CN216354807U

CN216354807U - NFC antenna and electronic equipment

Info

Publication number: CN216354807U
Application number: CN202121438536.3U
Authority: CN
Inventors: 王文; 储嘉慧
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2022-04-19
Anticipated expiration: 2031-06-25

Abstract

The application provides an NFC antenna and an electronic device. The NFC antenna includes a first coil and a second coil. The second coil comprises an inner coil and an outer coil, the outer coil is positioned on the outer peripheral side of the inner coil and is electrically connected with the inner coil, and the current directions of the inner coil and the outer coil are the same. The two opposite ends of the first coil are respectively and electrically connected with the two opposite ends of the outer coil, and the surface where the first coil is located and the surface where the second coil is located form an included angle. The NFC antenna provided by the application can communicate in two directions, and application scenes of the NFC antenna are increased. Meanwhile, the magnetic field intensity in the direction perpendicular to the surface where the second coil is located is enhanced, so that the communication performance of the NFC antenna in the direction of the surface where the second coil is located is enhanced. The NFC antenna provided by the application solves the technical problems that the existing NFC antenna is single in communication direction and poor in signal strength.

Description

NFC antenna and electronic equipment

Technical Field

The application relates to the technical field of communication, in particular to an NFC antenna and electronic equipment.

Background

Near Field Communication (NFC) is a wireless Communication technology for implementing Near Field Communication between electronic devices by using magnetic Field induction to transmit and receive electromagnetic waves, and the technology may also be referred to as a non-contact identification and interconnection technology. The electronic equipment with the NFC function can replace a bus card, a bank card, an access control card and corresponding card swiping equipment, and can rapidly and safely realize file and data transmission between the equipment. However, the existing NFC antenna generally has a two-dimensional structure, and can only implement a communication function in one direction, which limits the application scenarios of the NFC antenna.

SUMMERY OF THE UTILITY MODEL

The application provides an NFC antenna and electronic equipment can realize two-way communication to solve the single technical problem of current NFC antenna communication direction.

In order to solve the above problem, the present application provides an NFC antenna including a first coil and a second coil. The second coil includes inner coil and outer coil, the outer coil is located the periphery side of inner coil, and with the inner coil electricity is connected, just the inner coil with the electric current direction of outer coil is the same. The two opposite ends of the first coil are respectively and electrically connected with the two opposite ends of the outer coil, and the surface where the first coil is located and the surface where the second coil is located form an included angle.

In this embodiment, the NFC antenna may implement a communication function in the direction of the surface where the first coil is located, and may also implement a communication function in the direction of the surface where the second coil is located, so that the NFC antenna may communicate in both directions, and application scenarios of the NFC antenna are increased. Meanwhile, because the current directions of the inner coil and the outer coil of the second coil are the same, the magnetic field strength in the direction perpendicular to the surface where the second coil is located is enhanced, and the communication performance of the NFC antenna in the direction of the surface where the second coil is located is enhanced.

In one embodiment, the NFC antenna is formed by bending an 8-shaped coil. The NFC antenna may be formed by bending one or more turns of a coil, and the coil constituting the NFC antenna serves as an antenna radiator for transmitting and receiving wireless signals. By setting the NFC antenna to be "8" shaped, the structure of the NFC antenna can be simplified.

In one embodiment, the outer coil includes a first segment, a second segment, a first connection segment and a second connection segment, the first segment and the second segment are electrically connected to two ends of the first coil respectively, and an included angle is formed between a surface where the first segment and the second segment are located and a surface where the first coil is located. The first connecting section is connected with one end of the first section far away from the first coil, the second connecting section is connected with one end of the second section far away from the first coil, and the first connecting section and the second connecting section respectively extend towards the direction close to each other. In this embodiment, the first and second segments are linear and parallel to each other. Because the surface where the first section and the second section are located and the surface where the first coil is located form an included angle, the surface where the first coil is located and the surface where the second coil is located form an included angle, and the function of the NFC antenna bidirectional communication is achieved.

In one embodiment, the inner coil includes a first connection end and a second connection end, the first connection end is located at a side close to the first connection section, the second connection end is located at a side close to the second connection section, the first connection section passes through the second connection section to be connected with the second connection end, and the second connection section passes through the first connection section to be connected with the first connection end. In this embodiment, the first connection segment and the second connection segment extend in a crossing manner and are respectively connected to two ends of the inner coil, so that the current direction of the inner coil is the same as that of the outer coil, and the generated magnetic fields are superposed, thereby enhancing the magnetic field strength of the NFC antenna in the direction perpendicular to the surface where the second coil is located, and further enhancing the communication performance of the NFC antenna in the direction of the second coil.

In one embodiment, the first and second sections are in a first plane and the inner coil is in a second plane, the first plane and the second plane being parallel and spaced apart. The distance between the first plane and the second plane may be appropriately adjusted according to the installation environment, so that the NFC antenna may be suitable for more installation environments.

In one embodiment, a plane where the first coil is located is perpendicular to a plane where the second coil is located, so that the NFC antenna can communicate in two mutually perpendicular directions, and application scenarios of the NFC antenna are increased.

In one embodiment, the NFC antenna further includes a feeding portion, and the feeding portion is electrically connected to the first coil and is configured to feed power to the NFC antenna. In other embodiments, the feeding portion may be provided in the inner coil of the first coil or the second coil or any other position.

The application still provides an electronic equipment, including the casing with the NFC antenna, the casing includes the roof and centers on the peripheral curb plate of roof, the roof with the curb plate is the contained angle and connects, first coil with roof fixed connection, the second coil with curb plate fixed connection. The electronic equipment can realize communication on one side of the top plate and one side of the side plate, and application scenes of the electronic equipment are increased. Meanwhile, the current directions of the inner coil and the outer coil of the second coil are the same, so that the communication performance of the electronic equipment on one side of the side plate is enhanced.

In one embodiment, the top plate and the side plate are both made of metal, an insulating part is arranged on the periphery of the top plate, and the side plate is connected with the insulating part so as to insulate the top plate and the side plate. In the embodiment, the top plate and the side plates are made of metal pieces, so that the metal appearance appeal of the product is met, and the use experience of a user is enhanced.

In one embodiment, the housing has an installation groove at an edge thereof, an opening of the installation groove penetrates through the top plate and the side plate, a first opening is formed in the top plate, a second opening is formed in the side plate, the first coil surrounds the first opening edge and is fixedly connected with the top plate, the outer coil surrounds the second opening edge and is fixedly connected with the side plate, and the inner coil is bent from the second opening into the installation groove. In this embodiment, through set up the mounting groove at the casing edge, and form the opening on the roof with the curb plate, will the NFC antenna along first opening with the second opening is fixed in the mounting groove, the NFC antenna can be adjusted according to the shape of casing to adapt to the installation environment, still plays the effect of practicing thrift the space simultaneously.

In one embodiment, the direction of the induced current on the top plate surface is the same as the direction of the current in the first coil, and the direction of the induced current on the side plate surface is the same as the direction of the current in the second coil. In this embodiment, the top plate and the first coil are coupled to each other to form an induced current in the same direction as the current in the first coil, so that the magnetic field strength in the direction perpendicular to the top plate is enhanced, the side plate and the second coil are coupled to each other to form an induced current in the same direction as the current in the second coil, so that the magnetic field strength in the direction perpendicular to the side plate is enhanced, and the NFC communication performance of the electronic device is enhanced.

In one embodiment, the top plate is a metal sheet or a metal mesh, and the side plates are metal sheets or metal meshes. When the top plate is a metal net, the dustproof function can be achieved.

Synthesize the aforesaid, this application through with first coil with the second coil sets up respectively at two faces that are the contained angle mutually, makes the NFC antenna both can the direction of the face at first coil place can again the direction of the face at second coil place makes the NFC antenna can communicate in the bi-directional, has increased the application scene of NFC antenna. Meanwhile, because the current directions of the inner coil and the outer coil of the second coil are the same, the magnetic field strength in the direction perpendicular to the surface where the second coil is located is enhanced, and the communication performance of the NFC antenna in the direction of the surface where the second coil is located is enhanced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

Fig. 1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

FIG. 2 is an enlarged schematic view of a portion of the electronic device shown in FIG. 1;

FIG. 3 is a schematic view of the direction of current flow in the electronic device of FIG. 2;

FIG. 4 is a schematic diagram of a portion of the electronic device shown in FIG. 1;

FIG. 5 is a magnetic field profile of the electronic device of FIG. 1;

fig. 6 is a schematic diagram of the electronic device shown in fig. 1 communicating with an external electronic device.

Detailed Description

The embodiments of the present application will be described below with reference to the drawings.

Referring to fig. 1 and fig. 2, the present invention provides an electronic device 100, wherein the electronic device 100 is a Bluetooth speaker (Bluetooth speaker). In other embodiments, the electronic device 100 may also be a Smart speaker (Smart speaker), a Wireless router (Wireless router), a television remote control (TV remote control device), a tablet personal computer (tablet personal computer), a laptop computer (laptop computer), a Personal Digital Assistant (PDA), or a wearable device (wearable device). The electronic device 100 includes a housing 20 and an NFC (Near Field Communication) antenna. The NFC antenna 10 is described in detail below.

Referring to fig. 2, the NFC antenna 10 includes a first coil 11 and a second coil 12, the second coil 12 includes an inner coil 13 and an outer coil 14, the outer coil 14 is located on an outer peripheral side of the inner coil 13 and connected to the inner coil 13, and current directions of the inner coil 13 and the outer coil 14 are the same. Opposite ends of the first coil 11 are connected to opposite ends of the outer coil 14, respectively. The surface where the first coil 11 is located is a first surface, the surface where the second coil 12 is located is a second surface, and the first surface and the second surface form an included angle. The second surface may be a plane or two planes parallel to each other.

In this embodiment, the first coil 11 and the second coil 12 are respectively disposed on two surfaces that form an included angle with each other, so that the NFC antenna 10 may be located in the direction of the surface where the first coil 11 is located, that is, the direction of the first surface realizes a communication function, and may be located in the direction of the surface where the second coil 12 is located, that is, the direction of the second surface realizes a communication function, so that the NFC antenna 10 can communicate in both directions, and application scenarios of the NFC antenna 10 are increased. Meanwhile, since the current directions of the inner coil 13 and the outer coil 14 of the second coil 12 are the same, the magnetic field strength in the direction perpendicular to the second surface is enhanced, so that the communication performance of the NFC antenna 10 in the direction of the second surface is enhanced.

The term "communication" in this embodiment refers to a near field communication technique, and data and information are transmitted by an electromagnetic coupling method. The working mode can be as follows: card emulation (CE mode), card reader mode (RW mode), and point-to-point mode (P2P). The operating frequency of the NFC antenna 10 is 13.56 MHz.

Referring to fig. 2, the NFC antenna 10 is formed by bending a multi-turn coil, and the multi-turn coil constituting the NFC antenna 10 is used as an antenna radiator for transmitting and receiving wireless signals. In other embodiments, the NFC coil may also be formed by a one-turn coil. Specifically, NFC coil "8" style of calligraphy coil bending type becomes, simple structure, easily shaping. The first coil 11 is circular arc-shaped. The two opposite ends of the first coil 11 are a first end 111 and a second end 112, respectively, and the first end 111 and the second end 112 are spaced apart from each other. In this embodiment, the first coil 11 is a major arc, in other embodiments, the first coil 11 may also be a semi-circular arc or a minor arc, and the first coil 11 may also be a square ring or other shapes.

The outer coil 14 of the second coil 12 includes a first segment 15, a second segment 16, a first connection segment 17 and a second connection segment 18, and the first segment 15 and the second segment 16 are linear and parallel to each other. The term "parallel" as used herein may be perfectly parallel or may allow for minor deviations. The first section 15 is connected with a first end 111 of the first coil 11, the second section 16 is connected with a second end 112 of the first coil 11, and a first included angle a is formed between the plane where the first section 15 and the second section 16 are located and the plane where the first coil 11 is located. In this embodiment, the first included angle a is a right angle. In other embodiments, the first included angle a may be an acute angle or an obtuse angle. The first connecting section 17 connects one end of the first section 15 away from the first coil 11, the second connecting section 18 connects one end of the second section 16 away from the first coil 11, and the first connecting section 17 and the second connecting section 18 extend toward directions approaching each other, respectively.

The inner coil 13 of the second coil 12 is annular, and in this embodiment, the inner coil 13 is square. In other embodiments, the first coil 11 may be a circular ring or a ring with other shapes. The "ring" referred to herein is a non-closed ring. The inner coil 13 includes a first connection end 131 and a second connection end 132, the first connection end 131 is located at a side close to the first connection segment 17, and the second connection end 132 is located at a side close to the second connection segment 18. The first connecting section 17 passes through the second connecting section 18 to connect with the second connecting end 132, and the second connecting section 18 passes through the first connecting section 17 to connect with the first connecting end 131. That is, the first connection segment 17 and the second connection segment 18 extend in a crossing manner, the first connection segment 17 is connected to the second connection end 132 of the inner coil 13, and the second connection segment 18 is connected to the first connection end 131.

In one embodiment, the second face includes a first plane and a second plane. The first plane is a plane where the first section 15 and the second section 16 are located, the second plane is a plane where the inner coil 13 is located, and the first plane and the second plane are parallel and have a gap. Of course, the first plane and the second plane may not be completely parallel, allowing for a small amount of deviation. The first connecting segment 17 and the second connecting segment 18 connect between the first plane and the second plane. In other embodiments, the first plane and the second plane may also overlap, i.e. the inner coil 13 and the outer coil 14 are in the same plane.

The inner coil 13 with the position and the structure of outer coil 14 can be based on adaptability adjustment is done to the environment that NFC antenna 10 installed, so that NFC antenna 10 can be applicable to more installation environment, as long as the face at first coil 11 place with be the contained angle between the face at second coil 12 place can, that is, first face with be the contained angle between the second face can.

With reference to fig. 2 and fig. 3, the NFC antenna 10 further includes a feeding portion 50, and the feeding portion 50 is located in the second coil 12. In this embodiment, the power feeding unit 50 is provided on the second connection line segment 18 of the outer coil 14. The feeding portion 50 is used for feeding current to the second coil 12 and the first coil 11. In other embodiments, the feeding portion 50 may be provided at the inner coil 13 of the first coil 11 or the second coil 12 or at any other position.

The current direction of the NFC antenna 10 is as follows: the current is fed into the second connecting line segment 18 from the feeding portion 50, flows from the second connecting line segment 18 to the first coil 11 through the second end 112, flows from the first coil 11 to the first segment 15, flows from the first segment 15 to the first connecting line segment 17, flows from the first connecting line segment 17 to the inner coil 13 through the second connecting end 132, flows from the inner coil 13 to the second connecting line segment 18 through the first connecting end 131, and flows to the feeding portion 50, so as to form a current loop.

In this embodiment, the current flowing through the first coil 11 generates a magnetic field in a direction perpendicular to the first surface, so that the NFC antenna 10 can communicate in the direction of the first surface, and the current flowing through the inner coil 13 and the outer coil 14 generates a magnetic field in a direction perpendicular to the second surface, so that the NFC antenna 10 can communicate in the direction of the second surface, thereby implementing the performance of bidirectional communication of the NFC antenna 10 and increasing the application scenarios of the NFC antenna 10.

Moreover, the directions of the currents flowing through the inner coil 13 and the outer coil 14 are the same, both the current flowing through the inner coil 13 and the current flowing through the outer coil 14 generate magnetic fields in the direction perpendicular to the second plane, and the directions of the magnetic fields generated by the inner coil 13 and the outer coil 14 are the same, so that the magnetic field strength of the NFC antenna 10 in the direction perpendicular to the second plane can be enhanced, and further, the communication performance of the NFC antenna 10 in the direction from the second plane is enhanced.

Referring to fig. 4, the NFC antenna 10 is mounted in the housing 20. Specifically, casing 20 is the cylinder, including roof 21, bottom plate 22 and curb plate 23, curb plate 23 centers on roof 21 periphery, with curb plate 23 is the contained angle and connects, just curb plate 23 connects roof 21 with between the bottom plate 22. In this embodiment, the side plate 23 is vertically connected to the top plate 21 and the bottom plate 22. In other embodiments, the included angle between the surface of the side plate 23 and the surface of the top plate 21 may be an acute angle or an obtuse angle. The housing 20 may also be a rectangular parallelepiped or any other shape. The housing 20 may also house other components of the electronic device 100.

Referring to fig. 4, an installation groove 24 is formed on an edge of the housing 20, an opening of the installation groove 24 penetrates through the top plate 21 and the side plate 23, a first opening 241 is formed on the top plate 21, and a second opening 242 is formed on the side plate 23. The mounting groove 24 includes a side wall (not shown) connected to a periphery of the first opening 241 and vertically connected to the top plate 21.

Referring to fig. 2 to 4, the first coil 11 is fixed on the inner surface of the top plate 21 around the periphery of the first opening 241, and the first end 111 and the second end 112 are located at the edge of the top plate 21. The first section 15 is connected to the first end 111, and the second section 16 is connected to the second end 112 and fixed to the inner surface of the side plate 23 along the periphery of the second opening 242. The first connection segment 17 and the second connection segment 18 are bent from the second opening 242 toward the mounting groove 24 until the inner coil 13 is fixed on the side wall, and the surface where the inner coil 13 is located is parallel to the surfaces where the first segment 15 and the second coil 12 are located.

The first coil 11 and the top plate 21 may be fixed by bonding, or may be connected by clamping or welding. The fixing mode of the second coil 12 and the side plate 23 may be bonding, or may be a connection mode such as clamping or welding. As long as the NFC antenna 10 can be fixed in the housing 20.

In one embodiment, the top plate 21, the side plate 23, and the bottom plate 22 are all made of plastic, so that the weight of the electronic device 100 can be reduced, and the communication performance of the NFC antenna 10 is not affected. When the top plate 21, the side plate 23, and the bottom plate 22 are all plastic members, no opening needs to be formed in the top plate 21 and the side plate 23, and the NFC antenna 10 may be fixed in the housing 20.

In one embodiment, the top plate 21 and the side plate 23 may be both made of metal. In this embodiment, an insulating portion 25 is disposed on a periphery of the top plate 21, and the side plate 23 is connected to the insulating portion 25 to insulate the top plate 21 and the side plate 23. That is, the insulating portion 25 is provided at the connection of the side plate 23 and the top plate 21 so that the side plate 23 and the top plate 21 are insulated from each other without electrical contact.

When a current is fed from the feeding portion 50, the current flowing through the first coil 11 generates a directional magnetic field perpendicular to the first surface around the first coil 11. Meanwhile, the current flowing through the first coil 11 causes the surface of the top plate 21 to form a first induced current 31, the first induced current 31 is an eddy current around the outer circumference of the first coil 11, and the direction of the first induced current 31 is the same as the current direction of the first coil 11. The direction of the magnetic field generated by the first induced current 31 is the same as the direction of the magnetic field generated by the current in the first coil 11, and the magnetic field generated by the first induced current 31 is superimposed with the magnetic field generated by the current in the first coil 11, so that the strength of the magnetic field in the direction perpendicular to the first surface is increased, and the communication performance of the NFC antenna 10 in the direction of the first surface is further enhanced.

Referring to fig. 5 and fig. 6, the electronic device 100 generates a magnetic field in the first plane direction. When the external electronic device 200 is located in the direction of the first surface, the external electronic device 200 performs information and data transmission with the first coil 11 and the top plate 21 by electromagnetic coupling, thereby realizing a communication function. Specifically, when the vertical distance from the external electronic device 200 to the first surface is within 25cm, the communication between the external electronic device 200 and the electronic device 100 can be realized. Meanwhile, since the magnetic field generated by the first induced current 31 on the top plate 21 can increase the magnetic field strength in the direction perpendicular to the first surface, the first coil 11 with a smaller area can be used in this embodiment to achieve the same communication performance, thereby saving space and raw materials.

Referring to fig. 2 and 3, the current flowing through the second coil 12 generates a magnetic field in a direction perpendicular to the second surface around the second coil 12. The current flowing through the first segment 15 and the second segment 16 of the second coil 12 causes the surface of the side plate 23 to generate a second induced current 32, the second induced current 32 is a socket current flowing around the outer circumference of the second coil 12, and the direction of the second induced current 32 is the same as the direction of the current in the second coil 12. Meanwhile, the direction of the magnetic field generated by the second inductive current 32 is the same as the direction of the magnetic field generated by the current in the second coil 12, and the magnetic field generated by the second inductive current 32 is superimposed with the magnetic field generated by the current in the second coil 12, so that the strength of the magnetic field in the direction perpendicular to the second plane is increased, and the communication performance of the NFC antenna 10 in the direction of the second plane is further enhanced.

Referring to fig. 5 and fig. 6, the electronic device 100 is further capable of generating a magnetic field in the direction of the second surface. When the external electronic device 200 is located in the direction of the second surface, the external electronic device 200, the second coil 12 and the side plate 23 transmit information and data by electromagnetic coupling, thereby implementing a communication function. Specifically, when the vertical distance from the external electronic device 200 to the second surface is within 15cm, the communication between the external electronic device 200 and the electronic device 100 can be realized. Meanwhile, the magnetic field generated by the second induced current 32 on the side plate 23 can increase the magnetic field strength in the direction perpendicular to the second surface, so that in order to achieve the communication performance with the same effect, the second coil 12 with a smaller area can be adopted in the embodiment, and the effects of saving space and raw materials are achieved.

In this embodiment, the top plate 21 and the side plate 23 of the electronic device 100 are made of metal materials, so that the metal appearance requirements of products are met, and the use experience of users is enhanced. Meanwhile, the top plate 21 as a metal part and the first coil 11 are coupled with each other to form an induced current in the same direction as the current in the first coil 11, so that the magnetic field strength in the direction perpendicular to the first surface is enhanced, the side plate 23 as a metal part and the second coil 12 are coupled with each other to form an induced current in the same direction as the current in the second coil 12, so that the magnetic field strength in the direction perpendicular to the second surface is enhanced, and the NFC communication performance of the electronic device 100 is enhanced.

Referring to fig. 4, the metal member may be a metal sheet or a metal mesh. In this embodiment, the top plate 21 is a dustproof metal mesh, which plays a role of dust prevention, and at the same time, induced current can be generated under the excitation of the current in the first coil 11, so as to enhance the magnetic field strength in the direction perpendicular to the first surface. The metal mesh herein has a high mesh density and may be equivalent to a metal sheet.

Referring to fig. 1 and 4, in one embodiment, an adjusting member 40 is disposed in the mounting groove 24. The adjusting member 40 may be a volume adjusting knob, a frequency adjusting knob or a power knob. In this embodiment, the adjusting member 40 is a volume adjusting knob, and is used for adjusting the volume of the electronic device 100. By installing the adjusting member 40 and the NFC antenna 10 adjusting member 40 in the installation groove 24 at the same time, space saving can be achieved.

The above embodiments and embodiments of the present application are only examples and embodiments, and the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and all the changes or substitutions should be covered within the 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 NFC antenna is applied to an electronic device and is characterized by comprising: first coil and second coil, the second coil includes interior coil and outer coil, the outer coil is located the periphery side of inner coil, and with the inner coil electricity is connected, just the inner coil with the current direction of outer coil is the same, the relative both ends of first coil respectively with the relative both ends electricity of outer coil is connected, the face at first coil place with personally submit the contained angle at second coil place.

2. The NFC antenna of claim 1, wherein the NFC antenna is formed by bending an 8-shaped coil.

3. The NFC antenna according to claim 2, wherein the outer coil comprises a first section, a second section, a first connecting section and a second connecting section, the first section and the second section are respectively electrically connected with two ends of the first coil, and an included angle is formed between the surface where the first section and the second section are located and the surface where the first coil is located; the first connecting section is connected with one end of the first section far away from the first coil, the second connecting section is connected with one end of the second section far away from the first coil, and the first connecting section and the second connecting section respectively extend towards the direction close to each other.

4. The NFC antenna of claim 3, wherein the inner coil includes a first connection end and a second connection end, the first connection end is located on a side adjacent to the first connection section, the second connection end is located on a side adjacent to the second connection section, the first connection section is connected to the second connection end through the second connection section, and the second connection section is connected to the first connection end through the first connection section.

5. The NFC antenna of claim 4, wherein the first segment and the second segment are in a first plane and the inner coil is in a second plane, the first plane and the second plane being parallel and spaced apart.

6. An NFC antenna according to any one of claims 1 to 5, characterised in that the face on which the first coil is located and the face on which the second coil is located are perpendicular.

7. The NFC antenna of claim 1, further comprising a feed electrically connected with the first coil for feeding the NFC antenna.

8. An electronic device, comprising a housing and the NFC antenna of any of claims 1-7, wherein the housing comprises a top plate and a side plate surrounding a periphery of the top plate, the top plate is connected to the side plate at an included angle, the first coil is fixedly connected to the top plate, and the second coil is fixedly connected to the side plate.

9. The electronic device of claim 8, wherein the top plate and the side plate are both made of metal, an insulating part is disposed on a periphery of the top plate, and the side plate is connected to the insulating part to insulate the top plate and the side plate.

10. The electronic device of claim 9, wherein the housing has an installation slot, an opening of the installation slot penetrates through the top plate and the side plate, a first opening is formed in the top plate, a second opening is formed in the side plate, the first coil surrounds the first opening edge and is fixedly connected to the top plate, the outer coil surrounds the second opening edge and is fixedly connected to the side plate, and the inner coil is bent from the second opening into the installation slot.

11. The electronic apparatus according to claim 9 or 10, wherein a direction of an induced current in a surface of the top plate is the same as a direction of a current in the first coil, and a direction of an induced current in a surface of the side plate is the same as a direction of a current in the second coil.

12. The electronic device of claim 11, wherein the top plate is a metal sheet or a metal mesh, and the side plate is a metal sheet or a metal mesh.