connection integrated circuit (IC). According to an embodiment, the second antenna310and the first antenna240may be connected through the connection circuits330and340and a connection IC320. According to an embodiment, the first antenna240and the second antenna310may be electrically connected to electrically form a closed circuit.

Referring toFIG.4, the conductive pattern included in the second antenna310may be printed on one lateral surface in a second direction (the Z-axis direction) of the third printed circuit board230. According to an embodiment, the second antenna310may be disposed on one lateral surface in the second direction of the third printed circuit board230. Referring toFIG.4, the third printed circuit board230may be disposed so that at least a part of the third printed circuit board230is positioned in a space between the battery250and the second plate22, and the conductive pattern may be printed on one lateral surface of the third printed circuit board230so as to be positioned in a space between the third printed circuit board230and the second plate22.

FIG.5is a rear view of the electronic device101according to an embodiment of the disclosure.

According to various embodiments, the first antenna240may support short-range wireless communication. According to various embodiments, the first antenna240may be a coil antenna. According to an embodiment, the first antenna240may include a conductive coil. According to an embodiment, the first antenna240may induce magnetic flux when a current flows through the conductive coil. The magnetic flux induced by the first antenna240may be used as, for example, a magnetic signal. According to an embodiment, the magnetic flux induced from the first antenna240may be determined by a winding direction of the conductive coil and a direction of the current. According to an embodiment, the first antenna240may be configured so that the magnetic flux induced from the first antenna240may be formed in a second direction (e.g., the Z-axis direction) or a first direction (e.g., the opposite direction of the Z-axis). That is, the winding direction of the conductive coil included in the first antenna240may be formed so that magnetic flux may be generated in the second direction or the first direction.

According to various embodiments, the second antenna310may support short-range wireless communication. According to various embodiments, the second antenna310may include a conductive pattern. According to an embodiment, the conductive pattern included in the second antenna310may include a loop-shaped pattern. According to an embodiment, the conductive pattern included in the second antenna310may have a coil shape including a plurality of loop-shaped patterns. According to an embodiment, the second antenna310may induce magnetic flux when a current flows through the conductive pattern. The magnetic flux induced by the second antenna310may be used as, for example, a magnetic signal. According to an embodiment, the magnetic flux induced from the second antenna310may be determined by a direction formed by the loop shape of the conductive pattern and a direction of the current. According to an embodiment, the second antenna310may include a shape which allows the magnetic flux induced from the second antenna310to be formed in a second direction (e.g., the Z-axis direction) or a first direction (e.g., the opposite direction of the Z-axis). That is, a direction of a loop of the conductive pattern included in the second antenna310may be formed so that magnetic flux may be generated in the second direction or the first direction.

Referring toFIG.5, a range (e.g., a first recognition range510and/or a second recognition range520) of an area in which each of a plurality of antennas (e.g., the first antenna240and the second antenna310) included in the electronic device101may recognize a short-range wireless communication signal may be formed. According to various embodiments, each of the first antenna240and/or the second antenna310may transmit or receive a short-range wireless communication (e.g., NFC communication and/or MST communication) signal. According to an embodiment, a short-range wireless communication signal transmitted and/or received by the first antenna240may be recognized at a short distance (e.g., within 0 to 5 cm). According to an embodiment, a range (e.g., the first recognition range510) of an area in which a signal transmitted and/or received by the first antenna240may be recognized by an external electronic device (e.g., the external electronic device102ofFIG.1) and/or the first antenna240according to characteristics of short-range wireless communication may be formed in a predetermined range (e.g., a range within 0 to 5 cm) with reference to the first antenna240.

According to an embodiment, a short-range wireless communication signal transmitted and/or received by the second antenna310can be recognized at a short distance (e.g., within 0 to 5 cm). According to an embodiment, a range (e.g., the second recognition range520) of an area in which a signal transmitted and/or received by the second antenna310may be recognized by an external electronic device (e.g., the external electronic device102ofFIG.1) and/or the second antenna310according to characteristics of short-range wireless communication may be formed in a predetermined range (e.g., a range within 0 to 5 cm) with reference to the second antenna310.

According to various embodiments, a recognition range in which the electronic device101may recognize a short-range wireless signal from the outside (e.g., the external electronic device102ofFIG.1) and/or a range in which a short-range wireless signal transmitted from the electronic device101may be recognized from the outside (e.g., the external electronic device102ofFIG.1) may be formed in an area which at least includes a recognition range (e.g., the first recognition range510) of the first antenna240and a recognition range (e.g., the second recognition range520) of the second antenna310.

According to various embodiments, the first antenna240and the second antenna310may induce magnetic flux to each other (mutual induction). According to an embodiment, the first antenna240and the second antenna310may be configured as a series circuit having one path through which a current flows. For example, the conductive coil included in the first antenna240and the conductive pattern included in the second antenna310may be electrically connected to each other to form a series-connected closed circuit. According to an embodiment, the magnetic flux induced by the first antenna240may induce the second antenna310, and the magnetic flux induced from the second antenna310may induce the first antenna240, so as to form mutual induction. According to an embodiment, a direction of the magnetic flux induced from the first antenna240and/or the second antenna310may be determined by a winding direction of the conductive coil included in the first antenna240, a loop direction of the conductive pattern included in the second antenna310, and/or a current direction of each antenna (e.g., the first antenna240and/or the second antenna310). According to an embodiment, when the directions of the magnetic fluxes induced by the first antenna240and the second antenna310are the same, that is, when the mutual induction between the first antenna240and the second antenna310leads to an aiding connection, the total inductance may be greater than the sum of self-inductance of respective antennas (e.g., the first antenna240and the second antenna310). For example, the self-inductance of the first antenna240is L1, the self-inductance of the second antenna310is L2, and mutual inductance according to the interaction between the first antenna240and the second antenna310is M, in the case of the aiding connection, the total inductance may be the same as L1+L2+2M. When the respective antennas (e.g., the first antenna240and the second antenna310) are coupled such that the directions of the induced magnetic fluxes are opposite to each other, for example, the respective antennas are opposing-connected with each other, the total inductance induced by the plurality of antennas (e.g., the first antenna240and the second antenna310) may be L1+L2−2M.

FIG.6illustrates the first antenna240according to an embodiment of the disclosure.

According to various embodiments, the first antenna240may be an antenna which supports short-range communication. The first antenna240may support short-range wireless communication, for example, near field communication (NFC), wireless charging, and/or magnetic secure transmission (MST) communication. According to an embodiment, the first antenna240may be coupled to a printed circuit board (e.g., the first printed circuit board210). According to an embodiment, the first antenna240may be connected to a control integrated circuit (IC)320through the connection circuit330. According to an embodiment, the first antenna240may receive a current supplied from the control IC320, and the supplied current may be controlled by the control IC320.

Referring toFIG.6, the first antenna240may be a coil antenna. According to various embodiments, the first antenna240may include a conductive coil including a plurality of loops. According to an embodiment, the conductive coil of the first antenna240may include a coil structure wound in a predetermined direction (e.g., a clockwise direction and/or a counterclockwise direction). According to an embodiment, magnetic flux, that is, a magnetic signal, may be emitted to the outside by a current flowing through the conductive coil included in the first antenna240. According to an embodiment, magnetic flux induced from the first antenna240may be determined by a winding direction of the conductive coil and a direction of the current. According to an embodiment, the first antenna240may be configured so that the magnetic flux induced from the first antenna240may be formed in a second direction (e.g., the Z-axis direction) or a first direction (e.g., the opposite direction of the Z-axis). That is, the winding direction of the conductive coil included in the first antenna240may be formed so that magnetic flux may be generated in the second direction or the first direction.

FIG.7illustrates a first antenna and a second antenna according to an embodiment of the disclosure.

FIG.8illustrates a second antenna to which a pattern is added according to an embodiment of the disclosure.

FIG.9illustrates an extended third printed circuit board according to an embodiment of the disclosure.

Referring toFIGS.7,8, and9, the third printed circuit board230may be electrically connected to the first printed circuit board210. According to various embodiments, the third printed circuit board230may include the second antenna310. According to various embodiments, the first antenna240may be an antenna which supports short-range communication. The first antenna240may support short-range wireless communication, for example, near field communication (NFC), wireless charging, and/or magnetic secure transmission (MST) communication.

Referring toFIGS.7,8, and9, the second antenna310may be connected to the first antenna240. According to an embodiment, the second antenna310and the first antenna240may be connected through the connection circuits330and340and the connection IC710. According to an embodiment, the first antenna240and the second antenna310may be electrically connected to electrically form a series closed circuit.

According to various embodiments, the second antenna310may include a conductive pattern. According to an embodiment, the conductive pattern may be printed on the third printed circuit board230. The conductive pattern may be a pattern made of a conductive material such as copper or an alloy containing copper. For example, the conductive pattern may be printed in a predetermined pattern shape by etching a conductive film attached to a printed circuit board (e.g., the third printed circuit board230). According to an embodiment, the second antenna310may include the conductive pattern printed on the third printed circuit board230. According to an embodiment, the conductive pattern included in the second antenna310may have a loop shape, and may be connected without being disconnected so that a constant current may flow.

According to various embodiments, a current flowing through the conductive pattern included in the second antenna310may induce magnetic flux to generate a magnetic signal. According to various embodiments, the conductive pattern may have a loop shape. Referring toFIG.7, the second antenna310may include a conductive pattern311having a loop shape. According to various embodiments, the second antenna310may include a conductive pattern having a coil shape. Referring toFIG.8, the coil shape may be a shape including a plurality of loops. According to an embodiment, the second antenna310may include a conductive pattern312having a coil shape including a plurality of loops. According to an embodiment, the second antenna310may operate as a coil antenna. According to various embodiments, the conductive pattern having the coil shape including the plurality of loop shapes may have self-inductance increased in proportion to the number of loop shapes.

According to various embodiments, the third printed circuit board230may further include an extension area231extended by a predetermined area. According to various embodiments, the third printed circuit board230may include the extension area231extending within a range not exceeding a second plate (e.g., the second plate22ofFIG.2). According to an embodiment, the extension area231may be disposed in an area which does not overlap the first antenna240. According to an embodiment, the extension area231may be disposed in an area which does not overlap the first printed circuit board210, for example, in at least a part of a second area other than a first area which is an area of the second plate22on which the first printed circuit board is disposed. According to an embodiment, an additional conductive pattern313may be printed on the extension area231. According to an embodiment, the second antenna310may include the additional conductive pattern313. According to an embodiment, the additional conductive pattern313may have a coil shape. According to an embodiment, the additional conductive pattern313may be coupled with the conductive pattern (e.g., the conductive pattern311ofFIG.7or the conductive pattern312ofFIG.8) of the second antenna310to configure one coil. According to an embodiment, a signal recognition range (e.g., the second recognition range520ofFIG.5) of the second antenna310may be extended by an area at least including an area corresponding to the additional conductive pattern313or an area corresponding to the extension area231. According to an embodiment, when the additional conductive pattern313is included, the conductive pattern included in the second antenna310may have enlarged self-inductance.

Referring toFIGS.7,8, and9, the first antenna240and the second antenna310may induce magnetic flux to each other (mutual induction). According to an embodiment, the first antenna240and the second antenna310may be configured as a series circuit having one path through which a current flows. For example, the conductive coil included in the first antenna240and the conductive pattern included in the second antenna310may be electrically connected to each other to form a series-connected closed circuit. According to an embodiment, the magnetic flux induced by the first antenna240may induce the second antenna310, and the magnetic flux induced from the second antenna310may induce the first antenna240, so as to form mutual induction. According to an embodiment, a direction of the magnetic flux induced from the first antenna240and/or the second antenna310may be determined by a winding direction of the conductive coil included in the first antenna240, a loop direction of the conductive pattern included in the second antenna310, and/or a current direction of each antenna (e.g., the first antenna240and/or the second antenna310). According to an embodiment, when the directions of the magnetic fluxes induced by the first antenna240and the second antenna310are the same, that is, when the mutual induction between the first antenna240and the second antenna310leads to an aiding connection, the total inductance may be greater than the sum of self-inductance of respective antennas (e.g., the first antenna240and the second antenna310). For example, the self-inductance of the first antenna240is L1, the self-inductance of the second antenna310is L2, and mutual inductance according to the interaction between the first antenna240and the second antenna310is M, in the case of the aiding connection, the total inductance may be the same as L1+L2+2M. When the respective antennas (e.g., the first antenna240and the second antenna310) are coupled such that the directions of the induced magnetic fluxes are opposite to each other, for example, the respective antennas are opposing-connected with each other, the total inductance induced by a plurality of antennas (e.g., the first antenna240and the second antenna310) may be L1+L2−2M.

FIG.10is an exploded perspective view of an electronic device including a ferromagnetic member according to an embodiment of the disclosure.

FIG.11is a cross-sectional side view of an electronic device including a ferromagnetic member according to an embodiment of the disclosure.

Referring toFIGS.10and11, the electronic device101may include a ferromagnetic member900. According to various embodiments, the ferromagnetic member900may include a ferromagnetic substance material having high relative permeability. According to an embodiment, the ferromagnetic member900may be made of a ferromagnetic substance material, for example, mu-metal (e.g., permalloy, silicon metal, or Fe+Ni) or ferrite. The ferromagnetic member900may be made of soft ferrite. The ferromagnetic member900may be configured by a combination of a ferromagnetic substance and soft ferrite. According to an embodiment, the ferromagnetic member900may induce a direction of magnetic flux generated by the second antenna310. According to an embodiment, the ferromagnetic member900may be disposed at a lower end of the third printed circuit board230. According to an embodiment, the ferromagnetic member900may be attached to one surface in a first direction (e.g., the opposite direction of the Z axis) of the third printed circuit board230. According to an embodiment, the ferromagnetic member900may have a plate-like shape. According to an embodiment, the ferromagnetic member900may be disposed on a lateral surface opposite to the second antenna310with reference to the third printed circuit board230. According to an embodiment, the ferromagnetic member900may be coupled to the third printed circuit board230while being insulated from the third printed circuit board230. According to an embodiment, the ferromagnetic member900may include a plate, sheet, or thin-film foil shape.

An electronic device according to various embodiments disclosed herein may include a housing which includes a first plate facing a first direction and a second plate facing a second direction opposite to the first direction, and forms a space between the first plate and the second plate, a display disposed inside the housing and exposed through the first plate, a first printed circuit board disposed between the display and the second plate, a second printed circuit board disposed between the display and the second plate, a third printed circuit board which is disposed between the display and the second plate and electrically connects the first printed circuit board and the second printed circuit board, and a first antenna coupled to the first printed circuit board, wherein the third printed circuit board includes a second antenna electrically connected to the first antenna.

In addition, the second antenna may include a conductive pattern formed on the third printed circuit board.

In addition, the first antenna and the second antenna may be aiding-connected to each other.

In addition, the conductive pattern may have a loop shape.

In addition, the conductive pattern may have a coil shape including a plurality of loops.

In addition, the pattern having the loop shape may be formed in a direction in which the first antenna and the second antenna are aiding-connected to each other.

In addition, the second antenna may be electrically connected to the first antenna to form a closed circuit.

In addition, the third printed circuit board may be arranged to overlap at least a part of a second area of the second plate excluding a first area on which the first printed circuit board is disposed among areas of the second plate.

In addition, the second antenna may be arranged to overlap at least a part of the second area.

In addition, the third printed circuit board may be a flexible printed circuit board (FPCB).

In addition, the electronic device may further include a ferromagnetic member for inducing magnetic flux to the second antenna.

In addition, the ferromagnetic member may be attached to a lateral surface in the first direction of the third printed circuit board.

In addition, the ferromagnetic member may include a mu-metal, permalloy, and/or ferrite material.

In addition, the third printed circuit board may include an extension area extending in a direction in which the third printed circuit board does not overlap the first printed circuit board, and may include an additional conductive pattern printed on the extension area, electrically connected to the second antenna, and having a coil shape.

In addition, the first antenna may be a coil antenna including a plurality of loops.

In addition, the electronic device may further include a processor, a memory, and an integrated circuit coupled to the first printed circuit board, and the integrated circuit may be electrically connected to the first antenna and the second antenna.

In addition, the electronic device may further include an interface port coupled to the second printed circuit board in order for connection with an external electronic device, and an interface integrated circuit (IC) electrically connectable to the interface port.

In addition, the second antenna may support near field communication (NFC) communication.

In addition, the second antenna may support magnetic secure transmission (MST) communication.

In addition, the first antenna may support near field communication (NFC) communication and/or magnetic secure transmission (MST) communication.