Electronic device

Abstract

An electronic device provided by the present application comprises a main body, a metal layer and an NFC antenna, both the metal layer and the NFC antenna are installed on the main body, the metal layer is provided with a window, the window penetrates through the metal layer along the thickness direction of the metal layer and is arranged at an interval with the circumferential surface of the metal layer, and the NFC antenna is located at the inner side of the metal layer and is opposite to the metal layer at an interval. The projection of the NFC antenna on the metal layer is located on the inner side of the circumferential face of the metal layer, the antenna comprises a body, and the projection of the body on the metal layer divides the window into two areas.

Description

Technical Field

[0001] The present application relates to the technical field of electronic equipment, and in particular to an electronic equipment. Background Art

[0002] In recent years, with the development of wireless terminals and communication technologies, Near Field Communication (NFC) antennas have been increasingly studied and applied. Electronic devices can use NFC antennas to achieve functions such as electronic payment, intelligent identification, and data transmission. However, electronic devices have many components, and NFC antennas are often covered by metal layers. Since most electromagnetic fields cannot radiate through the metal layer, NFC antennas cannot effectively communicate with the outside world. Summary of the invention

[0003] The present application provides an electronic device, which can solve the technical problem of metal layer shielding near field communication antenna signals in existing electronic devices.

[0004] The present application provides an electronic device, including a main body, a metal layer and an NFC antenna, wherein the metal layer and the NFC antenna are both installed on the main body, the metal layer is provided with a window, the window penetrates the metal layer along the thickness direction of the metal layer and is spaced apart from the circumference of the metal layer, the NFC antenna is located on the inner side of the metal layer, and is opposite to and spaced apart from the metal layer, the projection of the NFC antenna on the metal layer is located on the inner side of the circumference of the metal layer, the antenna includes a main body, and the projection of the main body on the metal layer divides the window into two areas.

[0005] First, when the NFC antenna is powered on, the magnetic flux generated by the NFC antenna can pass through the window of the metal layer and be emitted to the outside of the electronic device, so the metal layer will not completely block the transmission of the antenna signal. In addition, the NFC antenna can also transfer energy to the metal layer through non-contact coupling, so that the metal layer plays a role in assisting the NFC antenna to radiate signals.

[0006] Secondly, during the assembly of the metal layer and the display screen, compared with the open window connected to the edge of the metal layer by a gap, the closed window in the metal layer shown in this embodiment can ensure that the metal layer and the display screen are smoothly pressed together, avoiding the situation where the metal layer produces discontinuous marks due to the gap connecting the window and the edge of the metal layer, thereby failing to fully fit with the display screen.

[0007] Then, the window opened in the metal layer is a closed window, which can also ensure the integrity of the metal layer and avoid setting a gap between the window and the edge of the metal layer, thereby reducing the aesthetics of the metal layer as the back cover of the electronic device.

[0008] In one embodiment, the NFC antenna includes a protrusion, which is connected to the body and protrudes toward the outside of the NFC antenna or toward the inside of the NFC antenna, and a projection of the protrusion on the metal layer at least partially falls into one of the areas.

[0009] In this embodiment, a protrusion is provided to reduce the magnetic flux passing through another area near an area, so that the canceling effect of the magnetic field of the other area on the magnetic field of the area is weakened (the magnetic fields of the two areas are in opposite directions). Therefore, the total magnetic flux of the NFC antenna through the area covered by the receiving end is increased, and the antenna signal transmitted by the electronic device is enhanced, so that the regional limitation of effective card swiping is weakened, the effective card swiping area is increased, and it is conducive to realizing short-range communication of electronic devices.

[0010] In one embodiment, the protrusion includes a plurality of first connecting segments, the plurality of first connecting segments are sequentially connected end to end, and a projection of at least one of the first connecting segments on the metal layer is at least partially located within the window.

[0011] In one embodiment, the protrusion further includes a second connecting segment, and the second connecting segment is located on the inner side of the plurality of first connecting segments and connected between the plurality of first connecting segments.

[0012] In one embodiment, the second connecting segment completely fills the inner sides of the plurality of first connecting segments.

[0013] In one embodiment, the protrusion also includes a plurality of third connecting segments, which are fixedly connected to the body and connected end to end in sequence, and the plurality of third connecting segments are located on the outside of the plurality of first connecting segments, and are arranged around the plurality of first connecting segments, and are spaced apart from the plurality of first connecting segments.

[0014] In one embodiment, along the width direction of the electronic device, the protruding portion includes two side edges arranged opposite to each other, and both ends of the projections of the two side edges on the metal layer are located outside the window.

[0015] In one embodiment, the electronic device further includes a display component, which is installed on one side of the main body and covers the NFC antenna. The display component includes a display screen and the metal layer, and the metal layer is installed on a surface of the display screen facing the main body.

[0016] In one embodiment, the display screen includes a plurality of source lines, all of which extend along the length direction of the electronic device and are arranged at intervals along the width direction of the electronic device; and a dimension of the raised portion in the length direction of the electronic device is less than or equal to 10 mm.

[0017] As for the NFC antenna provided in the second embodiment of the present application, the length dimensions of the first section and the second section of the first protrusion are both less than or equal to 10 mm, so as to avoid interference with the normal operation of the source line in the first display screen due to mutual inductance, so that the current passing through the source line exceeds the limit of the normal use range, thereby improving the use stability of the electronic device.

[0018] In one embodiment, the electronic device is a small foldable mobile phone, and the display screen is a secondary screen of the electronic device.

[0019] In one embodiment, the electronic device is an outward-folding mobile phone, and the display screen is a folding screen of the electronic device.

[0020] In one embodiment, the electronic device further includes a back cover, the back cover is mounted on one side of the main body and covers the NFC antenna, and the back cover includes the metal layer.

[0021] The window opened in the metal layer provided in the embodiment of the present application is a closed window, which can also ensure the integrity of the metal layer and avoid setting a gap between the window and the edge of the metal layer, thereby reducing the aesthetics of the metal layer as the back cover of the electronic device.

[0022] In one embodiment, the electronic device further includes a shielding plate, wherein the shielding plate is located on a side of the NFC antenna facing away from the metal layer, and a projection of the shielding plate on the metal layer completely covers the window.

[0023] The shielding plate provided in this embodiment can enhance the electromagnetic radiation intensity of the NFC antenna to the first display screen.

[0024] In one embodiment, the electronic device further includes a main board, which is mounted on the main body and located on a side of the shielding plate facing away from the NFC antenna.

[0025] The shielding plate provided in the present application can shield the electromagnetic radiation generated by the NFC antenna toward the circuit board, so as to protect other electronic devices around the NFC antenna and prevent other electronic devices around the NFC antenna from being subjected to electromagnetic interference from the NFC antenna.

[0026] In one embodiment, the electronic device further includes an antenna circuit board, the antenna circuit board includes an insulating substrate and the NFC antenna, the NFC antenna is arranged on one side of the insulating substrate, and the NFC antenna is formed by electroplating a metal layer on a surface of the insulating substrate and etching the metal layer.

[0027] The electronic device provided in the present application opens a closed window on the metal layer, so that the magnetic flux generated by the NFC antenna can radiate outward through the metal layer, and the metal layer can assist the NFC antenna in radiating signals through non-contact coupling. The closed window can also ensure the smooth pressing of the metal layer and the display screen or ensure the integrity and aesthetics of the metal layer as a back cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0029] Figure 1 A schematic diagram of the structure of an electronic device in an unfolded state provided by the first embodiment of the present application;

[0030] Figure 2 for Figure 1 an exploded structural diagram of the electronic device shown;

[0031] Figure 3 for Figure 2 A schematic diagram of the structure of the antenna assembly shown;

[0032] Figure 4 for Figure 1 A schematic diagram of a portion of the structure of the electronic device shown;

[0033] Figure 5 for Figure 1 a simulated schematic diagram of the electronic device shown;

[0034] Figure 6 A schematic diagram of the structure of an NFC antenna in an electronic device provided in the second embodiment of the present application;

[0035] Figure 7 A schematic diagram of a partial structure of an electronic device provided in a second embodiment of the present application;

[0036] Figure 8 A simulation schematic diagram of an electronic device provided in the second embodiment of the present application;

[0037] Fig. 9 A schematic diagram of the structure of an NFC antenna in an electronic device provided in the third embodiment of the present application;

[0038] Fig.10 A simulation schematic diagram of an electronic device provided in the third embodiment of the present application;

[0039] Fig.11 A schematic diagram of the structure of an NFC antenna in an electronic device provided in the fourth embodiment of the present application;

[0040] Fig.12A simulation schematic diagram of an electronic device provided in the fourth embodiment of the present application;

[0041] Fig.13 A schematic diagram of the structure of an NFC antenna in an electronic device provided in the fifth embodiment of the present application;

[0042] Fig.14 A partial structural diagram of an electronic device provided in a fifth embodiment of the present application;

[0043] Fig.15 A schematic diagram of the structure of an NFC antenna in an electronic device provided in a sixth embodiment of the present application;

[0044] Fig.16 A partial structural diagram of an electronic device provided in a sixth embodiment of the present application;

[0045] Fig.17 A schematic diagram of the structure of an NFC antenna in an electronic device provided in the seventh embodiment of the present application;

[0046] Fig.18 A partial structural diagram of an electronic device provided in a seventh embodiment of the present application;

[0047] Fig.19 A schematic diagram of the structure of an electronic device provided in the eighth embodiment of the present application;

[0048] Fig. 20 A schematic diagram of the structure of an electronic device provided in the ninth embodiment of the present application. DETAILED DESCRIPTION

[0049] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0050] The present application provides an electronic device, which may be a monitor, a handheld wireless communication device, a desktop computer, a laptop, a tablet device, an ultra-mobile personal computer (UMPC), a handheld computer, a netbook, a POS (point of sales, sales point information management system) machine, a personal digital assistant (PDA) and other mobile terminals, fixed terminals or foldable devices. The electronic device of the present application is described in detail by taking a handheld wireless communication device as an example. Among them, the handheld wireless communication device may be a mobile phone.

[0051] See also Figure 1 and Figure 2 , Figure 1 This is a schematic structural diagram of the electronic device 100 provided in the first embodiment of the present application in an unfolded state. Figure 2 for Figure 1 An exploded structural diagram of the electronic device 100 is shown.

[0052] The electronic device 100 provided in the first embodiment of the present application may be a small folding mobile phone. It should be noted that when the small folding mobile phone is in the unfolded state, Figure 1 As shown, the size of the small foldable phone in the unfolded state is substantially equivalent to that of a straight phone. When the small foldable phone is in the folded state, the size of the small foldable phone is substantially equivalent to half the size of a straight phone. At this time, the size of the small foldable phone is small and easy to carry.

[0053] The electronic device 100 includes a first display component 11, a second display component 12, an antenna component 20, a main body 30 and a main board 40. The first display component 11, the second display component 12, the antenna component 20 and the main board 40 are all installed on the main body 30. For the convenience of description, the definition Figure 1 The width direction of the electronic device 100 is the X-axis direction, the length direction of the electronic device 100 is the Y-axis direction, and the thickness direction of the electronic device 100 is the Z-axis direction. The X-axis direction, the Y-axis direction, and the Z-axis direction are perpendicular to each other. The terms "inside" and "outside" mentioned in the description of the embodiments of the present application are based on the attached specification. Figure 1 The description of the orientation shown uses the direction away from the interior of the electronic device 100 as “outside” and the direction toward the interior of the electronic device 100 as “inside”, which does not constitute a limitation on the electronic device 100 in actual application scenarios.

[0054] The main body 30 includes a first shell 31, a second shell 32 and a rotating mechanism 33, and the rotating mechanism 33 is connected between the first shell 31 and the second shell 32. The first shell 31 and the second shell 32 can rotate relative to each other through the rotating mechanism 33, so that the electronic device 100 can switch between a folded state, an intermediate state and an unfolded state to meet the user's usage needs in different scenarios. The first shell 31 is provided with a receiving groove 34, and the receiving groove 34 is provided on a surface of the first shell 31 along the thickness direction and is recessed along the thickness direction of the first shell 31. The mainboard 40 and the antenna assembly 20 are both installed in the receiving groove 34. Specifically, the mainboard 40 is installed on the bottom wall of the receiving groove 34, and the antenna assembly 20 is installed on the side of the mainboard 40 away from the bottom wall of the receiving groove 34.

[0055] The second display assembly 12 includes a first portion 121, a second portion 122, and a third portion 123. When the second display assembly 12 is in the unfolded state, the first portion 121, the third portion 123, and the second portion 122 are arranged in sequence along the Y-axis direction, the third portion 123 is connected between the first portion 121 and the second portion 122, and the third portion 123 is flexible and can be bent around the X-axis direction. Among them, the second display assembly 12 includes a second display screen 124. The second display screen 124 can be a flexible screen that can be folded as a whole, or the portion of the second display screen 124 located in the third portion 123 is a flexible display screen, and the portion of the second display screen 124 located in the first portion 121 and the second portion 122 is a rigid screen, and there is no strict restriction on this.

[0056] In this embodiment, the second display screen 124 includes but is not limited to an organic light-emitting diode (OLED) display screen, an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED) display screen, a mini organic light-emitting diode (miniorganic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, a micro organic light-emitting diode (micro organic light-emitting diode) display screen, and a quantum dot light emitting diode (quantum dot light emitting diodes, QLED) display screen.

[0057] The second display assembly 12 is installed on the side of the main body 30 away from the opening of the accommodating groove 34 in the thickness direction. The first part 121 is installed on the first shell 31, the second part 122 is installed on the second shell 32, and the third part 123 is arranged opposite to the rotating mechanism 33. In the process of the electronic device 100 switching from the unfolded state to the folded state, the first shell 31 and the second shell 32 can rotate relative to each other through the rotating mechanism 33, so that they are close to each other until they fit together, driving the first part 121 and the second part 122 to be close to each other, and the third part 123 is bent. At this time, the second display assembly 12 is folded inward, and the electronic device 100 has a smaller volume, so that it is convenient for users to store and carry it. In the process of the electronic device 100 switching from the folded state to the unfolded state, the first shell 31 and the second shell 32 can also rotate relative to each other through the rotating mechanism 33, so that they are away from each other, and the angle between the first shell 31 and the second shell 32 is getting larger and larger, driving the first part 121 and the second part 122 to move away from each other, and the third part 123 is unfolded. When the angle between the first housing 31 and the second housing 32 is equal to 180 degrees (within the tolerance range), the electronic device 100 is in the unfolded state. At this time, the electronic device 100 can use the second display assembly 12 to realize large-screen display to provide rich information to the user.

[0058] The first display assembly 11 is installed on a side of the first housing 31 away from the second display assembly 12 in the thickness direction, and the first display assembly 11 covers the accommodating groove 34 and the antenna assembly 20. It can be understood that no matter the electronic device 100 is in a folded state, an intermediate state or an unfolded state, the first display assembly can realize a small-screen display to provide users with richer information and bring users a better use experience.

[0059] The first display assembly 11 includes a first display screen 13 and a metal layer 14, and the metal layer 14 is installed on one side of the first display screen 13. Among them, the first display screen 13 can be a rigid screen or a flexible screen. The first display screen 13 includes a display surface 131 and a mounting surface 132, and the display surface 131 is used to display information such as text, images, and videos. Along the thickness direction of the first display screen 13, the mounting surface 132 is arranged opposite to the display surface 131, the mounting surface 132 is arranged toward the accommodating groove 34, and the display surface 131 is arranged away from the accommodating groove 34. The first display screen 13 includes a plurality of source lines 133. The plurality of source lines 133 all extend along the Y-axis direction and are arranged at intervals along the X-axis direction.

[0060] The metal layer 14 is arranged on the mounting surface 132 of the first display screen 13, and is used to carry and protect the first display screen 13 to prevent the first display screen 13 from being squeezed and damaged or being interfered by electromagnetic waves generated by other electronic components in the main body 30. Exemplarily, the metal layer 14 can be made of copper or titanium alloy. The metal layer 14 is provided with a window 15. The window 15 penetrates the metal layer 14 along the thickness direction of the metal layer 14. The window 15 is opened in the middle area of ​​the metal layer 14. Among them, the window 15 is a closed window, that is, the window 15 is spaced apart from the edge of the metal layer 14. In this embodiment, the window 15 is rectangular. In some other embodiments, the window 15 can also be circular, elliptical or triangular, and the specific shape is not limited. During the assembly of the metal layer 14 and the first display screen 13, compared with the open window connected to the edge of the metal layer 14 through the gap, the closed window 15 in the metal layer 14 shown in this embodiment can ensure that the metal layer 14 and the first display screen 13 are smoothly pressed together, avoiding the situation where the metal layer 14 produces discontinuous marks due to the gap connecting the window 15 and the edge of the metal layer 14, thereby failing to fully fit with the first display screen 13.

[0061] Please also read Figure 3 , Figure 3 for Figure 2 A schematic structural diagram of the antenna assembly 20 is shown.

[0062] The antenna assembly 20 includes a shielding plate 21 and an NFC antenna 23. The NFC antenna 23 is arranged on the side of the mainboard 40 away from the bottom wall of the accommodating groove 34, and the shielding plate 21 is located between the mainboard 40 and the NFC antenna 23. The shielding plate 21 can be a ferrite sheet or a magnetic nano-chip. The shielding plate 21 can shield the electromagnetic radiation generated by the NFC antenna 23 toward the mainboard 40 to protect other electronic devices around the NFC antenna 23, prevent other electronic devices around the NFC antenna 23 from being electromagnetically interfered by the NFC antenna 23, and at the same time improve the electromagnetic radiation intensity of the NFC antenna 23 to the first display screen 13.

[0063] In this embodiment, the NFC antenna 23 has a rectangular ring structure. In other embodiments, the NFC antenna 23 may also be in a circular ring or an elliptical ring, and the specific shape is not limited. In this embodiment, the NFC antenna 23 is formed by etching the copper clad layer of the printed circuit board. Among them, the printed circuit board includes an insulating substrate and a metal layer. Exemplarily, the metal layer may be a copper layer, and the metal layer may be provided on the surface of the insulating substrate by an electroplating process. A patterned antenna structure, such as the NFC antenna 23, can be formed by etching the metal layer. The NFC antenna in the embodiment of the present application has a coil structure. In other embodiments, the NFC antenna 23 may also be prepared by printing a conductive silver paste on a flexible printed circuit (Flexible Printed Circuit, FPC), or the NFC antenna 23 may be formed by winding a conductive wire such as a copper wire around several circles, and the specific preparation method is not limited.

[0064] See also Figure 4 and Figure 5 , Figure 4 for Figure 1 The schematic diagram of a part of the structure of the electronic device 100 is shown, wherein: Figure 4 Only the antenna assembly 20 and the metal layer 14 in the electronic device 100 are shown; Figure 5 for Figure 1 The simulation schematic diagram of the electronic device 100 is shown, wherein: Figure 5 Only antenna assembly 20 and metal layer 14 in electronic device 100 are shown.

[0065] The transmitting side of the NFC antenna 23 faces the metal layer 14 of the first display component 11. In other words, the metal layer 14 is located on the transmitting side of the NFC antenna 23. Along the thickness direction of the electronic device 100, the NFC antenna 23 and the metal layer 14 are spaced and arranged opposite to each other, and part of the NFC antenna 23 is exposed from the window 15. Along the thickness direction of the first shell 31, the projection of the shielding plate 21 on the metal layer 14 completely covers the window 15, and the projection of the NFC antenna 23 on the metal layer 14 is located on the inner side of the circumference of the metal layer 14, and the window 15 is divided into two areas. The two areas are the first area A and the second area B. In this embodiment, the orthographic projection of the straight edge of the NFC antenna 23 extending along the X-axis direction on the metal layer 14 divides the window 15 into the first area A and the second area B, and the first area A and the second area B are spaced apart along the Y-axis direction.

[0066] When the NFC antenna 23 is powered on, the magnetic flux generated by the NFC antenna 23 can pass through the window 15 of the metal layer 14 and be emitted to the outside of the electronic device 100, so the metal layer 14 will not completely block the emission of the signal of the NFC antenna 23. In addition, the NFC antenna 23 can also transfer energy to the metal layer 14 by non-contact coupling, so that the metal layer 14 plays a role in assisting the NFC antenna 23 in radiating signals.

[0067] Specifically, for the convenience of description, define Figure 1 In the electronic device 100 shown, the direction in which the first display component 11 points to the second display component 12 is the positive direction of the Z axis, and the direction in which the second display component 12 points to the first display component 11 is the negative direction of the Z axis.

[0068] The following are examples: Figure 5 As shown, when the current flows from the left side to the right side of the paper (i.e., the current flows clockwise in the NFC antenna 23) in the straight edge extending along the X-axis direction of the window 15 where the NFC antenna 23 is exposed, a magnetic field perpendicular to the inward direction of the window 15 (the positive direction of the Z axis) is generated in the first area A of the window 15, and a magnetic field perpendicular to the outward direction of the window 15 (the negative direction of the Z axis) is generated in the second area B of the window 15. The magnetic field of the NFC antenna 23 in the first area A is opposite to the magnetic field in the second area B.

[0069] If the current in the NFC antenna 23 changes, the magnetic flux generated by the current will also change. When the magnetic flux of the NFC antenna 23 at the window 15 changes, the metal layer 14 can receive the energy of the NFC antenna 23 through non-contact coupling, and generate an induced current at the edge of the window 15 to offset the magnetic flux change at the metal edge. Figure 5 The direction of the induced current can be determined according to Lenz's law, that is, the magnetic field generated by the induced current always offsets the change in the magnetic flux that causes the induced current. The magnetic field generated by the induced current can assist the NFC antenna 23 in transmitting signals.

[0070] For example, if the current in the NFC antenna 23 decreases, the magnetic flux generated by the current will also decrease. The magnetic flux of the NFC antenna 23 in the first area A decreases, and an induced current in the clockwise direction will be generated at the edge of the first area A; the magnetic flux of the NFC antenna 23 in the second area B decreases, and an induced current in the counterclockwise direction will be generated at the edge of the second area B. The induced current generated at the edge of the first area A and the induced current generated at the edge of the second area B just form two closed current loops in opposite directions with the current on the NFC antenna 23. The magnetic fields generated by the two closed current loops can enhance the magnetic field of the first area A and the magnetic field of the second area B respectively.

[0071] See also Figure 6 and Figure 7 , Figure 6 This is a schematic diagram of the structure of the NFC antenna 23 in the electronic device 100 provided in the second embodiment of the present application. Figure 7 A schematic diagram of a partial structure of an electronic device 100 provided in the second embodiment of the present application.

[0072] like Figure 6As shown, the NFC antenna 23 in the electronic device 100 shown in this embodiment is different from the NFC antenna 23 in the electronic device 100 shown in the first embodiment in that the NFC antenna 23 includes a body and a protrusion, the protrusion is connected to the body and protrudes toward the outside of the NFC antenna 23, or protrudes toward the inside of the NFC antenna 23. In this embodiment, the body at least includes a first body 2411, and the protrusion includes at least a first protrusion 25. The first body 2411 extends along the X-axis direction, the first protrusion 25 is connected to the first body 2411, and protrudes in a direction away from the center of the NFC antenna 23, wherein the first body 2411 and the first protrusion 25 surround and form a first coil portion 241, and the first coil portion 241 is the outermost part of the NFC antenna 23. The first protrusion 25 includes a plurality of first connecting segments, and the plurality of first connecting segments are sequentially connected to one side of the first body 2411. In this embodiment, the first protrusion 25 is in a rectangular ring shape, and there are three first connecting sections, which are the first section 251, the second section 252 and the third section 253. One end of the first section 251 is connected to the first body 2411, and the other end extends along the Y-axis direction; one end of the second section 252 is connected to the first body 2411, and the other end extends along the Y-axis direction. The third section 253 extends along the X-axis direction, and the third section 253 is connected between the first section 251 and the second section 252. In some other embodiments, the first protrusion can also be in a triangular ring shape or a semicircular ring shape, or a solid rectangle or a solid semicircle or a solid triangle, and the specific shape is not limited. The first connecting section can also have two, four or more than four, and the specific number is not limited.

[0073] like Figure 7 As shown, the first section 251 and the second section 252 extend along the Y-axis direction, and are the same as the extension direction of the multiple source lines 133 set in the first display screen 13 of the first display component 11. The current-carrying wires set in the same direction are easy to affect each other due to the mutual inductance phenomenon. The length dimensions (dimensions along the Y-axis direction) of the first section 251 and the second section 252 of the first protrusion 25 are both less than or equal to 10mm, so as to avoid interference with the normal operation of the source line 133 in the first display screen 13 due to the mutual inductance phenomenon, so that the current passing through the source line 133 exceeds the limit of the normal use range, thereby improving the use stability of the electronic device 100. In other embodiments, the dimension of the protrusion along the length direction of the electronic device 100 should be less than or equal to 10mm.

[0074] Please also read Figure 6 and Figure 8 , Figure 8 This is a simulation diagram of an electronic device 100 provided in the second embodiment of the present application, wherein: Figure 8 Only antenna assembly 20 and metal layer 14 in electronic device 100 are shown.

[0075] The orthographic projection of the body of the NFC antenna 23 on the metal layer 14 divides the window 15 into a first area A and a second area B. The projection of the first protrusion 25 along the Z-axis direction completely falls into the second area B of the window 15. The first protrusion 25 roughly divides the second area B of the window 15 into two sub-areas, namely, a middle area B1 and an edge area B2. The middle area B1 is an area enclosed by the first protrusion 25 and the straight edge extending along the X-axis direction of the NFC antenna 23, and the edge area B2 is an area in the second area B where the first protrusion 25 is away from the middle area B1, and the edge area B2 is arranged around the middle area B1.

[0076] The first protrusion 25 can reduce the magnetic flux of the second area B and increase the effective card swiping area of ​​the electronic device 100. The specific description is as follows: when the current flows from the left side of the paper to the right side (i.e., the current flows clockwise in the NFC antenna 23) in the straight edge extending along the X-axis direction of the window 15 where the NFC antenna 23 is exposed, a magnetic field perpendicular to the inward direction of the window 15 (the positive direction of the Z axis) is generated in the first area A of the window 15, and a magnetic field perpendicular to the outward direction of the window 15 (the negative direction of the Z axis) is generated in the second area B of the window 15. At the same time, in the third section 253 of the first protrusion 25, the current also flows from the left side of the paper to the right side. The current in the third section 253 generates a magnetic field perpendicular to the inward direction of the window 15 (the positive direction of the Z axis) in the middle area B1. Therefore, in the middle area B1, the magnetic field generated by the straight edge of the part of the NFC antenna 23 that exposes the window 15 is opposite to the magnetic field generated by the third section 253 of the first protrusion 25, and cancels each other.

[0077] When the electronic device 100 acts as a transmitter of a short-range communication antenna and interacts with a receiver of a short-range communication antenna, such as a card reader, the receiver usually covers part of the window 15. When the receiver covers the first area A and the surrounding area, the signal strength of the NFC antenna 23 received by the receiver is positively correlated with the total magnetic flux of the first area A and the surrounding area. Figure 5As shown, the magnetic field of the NFC antenna 23 in the second area B and the magnetic field of the first area A are concentrated on the opposite sides of the straight edge extending along the X-axis direction of the window 15 where the NFC antenna 23 is exposed, and the magnetic field of the second area B is adjacent to the magnetic field of the first area A. Therefore, when the receiving end communicates with the electronic device 100, it is easy to cover most of the magnetic fields of the first area A and the second area B at the same time. However, the magnetic field in the second area B is opposite to the magnetic field in the first area A, and the absolute value of the magnetic field strength is similar, so the total magnetic flux of the NFC antenna 23 through the receiving end coverage area is easy to be too small, which is not conducive to the signal transmission of the close-range communication between the NFC antenna 23 and the receiving end, and it is difficult to form an effective card swipe. It can be understood that only when the receiving end mainly covers the magnetic field of the first area A or mainly covers the magnetic field of the second area B, the total magnetic field strength of the NFC antenna 23 through the receiving end coverage area is sufficient to transmit the signal and form an effective card swipe. Therefore, the area of ​​the electronic device 100 in the first embodiment that can form an effective card swipe is greatly limited, so the effective card swipe area is small.

[0078] Compared with the first embodiment, the present embodiment sets the first protrusion 25 so that the third section 253 of the first protrusion 25 and the straight side current direction of the window 15 where the NFC antenna 23 is exposed are the same, and the magnetic fields in the area between the two unidirectional conductors cancel each other out, so that the magnetic flux passing through the second area B near the first area A is reduced, and the canceling effect of the magnetic field of the second area B near the first area A on the magnetic field of the first area A becomes weaker (the magnetic field of the first area A is in opposite directions to the magnetic field of the second area B). Therefore, the total magnetic flux of the NFC antenna 23 through the receiving end coverage area is increased, and the antenna signal transmitted by the electronic device 100 is enhanced, so that the regional limitation of effective card swiping is weakened, and the effective card swiping area is enlarged, which is conducive to realizing short-range communication of the electronic device 100.

[0079] In other embodiments, the protrusion may also protrude toward the inner side of the NFC antenna 23, and the projection of the protrusion on the metal layer 14 at least partially falls into the first area A of the window 15. The magnetic field generated by the protrusion will reduce the magnetic flux of the first area A near the second area B, so that the magnetic field of the first area A near the second area B weakens the offsetting effect of the magnetic field of the second area B on the magnetic field of the second area B (the magnetic field of the first area A is in opposite directions to the magnetic field of the second area B). Therefore, the total magnetic flux of the NFC antenna 23 covering the area through the receiving end is increased, and the antenna signal transmitted by the electronic device 100 is enhanced, so that the regional limitation of effective card swiping is weakened, and the effective card swiping area is increased, which is conducive to realizing close range communication of the electronic device 100.

[0080] See also Fig. 9 and Fig.10 , Fig. 9 This is a schematic diagram of the structure of the NFC antenna 23 in the electronic device 100 provided in the third embodiment of the present application. Fig.10This is a simulation diagram of an electronic device 100 provided in the third embodiment of the present application, wherein: Fig.10 Only antenna assembly 20 and metal layer 14 in electronic device 100 are shown.

[0081] like Fig. 9 As shown, the difference between this embodiment and the second embodiment is that the first protrusion 25 is roughly in the shape of a "four". Specifically, the first protrusion 25 also includes a fourth section 254, a fifth section 255, a sixth section 256 and a seventh section 257. The fourth section 254 and the fifth section 255 are both connected to the first body 2411 at one end, and the other end extends along the Y-axis direction. Along the X-axis direction, the fourth section 254 is located on the side of the first section 251 away from the second section 252, and the fifth section 255 is located on the side of the second section 252 away from the first section 251. It can be understood that the fourth section 254, the first section 251, the second section 252 and the fifth section 255 are arranged in sequence along the X-axis direction. The sixth section 256 and the seventh section 257 both extend along the X-axis direction, the sixth section 256 is connected between the first section 251 and the fourth section 254, and the seventh section 257 is connected between the second section 252 and the seventh section 257. In this embodiment, the sixth section 256 and the seventh section 257 may be extensions of two ends of the third section 253 along the X-axis direction.

[0082] like Fig.10 As shown, the orthographic projection of the first protrusion 25 on the metal layer 14 partially falls into the second area B of the window 15. Specifically, the orthographic projections of the first segment 251, the second segment 252, the third segment 253, and part of the sixth segment 256 and part of the seventh segment 257 of the first protrusion 25 fall into the window 15. It can be understood that the orthographic projections of the fourth segment 254 and the fifth segment 255 of the first protrusion 25 do not fall into the window 15. The sixth segment 256, the third segment 253 and the seventh segment 257 of the first protrusion 25 roughly divide the second area B of the window 15 into two sub-areas, the two sub-areas are respectively the middle area B1 and the edge area B2, the middle area B1 and the edge area B2 are arranged at intervals along the Y axis, and the edge area B2 is located on the side of the middle area B1 away from the first area A.

[0083] When the NFC antenna 23 is powered on, the straight edge of the NFC antenna 23 extending along the X-axis direction is in the same direction as the current in the sixth segment 256, the third segment 253 and the seventh segment 257 of the first protrusion 25. Therefore, in the middle area B1, the direction of the magnetic field generated by the straight edge is opposite to the direction of the magnetic field generated by the sixth segment 256, the third segment 253 and the seventh segment 257 sequentially connected along the X-axis, and they cancel each other out. Therefore, the magnetic flux in the middle area B1 of the window 15 is reduced, and the magnetic flux of the second area B near the first area A is reduced, so that the magnetic field of the second area B near the first area A weakens the canceling effect of the magnetic field of the first area A. Therefore, the total magnetic flux of the NFC antenna 23 through the receiving end coverage area is increased, and the antenna signal transmitted by the electronic device 100 is enhanced, which is conducive to the realization of close range communication of the electronic device 100.

[0084] Compared with the second embodiment, the present embodiment expands the area surrounded by the first protrusion 25 by adding the sixth section 256 and the seventh section 257 as well as the fourth section 254 and the fifth section 255, further reduces the residual magnetic field of the NFC antenna 23 in the corner of the second area B close to the first area A, weakens the offsetting effect of the magnetic field of the second area B near the first area A on the magnetic field of the first area A, increases the total magnetic flux of the NFC antenna 23 through the coverage area of ​​the receiving end, enhances the antenna signal of short-range communication, weakens the regional limitation of effective card swiping, and increases the effective card swiping area.

[0085] See also Fig.11 and Fig.12 , Fig.11 This is a schematic diagram of the structure of the NFC antenna 23 in the electronic device 100 provided in the fourth embodiment of the present application. Fig.12 This is a simulation diagram of an electronic device 100 provided in the fourth embodiment of the present application, wherein: Fig.12 Only antenna assembly 20 and metal layer 14 in electronic device 100 are shown.

[0086] like Fig.11 As shown, the difference between this embodiment and the second embodiment is that the first protrusion 25 is in the shape of a rectangular sheet. The first protrusion 25 includes a first side 256, a second side 257, a third side 258 and a fourth side 259. The first side 256 and the second side 257 are arranged opposite to each other along the X-axis direction and both extend along the Y-axis direction; the third side 258 and the fourth side 259 are arranged opposite to each other along the Y-axis direction and both extend along the X-axis direction and are connected between the first side 256 and the second side 257. It can be understood that Fig.11As shown by the dotted line, the first protrusion 25 of this embodiment can be regarded as further including a second connecting section 25A on the basis of the second embodiment. The second connecting section 25A is connected between the plurality of the first connecting sections and fills the space formed by the plurality of the first connecting sections in sequence. In this embodiment, the second connecting section 25A is between the first section 251, the second section 252 and the third section 253. The second connecting section 25A of this embodiment is in the shape of a rectangular sheet and completely fills the space formed by the first section 251, the second section 252 and the third section 253 and is connected to the body. The second connecting section 25A, the first section 251, the second section 252 and the third section 253 together form the rectangular sheet-shaped first protrusion 25 of this embodiment. The first side 256 is the side of the first section 251 away from the second section 252, the second side 257 is the side of the second section 252 away from the first section 251, the third side 258 is the side of the third section 253 away from the second connecting section 25A, and the fourth side 259 is the side of the second connecting section 25A away from the third section 253. In other embodiments, the second connecting section 25A may be in any shape, or may only partially fill the space formed by the first section 251, the second section 252, and the third section 253, and the specific shape and size are not limited.

[0087] like Fig.12 As shown, the orthographic projection of the first protrusion 25 on the metal layer 14 partially falls into the second area B of the window 15. Specifically, the orthographic projection of part of the third side 258 and part of the fourth side 259 of the first protrusion 25 and the area between the third side 258 and the fourth side 259 fall into the window 15. It can be understood that the first side 256 and the second side 257 of the first protrusion 25 do not fall into the window 15.

[0088] When the NFC antenna 23 is powered, since there is only a tangential magnetic field on the metal surface of the wire, only the third side 258 of the first protrusion 25 that is exposed to the window 15 will generate a magnetic field in the second area B of the window 15. The area between the third side 258 and the fourth side 259 that is exposed to the window 15 does not generate a magnetic field. For example, when the current of the NFC antenna 23 flows clockwise, the current flows from the left side to the right side of the paper in the fourth side 259, the third side 258 of the first protrusion 25, and the straight side of the window 15 where the NFC antenna 23 is exposed. The current in the fourth side 259 and the straight side of the window 15 where the NFC antenna 23 is exposed generates a magnetic field perpendicular to the window 15 inward (positive direction of the Z axis) in the first area A of the window 15, and the current of the third side 258 generates a magnetic field perpendicular to the paper outward (negative direction of the Z axis) only in the area of ​​the second area B of the window 15 that is not covered by the first protrusion 25.

[0089] In this embodiment, a sheet-shaped first protrusion 25 is provided to partially cover the second area of ​​the window 15 to reduce the magnetic flux of the second area B near the first area A, so that the magnetic field of the second area B near the first area A weakens the offsetting effect of the magnetic field of the first area A (the magnetic field of the first area A is in opposite directions to the magnetic field of the second area B). Therefore, the total magnetic flux of the NFC antenna 23 through the receiving end coverage area is increased compared with the total magnetic flux of the first embodiment, the antenna signal transmitted by the electronic device 100 is enhanced, the regional limitation of effective card swiping is weakened, the effective card swiping area is increased, and it is conducive to realizing short-range communication of the electronic device 100.

[0090] See also Fig.13 and Fig.14 , Fig.13 This is a schematic diagram of the structure of the NFC antenna 23 in the electronic device 100 provided in the fifth embodiment of the present application. Fig.14 This is a partial structural diagram of an electronic device 100 provided in the fifth embodiment of the present application, wherein: Fig.14 Only antenna assembly 20 and metal layer 14 in electronic device 100 are shown.

[0091] The difference between this embodiment and the second embodiment is that the orthographic projection of the first protrusion 25 on the metal layer 14 only partially falls into the second area B of the window 15. Specifically, the projection of part of the third segment 253 of the first protrusion 25 falls into the window 15, while the orthographic projections of the first segment 251 and the second segment 252 do not fall into the window 15.

[0092] See also Fig.15 and Fig.16 , Fig.15 This is a schematic diagram of the structure of the NFC antenna 23 in the electronic device 100 provided in the sixth embodiment of the present application. Fig.16 This is a partial structural diagram of an electronic device 100 provided in the sixth embodiment of the present application. Fig.16 Only antenna assembly 20 and metal layer 14 in electronic device 100 are shown.

[0093] The difference between this embodiment and the fifth embodiment is that the body further includes a second body 2421, and the protrusion further includes a second protrusion 26. The second protrusion 26 is connected to a straight edge of the second body 2421 extending along the X-axis direction, and protrudes in a direction away from the center of the NFC antenna 23. In this embodiment, the second body 2421 is inside the first body 2411, and the second protrusion 26 is inside the first protrusion 25, and the second protrusion 26 is in a rectangular ring shape. The first body 2411 and the first protrusion 25 surround to form a second coil portion 242, and the second coil portion 242 is a part of the secondary periphery of the NFC antenna 23.

[0094] Specifically, the second protrusion 26 includes a plurality of first connection segments, which are sequentially connected to one side of the second body 2421. The first protrusion 25 includes a plurality of third connection segments, which are fixedly connected to the first body 2411 and sequentially connected end to end. The plurality of third connection segments are located outside the plurality of first connection segments, and are arranged around the plurality of first connection segments, and are arranged at intervals with the plurality of first connection segments. In this embodiment, there are three first connection segments, namely, the fourth segment 254, the fifth segment 255, and the sixth segment 250. One end of the fourth segment 254 is connected to the second body 2421, and the other end extends along the Y-axis direction; one end of the fifth segment 255 is connected to the second body 2421, and the other end extends along the Y-axis direction. The sixth segment 250 extends along the X-axis direction, and the sixth segment 250 is connected between the fourth segment 254 and the fifth segment 255. There are three third connection segments, namely, the first segment 251, the second segment 252, and the third segment 253. One end of the first section 251 is connected to the first body 2411, and the other end extends along the Y-axis direction; one end of the second section 252 is connected to the first body 2411, and the other end extends along the Y-axis direction. The third section 253 extends along the X-axis direction, and the third section 253 is connected between the first section 251 and the second section 252. The second protrusion 26 is located inside the first protrusion 25, the fourth section 254 is opposite to the first section 251 and is spaced apart, the fifth section 255 is opposite to the second section 252 and is spaced apart, and the sixth section 250 is opposite to the third section 253 and is spaced apart.

[0095] The orthographic projection of the first protrusion 25 on the metal layer 14 partially falls into the second area B of the window 15, and the orthographic projection of the second protrusion 26 on the metal layer 14 partially falls into the second area B of the window 15. Specifically, the orthographic projection of the third segment 253 of the first protrusion 25 falls into the window 15, while the orthographic projections of the first segment 251 and the second segment 252 do not fall into the window 15, the orthographic projection of the sixth segment 250 of the second protrusion 26 falls into the window 15, while the orthographic projections of the fourth segment 254 and the fifth segment 255 do not fall into the window 15.

[0096] In other embodiments, the body may further include a third body (not shown), and the protrusion may further include a third protrusion (not shown). The third protrusion is connected to a straight edge of the third body extending along the X-axis direction, and protrudes in a direction away from the center of the NFC antenna 23, and the third protrusion is located inside the second protrusion 26. The third body and the third protrusion surround the third coil portion, which is a coil surrounded by a circle of conductive wires inside the NFC antenna 23, and the third coil portion is located inside the second coil portion 242. By analogy, the number of coil portions is not specifically limited.

[0097] See also Fig.17 and Fig.18 , Fig.17This is a schematic diagram of the structure of the NFC antenna 23 in the electronic device 100 provided in the seventh embodiment of the present application. Fig.18 This is a partial structural diagram of an electronic device 100 provided in the seventh embodiment of the present application. Fig.18 Only antenna assembly 20 and metal layer 14 in electronic device 100 are shown.

[0098] The difference between this embodiment and the sixth embodiment is that the second protruding portion 26 is in the shape of a rectangular sheet. The second protruding portion 26 includes a first side 256, a second side 257 and a third side 258. The first side 256 and the second side 257 are arranged opposite to each other along the X-axis direction and both extend along the Y-axis direction; the third side 258 extends along the X-axis direction and is connected to the first side 256 and the second side 257. The second protruding portion 26 is located inside the first protruding portion 25, the first side 256 is opposite to the first section 251 and is arranged at intervals, the second side 257 is opposite to the second section 252 and is arranged at intervals, and the third side 258 is opposite to the third section 253 and is arranged at intervals.

[0099] See also Fig.19 , Fig.19 A schematic structural diagram of an electronic device 100 provided in the eighth embodiment of the present application.

[0100] The difference between this embodiment and the first embodiment is that the electronic device 100 is an outward folding mobile phone.

[0101] In the electronic device 100 provided in this embodiment, the electronic device 100 only includes a display assembly 11, which is mounted on one side of the first housing 31, the rotating mechanism, and the second housing 32 in the thickness direction, and the display assembly 11 closes the opening of the accommodating groove 34. The first display screen 13 of the display assembly 11 and the antenna assembly are spaced apart in the thickness direction of the electronic device 100. Specifically, the metal layer faces the NFC antenna. The metal layer is adjacent to the NFC antenna and is spaced apart, and the orthographic projection of the NFC antenna on the metal layer partially exposes the window.

[0102] The first display screen 13 of the display assembly 11 can be unfolded or folded by the first shell 31 and the second shell 32. The first display screen 13 is an external folding screen, that is, when the electronic device 100 is in a folded state, the first display screen 13 constitutes the appearance display surface of the electronic device 100.

[0103] The electronic device 100 shown in the embodiment of the present application is an electronic device 100 that can be folded once. In some other embodiments, the electronic device 100 can also be an electronic device 100 that can be folded multiple times (more than twice). In this case, the electronic device 100 may include multiple parts, two adjacent parts can be folded relatively close to each other until the electronic device 100 is in a folded state, and two adjacent parts can be unfolded relatively far away until the electronic device 100 is in an unfolded state.

[0104] See also Fig. 20 , Fig. 20 A schematic diagram of the structure of an electronic device 100 provided in the ninth embodiment of the present application.

[0105] The difference between this embodiment and the first embodiment is that the electronic device 100 provided in this embodiment is a non-folding straight-bar mobile phone.

[0106] The electronic device 100 only includes a display component 11 and a main body 30. The main body 30 includes a middle frame 35 and a back cover 36. The middle frame is provided with a receiving groove, and the opening of the receiving groove is provided on one side of the middle frame 35 along the thickness direction. The display component 11 is installed on the side of the middle frame 35 away from the receiving groove along the thickness direction. The back cover 36 includes a metal layer 14, which is installed on the side of the main body 30 away from the display component 11 and closes the opening of the receiving groove 34. The metal layer 14 is adjacent to the NFC antenna 23 in the receiving groove 34 and is arranged at intervals, and the orthographic projection of the NFC antenna 23 on the metal layer 14 partially exposes the window 15.

[0107] The metal layer 14 provided in this embodiment has a closed window 15 , which ensures the integrity of the metal layer 14 and avoids setting a gap between the window 15 and the edge of the metal layer 14 , thereby reducing the aesthetics of the metal layer 14 as the back cover of the electronic device 100 .

[0108] The above are only some embodiments and implementation methods of the present application, and the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by any person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An electronic device, characterized in that: The invention comprises a main body, a metal layer and an NFC antenna, wherein the metal layer and the NFC antenna are both installed on the main body, the metal layer is provided with a window, the window penetrates the metal layer along the thickness direction of the metal layer and is spaced apart from the circumference of the metal layer, the NFC antenna is located on the inner side of the metal layer, and is opposite to and spaced apart from the metal layer, the projection of the NFC antenna on the metal layer is located on the inner side of the circumference of the metal layer, and the antenna comprises a main body, and the projection of the main body on the metal layer divides the window into two areas.

2. The electronic device according to claim 1, characterized in that: The NFC antenna includes a protrusion, which is connected to the body and protrudes toward an outer side of the NFC antenna or toward an inner side of the NFC antenna, and a projection of the protrusion on the metal layer at least partially falls into one of the regions.

3. The electronic device according to claim 2, characterized in that: The protrusion includes a plurality of first connecting segments, the plurality of first connecting segments are sequentially connected end to end, and a projection of at least one of the first connecting segments on the metal layer is at least partially located within the window.

4. The electronic device according to claim 3, characterized in that: The protruding portion further includes a second connecting segment, which is located at the inner side of the plurality of first connecting segments and connected between the plurality of first connecting segments.

5. The electronic device according to claim 4, characterized in that: The second connecting segment completely fills the inner sides of the plurality of first connecting segments.

6. The electronic device according to claim 3, characterized in that: The protrusion also includes a plurality of third connecting segments, which are fixedly connected to the body and connected end to end in sequence. The plurality of third connecting segments are located outside the plurality of first connecting segments, are arranged around the plurality of first connecting segments, and are spaced apart from the plurality of first connecting segments.

7. The electronic device according to any one of claims 2 to 6, characterized in that: Along the width direction of the electronic device, the protruding portion includes two side edges arranged opposite to each other, and both ends of the projections of the two side edges on the metal layer are located outside the window.

8. The electronic device according to any one of claims 2 to 6, characterized in that: The electronic device further includes a display component, which is installed on one side of the main body and covers the NFC antenna. The display component includes a display screen and the metal layer, and the metal layer is installed on a surface of the display screen facing the main body.

9. The electronic device according to claim 8, characterized in that: The display screen includes a plurality of source lines, which extend along the length direction of the electronic device and are arranged at intervals along the width direction of the electronic device; and the size of the protrusion in the length direction of the electronic device is less than or equal to 10 mm.

10. The electronic device according to claim 8 or 9, characterized in that: The electronic device is a small foldable mobile phone, and the display screen is a secondary screen of the electronic device.

11. The electronic device according to claim 8 or 9, characterized in that: The electronic device is an outward folding mobile phone, and the display screen is a folding screen of the electronic device.

12. The electronic device according to any one of claims 2 to 6, characterized in that: The electronic device further includes a back cover, which is installed on one side of the main body and covers the NFC antenna, and the back cover includes the metal layer.

13. The electronic device according to any one of claims 1 to 12, characterized in that: The electronic device further includes a shielding plate, which is located on a side of the NFC antenna facing away from the metal layer, and a projection of the shielding plate on the metal layer completely covers the window.

14. The electronic device according to claim 13, characterized in that: The electronic device further includes a main board, which is mounted on the main body and located on a side of the shielding plate away from the NFC antenna.

15. The electronic device according to any one of claims 1 to 12, characterized in that: The electronic device also includes an antenna circuit board, which includes an insulating substrate and the NFC antenna. The NFC antenna is arranged on one side of the insulating substrate, and the NFC antenna is formed by electroplating a metal layer on a surface of the insulating substrate and etching the metal layer.

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