KR20210015460A - A wearable electronic device comprising an antenna - Google Patents

Abstract

A wearable electronic device is disclosed. The wearable electronic device according to an embodiment comprises: a display; a metal frame forming at least a part of the side surface of the wearable electronic device while surrounding the display; a battery; a conductive support member disposed under the display and supporting the battery; a PCB; a conductive fastening member for coupling the conductive support member and the PCB to each other; a wireless communication circuit; and a switch circuit electrically connected to the wireless communication circuit. The PCB comprises a first ground electrically connected to the metal frame, a second ground spaced apart from the first ground, and a non-conductive area surrounding the second ground. The conductive fastening member comes into electrical contact with the second ground of the PCB. The switch circuit is electrically connected to the first ground and the second ground. The wireless communication circuit can control the switch circuit to change a connection state. Other embodiments are possible. The present invention can reduce the mounting space for parts related to an antenna.

Description

A wearable electronic device including an antenna {A WEARABLE ELECTRONIC DEVICE COMPRISING AN ANTENNA}

Various embodiments relate to a wearable electronic device including an antenna.

Electronic devices include antennas supporting various frequency bands in order to perform various functions. The electronic device may include a plurality of antennas for performing wireless communication such as LTE and Wi-Fi and short-range communication such as Bluetooth.

Electronic devices are gradually becoming smaller. In particular, a wearable electronic device has a limit on the size of the terminal due to the characteristics that it is worn on the user's body, and a space for mounting various parts inside the terminal may be further limited.

Meanwhile, the frequency band of the radio signal transmitted and received by the electronic device may depend on physical characteristics of the antenna radiator. When a metal frame of a wearable electronic device is used as an antenna radiator, it may be difficult for a wearable electronic device having a limited size to implement an antenna structure operating in various frequency bands.

The present disclosure (disclosure) provides a wearable electronic device for saving an antenna-related component mounting space and receiving RF signals in various frequency bands.

A wearable electronic device according to an embodiment includes a display, a metal frame surrounding the display and forming at least a part of a side surface of the wearable electronic device, a battery, a conductive support member disposed under the display and supporting the battery, the conductive A support member and a printed circuit board (PCB) disposed under the battery, a conductive fastening member coupling the conductive support member and the PCB, a wireless communication circuit disposed on the PCB, and the wireless communication disposed on the PCB A switch circuit electrically connected to a circuit, and the PCB includes a first ground electrically connected to the metal frame, an opening, a second ground surrounding the opening and spaced apart from the first ground, and the And a non-conductive region surrounding a second ground, wherein the conductive fastening member is coupled to the conductive support member through the opening, in electrical contact with the second ground of the PCB, and the switch circuit comprises the Electrically connected to the first ground, electrically connected to the second ground through a designated path, and the wireless communication circuit supplies power to the metal frame to receive an RF signal corresponding to a first center frequency, and the switch The circuit may be configured to control a connection state to change and to receive an RF signal corresponding to a second center frequency lower than the first center frequency in response to the change of the connection state.

A wearable electronic device according to an embodiment includes a display, a metal frame surrounding the display and forming at least a part of a side surface of the wearable electronic device, a rear case coupled to the metal frame, a battery, and disposed under the display and the battery A conductive support member for supporting a, a printed circuit board (PCB) disposed under the conductive support member and the battery, a conductive fastening member coupling the conductive support member and the PCB, a wireless communication circuit disposed on the PCB, the An antenna pattern disposed on the inner surface of the rear case and electrically connected to the wireless communication circuit, a shielding layer formed on the inner surface of the case by being spaced apart from the antenna pattern, at least one electronic component disposed under the shielding layer, and the A switch circuit disposed on a PCB and electrically connected to the wireless communication circuit, wherein the PCB includes a first ground electrically connected to the metal frame, An opening, a second ground surrounding the opening and spaced apart from the first ground, and a non-conductive region surrounding the second ground, wherein the conductive fastening member includes the conductive support member and the conductive support member through the opening. Combined, In electrical contact with the second ground of the PCB, the switch circuit is electrically connected to the first ground of the PCB, and is electrically connected to the second ground through a designated path, and the wireless communication circuit, 1 Power supply to the metal frame to receive an RF signal corresponding to the center frequency, control the switch circuit to change the connection state, and correspond to a second center frequency lower than the first center frequency in response to the change of the connection state It may be set to receive an RF signal and feed the antenna pattern to receive an RF signal corresponding to a third center frequency higher than the first center frequency.

The wearable electronic device according to various embodiments of the present disclosure may implement low-band and high-band operating frequencies of an antenna, and tune the operating frequency without disposing an additional antenna.

1 is an exploded perspective view of an electronic device according to an exemplary embodiment.
2 is a diagram illustrating an electronic device according to an exemplary embodiment.
3 is a diagram illustrating a part of an electronic device according to an exemplary embodiment.
4 is a view of a printed circuit board according to an exemplary embodiment viewed from various directions.
5 is a view of a printed circuit board of an electronic device as viewed from various directions according to an exemplary embodiment.
6 is a schematic circuit diagram of a switch circuit according to an embodiment.
7 is a graph showing radiation efficiency according to capacitance of a switch circuit according to an exemplary embodiment.
8 is a graph showing radiation efficiency according to inductance of a switch circuit according to an exemplary embodiment.
9 is an exploded view of a rear case of an electronic device according to an exemplary embodiment.
10 is a diagram illustrating an electronic device according to an exemplary embodiment.
11 is an exploded view of a partial configuration of an electronic device according to an exemplary embodiment.
12 is a graph showing radiation efficiency of an electronic device including an antenna pattern according to an exemplary embodiment.

1 is an exploded perspective view of an electronic device according to an exemplary embodiment.

Referring to FIG. 1, the electronic device 101 is connected to the housing 110 and the housing 110, and the electronic device 101 is detachably attached to a user's body part (eg, wrist, ankle, etc.) It may include a binding member (150, 160) configured to be.

According to an embodiment, the housing 110 includes a wheel key 111, a metal frame 112, a display 120, a bracket 140, a battery 150, a conductive support member 130, and a printed circuit board 160 ), the rear case 114, and the sealing member 103 may be included.

According to an embodiment, the wheel key 111 is disposed on the front surface of the housing 110 and may be rotated in at least one direction. The wheel key 111 may have a shape corresponding to the shape of the display 120. The wheel key 111 may be a key input device that receives a user input through a rotation operation. In another embodiment, the wheel key 111 may be implemented or omitted in other forms such as a soft key. According to an embodiment, the metal frame 112 may be disposed under the wheel key 111 to be coupled to the wheel key 111. The metal frame 112 may form at least a part of a side surface of the housing 110. The metal frame 112 may be formed of a conductive material. For example, the metal frame 112 may be formed of a metal material such as aluminum. According to an embodiment, an antenna structure for transmitting and receiving a radio frequency (RF) signal may be formed by at least a part of the metal frame 112.

According to an embodiment, the display 120 may be disposed under the metal frame 112. The display 120 is seated in a space formed by the metal frame 112 and can be seen from the outside through an opening formed in the metal frame 112. According to an embodiment, the shape of the display 120 may be a shape corresponding to the shape of an opening formed in the metal frame 112. The shape of the display 120 may be various shapes such as a circle, an oval, or a polygon.

According to an embodiment, the display 120 may be electrically connected to the printed circuit board 160 through the flexible circuit board 123. For example, one end of the flexible circuit board 123 may be electrically connected to the display 120, and the other end of the flexible circuit board 123 may be electrically connected to the printed circuit board 160.

According to an embodiment, the display 120 may include a window (or a transparent plate) 122. The window 122 may be formed of glass, plastic, or polymer. Light output from the display 120 may pass through the window 122 and be emitted to the outside.

According to an embodiment, the display 120 may be combined with or disposed adjacent to a touch sensing circuit, not shown, a pressure sensor capable of measuring the intensity (pressure) of a touch, and/or a fingerprint sensor. Data or signals obtained from the touch sensing circuit, the pressure sensor, and the fingerprint sensor may be provided to a processor disposed on the printed circuit board 160 through the flexible circuit board 123.

According to an embodiment, the bracket 140 may be disposed inside the electronic device 101 to be connected to the metal frame 112 or may be integrally formed with the metal frame 112. The metal frame 112 may be formed of, for example, a metal material and/or a non-metal (eg, polymer) material. The metal frame 112 may have a display 120 coupled to one surface thereof and a printed circuit board 160 coupled to the other surface. The bracket 140 may accommodate the battery 150 therein. The internal space of the bracket 140 may have a larger volume than the battery 150 in consideration of swelling of the battery 150. According to an embodiment, an antenna structure may be formed by a part of the bracket 140 and/or the metal frame 112 or a combination thereof.

According to an embodiment, the battery 150 may supply power to at least one component of the electronic device 101. The battery 150 may include, for example, a non-rechargeable primary cell, a rechargeable secondary cell, or a fuel cell. The battery 150 may be disposed in a space formed by the bracket 140. According to an embodiment, the battery 150 may be integrally disposed inside the electronic device 101 or may be disposed to be detachable from the electronic device 101.

According to an embodiment, the conductive support member 130 may be disposed between the display 120 and the bracket 140. The conductive support member 130 may be disposed on one surface of the bracket 140 to support the battery 150 so as not to be separated from the bracket 140. The conductive support member 130 may be formed of, for example, a metal material such as stainless steel. According to an embodiment, the conductive support member 130 may be a sheet or a thin film-shaped conductive plate.

According to an embodiment, the printed circuit board 160 may be disposed between the bracket 140 and the rear case 114. A processor, memory, and/or interface may be mounted on the printed circuit board 160.

According to an embodiment, the processor may include, for example, one or more of a central processing unit, an application processor, a graphic processing unit (GPU), an application processor sensor processor, or a communication processor. The communication processor may include wireless communication circuitry.

According to an embodiment, the memory may include, for example, a volatile memory or a nonvolatile memory. The memory may store various data (eg, application and application-related data) or instructions used by other components (eg, a processor) of the electronic device 101.

According to an embodiment, the rear case 114 may be combined with the metal frame 112 to form the rear surface of the electronic device 101. The rear case 114 may be formed of a substantially opaque material. The rear case 114 is formed by, for example, coated or colored glass, ceramic, polymer, metal (eg, aluminum, stainless steel (STS), or magnesium), or a combination of at least two of the above materials. I can.

According to an embodiment, the sealing member 103 may be positioned between the metal frame 112 and the rear case 114. The sealing member 103 may be configured to block moisture and foreign matter flowing into the space surrounded by the metal frame 112 and the rear case 114 from the outside.

According to an embodiment, the binding members 150 and 160 may be detachably attached to at least a partial area of the housing 110. The binding members 150 and 160 may include one or more of a fixing member 165, a fixing member fixing hole 152, a band guide member 161, and a band fixing ring 163.

The fixing member 165 may be configured to fix the housing 110 and the binding members 150 and 160 to a user's body part (eg, wrist, ankle, etc.). The fixing member fastening hole 152 may fix the housing 110 and the fixing members 150 and 160 to a part of the user's body corresponding to the fixing member 165. The band guide member 161 is configured to limit the movement range of the fixing member 165 when the fixing member 165 is fastened with the fixing member fastening hole 152, so that the binding members 150 and 160 It can be tightly attached. The band fixing ring 163 may limit the motion range of the fixing members 150 and 160 in a state in which the fixing member 165 and the fixing member fixing hole 152 are fastened.

According to an embodiment, the binding members 150 and 160 may be formed of various materials and shapes. An integral type and a plurality of unit links may be formed to flow with each other by woven material, leather, rubber, urethane, metal, ceramic, or a combination of at least two of the above materials.

The electronic device 101 according to an embodiment may include an audio module, a sensor module, a haptic module, and at least one antenna (not shown).

According to an embodiment, the at least one antenna may include, for example, a near field communication (NFC) antenna, a wireless charging antenna, and/or a magnetic secure transmission (MST) antenna. At least one antenna, for example, may perform short-range communication with an external device, wirelessly transmit/receive power required for charging, and transmit a short-range communication signal or a self-based signal including payment data. In one embodiment, the antenna structure may be formed by a part of the metal frame 112 and/or the rear case 114 or a combination thereof.

2 is a diagram illustrating an electronic device according to an exemplary embodiment.

Among the components of FIG. 2, descriptions of components similar to or identical to those of FIG. 1 will be omitted.

Referring to FIG. 2, the electronic device 201 may include a printed circuit board 160, a conductive support member 130, a conductive fastening member 134, and a switch circuit 170.

In an embodiment, the printed circuit board 160 may include a wireless communication circuit 102, a power supply unit 162 and a first ground 164.

In one embodiment, the wireless communication circuit 102 may be disposed on the printed circuit board 160. The wireless communication circuit 102 may be electrically connected to at least one of other components disposed on the printed circuit board 160.

In one embodiment, the power supply unit 162 may be electrically connected to the wireless communication circuit 102 and the metal frame 112 disposed on the printed circuit board 160. For example, the power supply unit 162 may be electrically connected to the metal frame 112 in a manner that contacts one point (eg, a first point) of the metal frame 112. In order for the power supply unit 162 to contact one point of the metal frame 112, various connecting members may be used. The connection member may extend from the power supply unit 162 to bypass or pass through other components mounted in the electronic device 201 and extend to the first point of the metal frame 112. The connection member may include, for example, an FPCB, a C-clip, a conductive connector, or a metal wire, but is not limited thereto.

In an embodiment, the first ground 164 may be formed in a region of the printed circuit board 160. The first ground 164 may be formed of, for example, one of a plurality of layers included in the printed circuit board 160 or may be formed in a designated area of the one layer. The first ground 164 may be electrically connected to the metal frame 112 through a different point (eg, a second point) from the power supply unit 162 of the inner surface of the metal frame 112. In order for the first ground 164 to contact the second point of the metal frame 112, various connecting members may be used. For example, the various connection members may include an FPCB, a C-clip, a conductive connector, or a metal wire, but are not limited thereto.

In an embodiment, an electrical path including the power supply unit 162, the metal frame 112, and the first ground 164 may be formed. The wireless communication circuit 102 may be configured to transmit or receive a radio frequency (RF) signal by feeding power to the metal frame 112 through the power supply unit 162. The frequency band of the RF signal transmitted or received by the wireless communication circuit 102 may vary according to the length of the electrical path. The wireless communication circuit 102 may transmit or receive an RF signal in a frequency band corresponding to the length of the electrical path by feeding power to the first point through the power supply unit 162. For example, the wireless communication circuit 102 has a length between a first point of the metal frame 112 in contact with the power supply unit 162 and a second point of the metal frame 112 in contact with the first ground 164 A part of the metal frame 112 corresponding to may be used as a first antenna radiator for obtaining a signal in the first frequency band.

In an embodiment, the electric path may be at least one or more depending on a contact position between the power supply unit 162 and the first ground 164 in contact with the metal frame 112. For example, in the case where the metal frame 112 constituting the housing of the wearable electronic device 201 has a closed curve shape (eg, a circle or a square with rounded corners), the feed point and the ground point do not face each other or The positions of the feed point and the ground point may be asymmetric. In this case, a relatively long electrical path and a relatively short electrical path may be formed. In an embodiment, a low-band RF signal may be transmitted or received through a relatively long electrical path. For example, the low-band RF signal may be a frequency band corresponding to LTE B5 (eg, 850 MHz), B8 (eg, 900 MHz), or B20 (eg, 800 MHz). In an embodiment, an RF signal of an intermediate band may be transmitted or received through an electrical path having a relatively short length. For example, the RF signal in the intermediate band is a frequency band corresponding to LTE B1 (eg 2100 MHz), B2 (eg 1900 MHz), B3 (eg 1800 MHz), or B4 (eg 1700 MHz). I can.

In one embodiment, the conductive support member 130 may include a protrusion 132. The conductive support member 130 and the protrusion 132 may be integrally formed. When the conductive support member 130 is coupled to the bracket 140, the protrusion 132 may penetrate at least a part of the inner space of the bracket 140. When the conductive support member 130 is coupled with the bracket 140, the protrusion 132 may not be visible from the outside of the bracket 140.

In one embodiment, the conductive fastening member 134 may be inserted into an opening formed in the printed circuit board 160 and coupled to the conductive support member 130. The conductive fastening member 134 may pass through the printed circuit board 160 and be coupled to the protrusion 132 formed on the conductive support member 130. In one embodiment, the conductive fastening member 134 may be a screw having a threaded line formed thereon. The protrusion 132 is formed in a cylindrical shape with an empty inside, and may accommodate at least a part of the conductive fastening member 134. The inner surface of the protrusion 132 may have a groove corresponding to the thread of the conductive fastening member 134.

In one embodiment, the conductive fastening member 134 may pass through the bracket 140 and be coupled to the conductive support member 130. In a state in which the conductive fastening member 134 is coupled with the conductive support member 130, the conductive fastening member 134 may not be visible from the outside of the bracket 140.

In one embodiment, the switch circuit 170 may be disposed on the printed circuit board 160. The switch circuit 170 may be electrically connected to the wireless communication circuit 102 and the first ground 164 of the printed circuit board 160. The switch circuit 170 may be electrically connected to the conductive fastening member 134. For example, the switch circuit 170 may be electrically connected to the conductive fastening member 134 through wiring formed on the printed circuit board 160. By an operation in which the conductive fastening member 134 is fastened to the conductive support member 130, the conductive fastening member 134 and the wiring are in contact, and the switch circuit 170 may be electrically connected to the conductive fastening member 134. have. Through the switch circuit 170, the first ground 164 may be electrically connected to the conductive fastening member 134 and the conductive support member 130.

In one embodiment, the switch circuit 170 may include a plurality of devices. The switch circuit 170 may include, for example, a plurality of lumped elements. The wireless communication circuit 102 electrically connected to the switch circuit 170 may control the switch circuit 170 to change a connection state between the first ground 164 and the conductive fastening member 134. For example, the wireless communication circuit 102 may change the connection state of the switch circuit 170 so that the first ground 164 and the conductive fastening member 134 are electrically separated. For example, the wireless communication circuit 102 may control the first ground 164 and the conductive fastening member 134 to be electrically connected to each other including any one of the plurality of elements.

3 is a diagram illustrating a part of an electronic device according to an exemplary embodiment.

Among the components of FIG. 3, a description of components similar to or identical to those of FIGS. 1 to 2 will be omitted.

In an embodiment, the printed circuit board 160 may include an opening 166, a second ground 167, a non-conductive region 168, and a switch circuit 170.

In an embodiment, the opening 166 may be formed to penetrate the printed circuit board 160. The conductive fastening member 134 may be inserted into the opening 166. A head portion formed at one end of the conductive fastening member 134 may be formed larger than the opening 166, and portions other than the head portion may be formed to have a circumference smaller than the perimeter of the opening. The head of the conductive fastening member 134 may not pass through the opening 166 and may be caught on the printed circuit board 160, and the rest of the conductive fastening member 134 may pass through the opening 166 except for the head. In an embodiment, a portion of the head that is in contact with the printed circuit board 160 may be formed flat. Through an operation in which the conductive fastening member 134 is fastened with the protrusion 132, the flat surface of the head may be in close contact with the printed circuit board 160.

In one embodiment, the second ground 167 may be formed to surround the opening 166. The second ground 167 completely surrounds the opening 166 and extends in a direction away from the opening 166 at the first and second surfaces 160-1 and 160-2 of the printed circuit board 160. I can. A region in which the second ground 167 extends from the first surface 160-1 may correspond to the head of the conductive fastening member 134. For example, the outermost circumference of the region where the second ground 167 extends from the first surface 160-1 is substantially the same as or larger than the outermost circumference of the head of the conductive fastening member 134 Can be. In an embodiment, a region in which the second ground 167 extends from the second surface 160-2 of the printed circuit board 160 may be different from the region that extends from the first surface 160-1. In addition, in an embodiment, the second ground 167 does not extend in a direction parallel to the second surface 160-2 from the second surface 160-2, but may be formed only on the sidewall of the opening 166. .

In one embodiment, the second ground 167 may be in close contact with the conductive fastening member 134 through an operation in which the conductive fastening member 134 is coupled to the conductive support member 130.

In an embodiment, the second ground 167 may be formed of a conductive material. The second ground 167 may be electrically and physically connected to the conductive fastening member 134.

In an embodiment, the non-conductive region 168 is formed to surround the second ground 167 and may extend in a direction away from the opening 166. The outer circumference of the non-conductive region 168 may be larger than the circumference of the head of the conductive fastening member 134 and the circumference of the second ground 167. The non-conductive region 168 is formed of a non-conductive material, so that an electrical space may be provided so that the second ground 167 can operate as a floating ground.

In an embodiment, the switch circuit 170 may be disposed on the first surface 160-1 of the printed circuit board 160. The switch circuit 170 may be electrically connected to the wiring member 171 formed on the printed circuit board 160, and to be electrically connected to the conductive fastening member 134 and the second ground 167 through the wiring member 171. I can. The conductive fastening member 134, the second ground 167, and the wiring member 171 may be electrically connected through an operation in which the conductive fastening member 134 is coupled to the conductive support member 130. In an embodiment, the switch circuit 170 may be electrically connected to the first ground 164.

In one embodiment, the switch circuit may include a plurality of devices. The wireless communication circuit 102 electrically connected to the switch circuit 170 may be configured to control the switch circuit 170 to change a connection state between the first ground 164 and the second ground 167. For example, the wireless communication circuit 102 may change the connection state of the switch circuit 170 so that the first ground 164 and the second ground 167 are electrically separated. For example, the wireless communication circuit 102 may selectively control the first ground 164 and the second ground 167 to be electrically connected to each other including any one of the plurality of elements.

4 is a view of a printed circuit board according to an embodiment as viewed from various directions.

4, reference numeral 410 denotes a first surface 160-1 of the printed circuit board 160, and reference numeral 420 denotes a first surface 160-1 and a second surface of the printed circuit board 160. A third surface 160-3 is denoted between the surfaces 160-2, and reference numeral 430 denotes a second surface 160-2 of the printed circuit board 160.

Among the components of FIG. 4, a description of components similar to or identical to those of FIGS. 1 to 3 will be omitted.

Referring to reference numeral 410, the first surface 160-1 of the printed circuit board 160 includes an opening 166, a second ground 167, a non-conductive region 168, and a switch circuit 170. can do.

In an embodiment, the opening 166 may penetrate the printed circuit board 160 in a direction perpendicular to the first surface 160-1.

In an embodiment, the second ground 167 may extend in a direction away from the circumference of the opening 166. The second ground 167 may be formed to surround at least a portion of the non-conductive region 168.

In an embodiment, the non-conductive region 168 may extend from the outer periphery of the second ground 167 in a direction away from the second ground 167.

In an embodiment, the switch circuit 170 may be disposed to be spaced apart from the second ground 167, and may be electrically connected to the second ground 167 through a wiring member.

Referring to reference numeral 420, the third surface 160-3 of the printed circuit board 160 may include an opening 166, a second ground 167, and a non-conductive region 168.

In one embodiment, the opening 166 may extend substantially the same circumference from the first surface 160-1 to the third surface 160-3.

In an embodiment, the second ground 167 may be formed to surround the opening 166 and may extend in a direction away from the opening 166. The area of the second ground 167 of the third surface 160-3 may be smaller than the area of the second ground 167 of the first surface 160-1.

In an embodiment, the non-conductive region 168 may be formed to surround the second ground 167. The non-conductive region 168 may extend in a direction away from the second ground 167.

In an embodiment, the non-conductive region 168 formed on the third surface 160-3 may include a region corresponding to the non-conductive region 168 formed on the first surface 160-1. . The non-conductive region 168 of the third surface 160-3 may further include a region for 3D wiring of the printed circuit board 160 formed of a plurality of layers.

Referring to reference numeral 430, the second surface 160-2 of the printed circuit board 160 may include an opening 166, a second ground 167, and a non-conductive region 168.

In one embodiment, the opening 166 of the second surface 160-2 is substantially the same circumference to the first surface 160-1, the third surface 160-3, and the second surface 160-2. Can be extended to

In an embodiment, the second ground 167 of the second surface 160-2 may be formed to surround the opening 166. The area of the second ground 167 of the second surface 160-2 may be smaller than the area of the second ground 167 of the first surface 160-1, and the area of the third surface 160-3 2 It may be substantially the same as or larger than the area of the ground 167.

In an embodiment, the non-conductive region 168 of the second surface 160-2 surrounds the second ground 167 and may extend in a direction away from the second ground 167. The area of the non-conductive area 168 of the second surface 160-2 may be substantially the same as the area of the non-conductive area 168 of the first surface 160-1.

5 is a view of a printed circuit board of an electronic device as viewed from various directions according to an exemplary embodiment.

5, reference numeral 510 denotes the first surface 160-1 of the printed circuit board 160 into which the conductive fastening member 134 is inserted, and the reference numeral 520 is coupled to the conductive support member 130. It is a perspective view of the printed circuit board 160, and reference numeral 530 may denote the second surface 160-2 of the printed circuit board 160 into which the conductive fastening member 134 is inserted.

Referring to reference numeral 510, the first surface 160-1 of the printed circuit board 160 may include a conductive fastening member 134, a non-conductive region 168, and a wiring member 169.

In one embodiment, the conductive fastening member 134 may be inserted through the printed circuit board 160. The head of the conductive fastening member 134 may not pass through the printed circuit board 160 and may be caught on the printed circuit board 160. The second ground 167 having a circumference substantially the same as the head of the conductive fastening member 134 is covered by the conductive fastening member 134 and may not be visible from the first surface 160-1. Unlike the above, the second ground 167 may be seen in a state in which the conductive fastening member 134 is fastened to the printed circuit board 160 according to the width or outer circumference of the second ground 167.

In an embodiment, the non-conductive region 168 may have a wider circumference than the conductive fastening member 134.

In an embodiment, the wiring member 169 may be formed to extend from the second ground 167. The wiring member 169 may include at least one conductive via. Unlike the above description in FIGS. 1 to 4, the switch circuit 170 may be disposed on a surface other than the first surface 160-1 of the printed circuit board 160. In this case, the wiring member 169 may electrically connect the switch circuit 170 to the conductive fastening member 134 and the second ground 167 through the conductive via.

Referring to reference numeral 520, the printed circuit board 160 may be coupled to the conductive support member 130 by a conductive fastening member 134. The conductive fastening member 134 may be at least partially inserted and coupled to the protrusion 132 of the conductive support member 130.

Referring to reference numeral 530, the second surface 160-2 of the printed circuit board 160 may include a conductive fastening member 134 and a switch circuit 170.

In one embodiment, the periphery of the area excluding the head portion of the conductive fastening member 134 is formed to have substantially the same periphery as the opening 166 and may pass through the printed circuit board 160.

In an embodiment, the switch circuit 170 may be spaced apart from the non-conductive region 168 and disposed on the second surface 160-1 of the printed circuit board 160. The switch circuit 170 may be electrically connected to the wiring member 169 formed on the first surface 160-1.

6 is a schematic circuit diagram of a switch circuit according to an embodiment.

7 is a graph showing radiation efficiency according to capacitance of a switch circuit according to an exemplary embodiment.

8 is a graph showing radiation efficiency according to inductance of a switch circuit according to an exemplary embodiment.

Referring to FIG. 6, the conductive fastening member 134 and the first ground 164 may be electrically connected or opened according to the switching operation of the switch circuit 170. The switch circuit 170 may include a plurality of impedance elements z1, z2, z3, and z4. The switch circuit 170 may be connected to any one selected from among the plurality of impedance elements z1, z2, z3, and z4. The conductive fastening member 134 and the first ground 164 may be electrically connected in a state in which the switch circuit 170 and one of the plurality of impedance elements z1, z2, z3, and z4 are connected. The plurality of impedance elements z1, z2, z3, and z4 according to an embodiment may include at least one of a capacitor and an inductor. A capacitance value or an inductance value of each of the plurality of impedance elements z1, z2, z3, and z4 may be different.

In an embodiment, the wireless communication circuit 102 may control the switch circuit 170 to change a connection state between the conductive fastening member 134 and the first ground 164. Based on the change in the connection state, the frequency band of the RF signal transmitted or received by the electronic device may vary.

In one embodiment, as the conductive fastening member 134 and the first ground 164 are electrically connected by the switch circuit 170 to expand the ground of the antenna structure, the frequency of the RF signal transmitted or received by the electronic device Band can be lowered. For example, referring to FIG. 7, when the conductive fastening member 134 and the first ground 164 are connected by the switch circuit 170 (graph (b)), the RF signal transmitted or received by the electronic device is The frequency band is greater than the frequency band of the RF signal transmitted or received by the electronic device in a state in which the conductive fastening member 134 and the first ground 164 are not connected by the switch circuit 170 (graph (a)). It can be low.

In an embodiment, in graph (a), the RF signal transmitted or received by the electronic device has a first center frequency (eg, about 900 MHz), and in graph (b), the RF signal transmitted or received by the electronic device is It may have a second frequency (eg, about 800MHz) lower than the center frequency. In various embodiments, the first center frequency may be a frequency corresponding to LTE B1, B2, B3, B4, B5, B8 or B20, and the second center frequency is LTE B12 (eg 700 MHz), B13 ( Example: 700 MHz), or may be a frequency corresponding to B71 (eg, 600 MHz).

In an embodiment, in a state in which the conductive fastening member 134 and the first ground 164 are electrically connected by the switch circuit 170, as the capacitance value of the capacitor connected to the switch circuit 170 increases, the electronic The frequency band of the RF signal transmitted or received by the device may be lowered. For example, referring to FIG. 7, in a state in which the switch circuit 170 is connected to a capacitor having a capacitance value of C1 (graph (b)), the switch circuit ( When 170) is connected to a capacitor having a capacitance value of C2 higher than C1 (graph (c)), the frequency band of the RF signal transmitted or received by the electronic device may be lower.

In one embodiment, the RF signal transmitted or received by the electronic device in graph (b) may have a second center frequency (eg, about 800 MHz), and the RF signal transmitted or received by the electronic device in graph (c) May have a third center frequency (eg, about 750 MHz) lower than the second center frequency.

In one embodiment, in a state in which the conductive fastening member 134 and the first ground 164 are electrically connected by the switch circuit 170, as the inductance value of the inductor connected to the switch circuit 170 increases, the electron The frequency band of the RF signal transmitted or received by the device may be increased. For example, referring to FIG. 8, in a state in which the switch circuit 170 is connected to an inductor having an inductance value of L1 (graph (a)), the switch circuit is higher than the frequency band of the RF signal transmitted or received by the electronic device ( When 170) is connected to an inductor having an inductance value of L2 higher than L1 (graph (b)), the frequency band of the RF signal transmitted or received by the electronic device may be higher.

In an embodiment, the RF signal transmitted or received by the electronic device in graph (a) of FIG. 8 may have a fourth center frequency (eg, 2000 MHz), and the electronic device transmits in graph (b) of FIG. Alternatively, the received RF signal may have a fifth center frequency (eg, 2500 MHz) higher than the fourth center frequency. The fourth center frequency may be a frequency corresponding to B1, B2, B3, B4, B5, B8, or B20, and the fifth center frequency may be a frequency corresponding to B7, B38, B40, or B41.

9 is an exploded view of a rear case of an electronic device according to an exemplary embodiment.

Referring to FIG. 9, the rear case 114 may include a rear case frame 114a, a rear plate 114b, a biometric sensor 992, and a wireless charging coil 994.

The rear case frame 114a according to an embodiment may form an inner surface of the rear case 114.

The rear plate 114b according to an embodiment may be combined with the rear case frame 114a to form an inner space of the rear case 114. Various electronic components may be mounted in the inner space.

In one embodiment, the biometric sensor 992 may be disposed between the rear case frame 114a and the rear plate 114b. The biometric sensor 992 may be disposed inside the rear case 114. The biometric sensor 992 may include a heart rate sensor.

In one embodiment, the wireless charging coil 994 may be disposed between the rear case frame 114a and the rear plate 114b. The wireless charging coil 994 may receive power from an external device.

10 is a diagram illustrating an electronic device according to an exemplary embodiment.

Among the components of FIG. 10, descriptions of components similar to or identical to those of FIGS. 1 to 3 will be omitted.

Referring to FIG. 10, the electronic device 1001 may include an antenna pattern 1080, electronic components 1086, and a shielding layer 1084.

In one embodiment, the antenna pattern 1080 may be disposed on the inner surface of the rear case 114. The antenna pattern 1080 may be formed by printing on a flexible circuit board. The antenna pattern 1080 may be electrically connected to the power supply unit 162 of the printed circuit board 160. An electrical path connecting the antenna pattern 1080 and the power supply unit 162 may be formed by branching from an electrical path connecting the power supply unit 162 and the metal frame 112. A shunt element may be formed at the branch point. By the antenna pattern 1080, an RF signal of a high band (eg, 2500 MHz to 2700 MHz) may be transmitted or received.

In an embodiment, the electronic components 1086 may be disposed inside the rear case 114. The electronic components 1086 may be disposed in a space formed by the rear case frame 114a and the rear plate 114b. The electronic components 1086 may include at least one of the biometric sensor 992 and the wireless charging coil 994 of FIG. 9, and may include other electronic components not described.

In one embodiment, the shielding layer 1084 may be disposed on the inner surface of the rear case frame 114a. When the electronic device 1001 is viewed from above, a portion of the shielding layer 1084 may be overlapped with the electronic components 1086. The shielding layer 1084 may shield electromagnetic waves generated by the electronic components 1086. The shielding layer 1084 may prevent interference or distortion of an RF signal transmitted or received from the electronic device 1001 by an electromagnetic wave. In an embodiment, the shielding layer 1084 may block heat generated from the electronic components 1086. The shielding layer 1084 may prevent performance of various components mounted on the printed circuit board 160 from deteriorating due to heat generated from the electronic components 1086. In one embodiment, the shielding layer 1084 may include a metal material such as aluminum or silver, or a polymer composite material such as carbon fiber, carbon nanotubes, and graphene.

11 is an exploded view of a partial configuration of an electronic device according to an exemplary embodiment.

12 is a graph showing radiation efficiency of an electronic device including an antenna pattern according to an exemplary embodiment.

Among the components of FIG. 11, descriptions of components similar to or identical to those of FIG. 10 will be omitted.

In one embodiment, the antenna pattern 1080 may be electrically connected to a connection member (eg, C clip) at the contact 1081. The antenna pattern 1080 may be electrically connected to the contact 1082 of the printed circuit board 160 by the connection member. The contact 1082 may be the power supply unit 162 of the printed circuit board 160 or may be electrically connected to the power supply unit 162. The antenna pattern 1080 may be electrically connected to the power supply unit 162 of the printed circuit board 160 and the wireless communication circuit 102 disposed on the printed circuit board 160.

In an embodiment, the wireless communication circuit 102 may be configured to transmit or receive an RF signal by feeding power to the antenna pattern 1080. Since the antenna pattern 1080 has a shorter electrical path than the metal housing of the electronic device (eg, the metal frame 112), it is difficult to receive a signal of a high frequency band (eg, LTE B7, B38, B40, or B41). May be suitable. For example, referring to FIG. 12, the electronic device 1101 including the antenna pattern 1080 of graph (b) has a higher frequency than the electronic device not including the antenna pattern 1080 of graph (a). The reception efficiency in a band (eg, about 2100 MHz to 3000 MHz) may be higher.

In an embodiment, the wireless communication circuit 102 may receive a signal in the LTE B7 (eg, 2600 MHz) band by feeding power to the antenna pattern 1080. Further, the wireless communication circuit 102 may receive a signal of the same frequency band through the control of the switch circuit 170 described above with respect to FIG. 8. In this case, the wireless communication circuit 102 corresponds to a signal of the LTE B7 band received through the antenna pattern 1080 and a signal of the LTE B7 band received through the metal frame 112 (for example, a diversity signal). Communication performance in the frequency band can be improved.

The electronic device 1101 according to an embodiment may further include an antenna for Bluetooth communication (not shown).

The shielding layer 1084 according to an embodiment may be electrically connected to a connection member (eg, a C clip) at the contact 1085. The shielding layer 1084 may be electrically connected to the contact 1086 of the printed circuit board 160 by the connection member. The contact 1086 may be the first ground 164 of the printed circuit board 160 or may be electrically connected to the first ground 164. The shielding layer 1804 may be electrically connected to the first ground 164 of the printed circuit board 160 through the connection member.

A wearable electronic device (eg, the electronic device 201 of FIG. 2) according to an embodiment forms at least a part of a display (eg, the display 120 of FIG. 2) and a side surface of the wearable electronic device surrounding the display Metal frame (eg, the metal frame 112 of FIG. 2), a battery (eg, the battery 150 of FIG. 2), a conductive support member disposed under the display and supporting the battery (eg, the conductive Support member 130), a printed circuit board (PCB) disposed under the conductive support member and the battery (for example, the printed circuit board 160 of FIG. 2), and a conductive fastening coupling the conductive support member and the PCB A member (eg, the conductive fastening member 134 of FIG. 2), a wireless communication circuit disposed on the PCB (eg, the wireless communication circuit 102 of FIG. 2), and the wireless communication circuit disposed on the PCB and electrically A switch circuit (eg, the switch circuit 170 of FIG. 2) connected to each other, and the PCB includes a first ground (eg, the first ground 164 of FIG. 2) electrically connected to the metal frame, and an opening (opening) (e.g., opening 166 in FIG. 3), A second ground surrounding the opening and spaced apart from the first ground (for example, a second ground 167 in FIG. 3) and a non-conductive region surrounding the second ground (for example, a non-conductive region 168 in FIG. 3) ), wherein the conductive fastening member is coupled to the conductive support member through the opening, and electrically contacts a second ground of the PCB, and the switch circuit is electrically connected to the first ground of the PCB, Electrically connected to the second ground through a designated path, and the wireless communication circuit supplies power to the metal frame to receive an RF signal corresponding to a first center frequency, and controls the switch circuit to change a connection state. It may be set to receive an RF signal corresponding to a second center frequency lower than the first center frequency in response to a change in the connection state.

In an embodiment, the first center frequency may correspond to LTE B5, and the second center frequency may correspond to LTE B12 or B13. In an embodiment, the first center frequency may correspond to LTE B2 or B4, and the second center frequency may correspond to LTE B12 or B13. In an embodiment, the wireless communication circuit may be configured to control the connection state so that the switch circuit electrically separates the first ground and the second ground.

In an embodiment, the wireless communication circuit may be configured to control the connection state so that the switch circuit electrically connects the first ground and the second ground through a first capacitor.

In one embodiment, the wireless communication circuit is set to control the connection state so that the switch circuit electrically connects the first ground and the second ground through a second capacitor, and the second capacitor is the first The capacitance value may be larger than that of a capacitor.

In one embodiment, the wireless communication circuit controls the switch circuit to electrically connect the first ground and the second ground through a first inductor, and corresponds to the third center frequency higher than the first center frequency. It may be set to receive an RF signal.

In one embodiment, the wireless communication circuit controls the connection state so that the switch circuit electrically connects the first ground and the second ground through a second inductor having an inductance value larger than that of the first inductor, and the It may be set to receive an RF signal corresponding to a center frequency higher than the third center frequency.

In one embodiment, the third center frequency may be 2500 MHz or more and 2700 MHz or less.

An electronic device according to an embodiment includes a case (e.g., the rear case 114 of FIG. 10) that is combined with the metal frame to form the rear surface of the wearable electronic device, and is disposed on the inner surface of the case, An antenna pattern (for example, the antenna pattern 1080 of FIG. 10) connected to each other may be further included, and the wireless communication circuit may be configured to feed the antenna pattern to receive an RF signal corresponding to a fourth center frequency.

In an embodiment, the fourth center frequency may be higher than the first center frequency.

In an embodiment, the antenna pattern may be electrically connected to the first ground.

An electronic device according to an embodiment includes a case that is combined with the metal frame to form a rear surface of the wearable electronic device (eg, the rear case 114 of FIG. 10), and at least one electronic component (eg, : Electronic components 1086 of FIG. 10 and a shielding layer (eg, shielding layer 1084 of FIG. 10) disposed between the PCB and the at least one electronic component and formed on the inner surface of the case It may contain more.

In an embodiment, the case includes a case frame forming an inner surface of the case (eg, a rear case frame 114a of FIG. 10) and a rear plate forming at least a portion of the rear surface of the wearable electronic device (eg, FIG. 10 ). The at least one electronic component may be disposed in a space formed by the case frame and the rear plate.

In an embodiment, at least a portion of the shielding layer may overlap the at least one electronic component.

A wearable electronic device (eg, the electronic device 1001 of FIG. 10) according to an embodiment forms at least a part of a display (eg, the display 120 of FIG. 10) and a side surface of the wearable electronic device surrounding the display A metal frame (eg, the metal frame 112 of FIG. 10), a rear case coupled to the metal frame (eg, the rear case 114 of FIG. 10), a battery (eg, the battery 150 of FIG. 10), A conductive support member disposed under the display and supporting the battery (for example, the conductive support member 130 of FIG. 10), and a printed circuit board (PCB) disposed under the conductive support member and the battery (for example, FIG. 10 A printed circuit board of 160), a conductive fastening member that couples the conductive support member and the PCB (for example, the conductive fastening member 134 of FIG. 10), and a wireless communication circuit (eg, FIG. 10) disposed on the PCB. Of the wireless communication circuit 102), an antenna pattern disposed on the inner surface of the rear case and electrically connected to the wireless communication circuit (for example, the antenna pattern 1080 of FIG. 10), and spaced apart from the antenna pattern A shielding layer formed on the inner surface (for example, the shielding layer 1084 in FIG. 10), and a switch circuit (for example, the switch circuit 170 in FIG. 10) disposed on the PCB and electrically connected to the wireless communication circuit. The PCB includes a first ground electrically connected to the metal frame (eg, the first ground 164 of FIG. 10), an opening (eg, the opening 166 of FIG. 3), and the opening A second ground (for example, the second ground 167 in FIG. 3) and a non-conductive region (for example, the non-conductive region 168 in FIG. 3) surrounding the second ground and spaced apart from the first ground Including, the conductive fastening member is coupled to the conductive support member through the opening, and in electrical contact with the second ground of the PCB, the switch circuit is the first of the PCB Electrically connected to the ground, electrically connected to the second ground through a designated path, the wireless communication circuit feeds the metal frame to receive an RF signal corresponding to a first center frequency, and the switch circuit is connected Controls to change a state, and receives an RF signal corresponding to a second center frequency lower than the first center frequency in response to the change of the connection state, and RF corresponding to a third center frequency higher than the first center frequency It may be set to feed the antenna pattern to receive a signal.

In an embodiment, the first center frequency may correspond to LTE B5, and the second center frequency may correspond to LTE B12 or B13.

In an embodiment, the first center frequency may correspond to LTE B2 or B4, and the second center frequency may correspond to LTE B12 or B13.

In an embodiment, the first center frequency may correspond to LTE B2, B4, or B5, and the third center frequency may correspond to LTE B7. In an electronic device according to an embodiment, the rear case includes a rear case frame (for example, the rear case frame 114a of FIG. 10) forming an inner surface of the rear case and at least a part of the rear surface of the wearable electronic device. It includes a rear plate (for example, the rear plate 114b of FIG. 10), wherein the at least one electronic component is disposed in a space formed by the rear case frame and the rear plate, and at least a part of the shielding layer is It may overlap with at least one electronic component.

In the above-described specific embodiments of the present disclosure, components included in the disclosure are expressed in the singular or plural according to the presented specific embodiments. However, the singular or plural expression is selected appropriately for the situation presented for convenience of explanation, and the present disclosure is not limited to the singular or plural constituent elements, and even constituent elements expressed in plural are composed of the singular or Even the expressed constituent elements may be composed of pluralities.

Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, various modifications are possible without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure is limited to the described embodiments and should not be determined, and should be determined by the scope of the claims as well as the equivalents of the claims to be described later.

Claims (20)

In the wearable electronic device,
display;
A metal frame surrounding the display and forming at least a part of a side surface of the wearable electronic device;
battery;
A conductive support member disposed under the display and supporting the battery;
A printed circuit board (PCB) disposed under the conductive support member and the battery;
A conductive fastening member coupling the conductive support member and the PCB;
A wireless communication circuit disposed on the PCB; And
Includes; a switch circuit disposed on the PCB and electrically connected to the wireless communication circuit,
The PCB is:
A first ground electrically connected to the metal frame;
Openings;
A second ground surrounding the opening and spaced apart from the first ground; And
And a non-conductive region surrounding the second ground,
The conductive fastening member is:
Coupled to the conductive support member through the opening,
In electrical contact with the second ground of the PCB and
The switch circuit is:
Electrically connected to the first ground of the PCB,
Electrically connected to the second ground through a designated path,
The wireless communication circuit,
Power supply to the metal frame to receive an RF signal corresponding to the first center frequency,
Control the switch circuit to change the connection state, and
A wearable electronic device configured to receive an RF signal corresponding to a second center frequency lower than the first center frequency in response to a change in the connection state. The method according to claim 1,
The first center frequency corresponds to LTE B5,
The second center frequency corresponds to LTE B12 or B13, a wearable electronic device. The method according to claim 1,
The first center frequency corresponds to LTE B2 or B4,
The second center frequency corresponds to LTE B12 or B13, a wearable electronic device. The method according to claim 1,
The wireless communication circuit is configured to control the connection state so that the switch circuit electrically separates the first ground and the second ground. The method according to claim 1,
The wireless communication circuit is configured to control the connection state so that the switch circuit electrically connects the first ground and the second ground through a first capacitor. The method of claim 5,
The wireless communication circuit is set to control the connection state so that the switch circuit electrically connects the first ground and the second ground through a second capacitor,
The wearable electronic device, wherein the second capacitor has a higher capacitance value than the first capacitor. The method according to claim 1,
The wireless communication circuit controls the switch circuit to electrically connect the first ground and the second ground through a first inductor,
The electronic device, configured to receive an RF signal corresponding to a third center frequency higher than the first center frequency. The method of claim 7,
The wireless communication circuit controls the connection state such that the switch circuit electrically connects the first ground and the second ground through a second inductor having an inductance value greater than that of the first inductor,
The electronic device, configured to receive an RF signal corresponding to a center frequency higher than the third center frequency. The method of claim 7,
The first center frequency corresponds to LTE B2 or B4,
The third center frequency corresponds to LTE B7, a wearable electronic device. The method according to claim 1,
A case coupled to the metal frame to form a rear surface of the wearable electronic device; And
Further comprising an antenna pattern disposed on the inner surface of the case and electrically connected to the wireless communication circuit,
The wireless communication circuit:
The wearable electronic device configured to feed the antenna pattern to receive an RF signal corresponding to a fourth center frequency. The method of claim 10,
The fourth center frequency is higher than the first center frequency. The method of claim 10,
The wearable electronic device, wherein the antenna pattern is electrically connected to the first ground. The method according to claim 1,
A case coupled to the metal frame to form a rear surface of the wearable electronic device;
At least one electronic component disposed under the PCB; And
The wearable electronic device further comprises a shielding layer disposed between the PCB and the at least one electronic component and formed on an inner surface of the case. The method of claim 13,
The case includes a case frame forming an inner surface of the case and a rear plate forming at least a part of a rear surface of the wearable electronic device,
The at least one electronic component is disposed in a space formed by the case frame and the rear plate. The method of claim 13,
At least a portion of the shielding layer overlaps the at least one electronic component. In the wearable electronic device,
display;
A metal frame surrounding the display and forming at least a part of a side surface of the wearable electronic device;
A rear case coupled to the metal frame;
battery;
A conductive support member disposed under the display and supporting the battery;
A printed circuit board (PCB) disposed under the conductive support member and the battery;
A conductive fastening member coupling the conductive support member and the PCB;
A wireless communication circuit disposed on the PCB;
An antenna pattern disposed on the inner surface of the rear case and electrically connected to the wireless communication circuit;
A shielding layer spaced apart from the antenna pattern and formed on the inner surface of the case;
At least one electronic component disposed under the shielding layer; And
Includes; a switch circuit disposed on the PCB and electrically connected to the wireless communication circuit,
The PCB is:
A first ground electrically connected to the metal frame;
Openings;
A second ground surrounding the opening and spaced apart from the first ground; And
And a non-conductive region surrounding the second ground,
The conductive fastening member is:
Coupled to the conductive support member through the opening,
In electrical contact with the second ground of the PCB and
The switch circuit is:
Electrically connected to the first ground of the PCB,
Electrically connected to the second ground through a designated path,
The wireless communication circuit,
Powering the metal frame to receive an RF signal corresponding to the first center frequency,
Control the switch circuit to change the connection state, and
In response to a change in the connection state, an RF signal corresponding to a second center frequency lower than the first center frequency is received, and
The wearable electronic device configured to feed the antenna pattern to receive an RF signal corresponding to a third center frequency higher than the first center frequency. The method of claim 16,
The first center frequency corresponds to LTE B5,
The second center frequency corresponds to LTE B12 or B13, a wearable electronic device. The method of claim 16,
The first center frequency corresponds to LTE B2 or B4,
The second center frequency corresponds to LTE B12 or B13, a wearable electronic device. The method of claim 16,
The first center frequency corresponds to LTE B2, B4, or B5,
The third center frequency corresponds to LTE B7, a wearable electronic device. The method of claim 16,
The rear case further includes a rear case frame forming an inner surface of the rear case and a rear plate forming at least a part of a rear surface of the wearable electronic device,
The at least one electronic component is disposed in a space formed by the rear case frame and the rear plate,
At least a portion of the shielding layer overlaps the at least one electronic component.

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