Antenna device and electronic equipment

Abstract

The embodiment of the present application provides an antenna device and an electronic device, including: a near field communication chip for providing a differential excitation current; a near field communication coil for being arranged at the periphery of a camera module, the near field communication coil being electrically connected to the near field communication chip; a first conductor structure being electrically connected to the near field communication coil, and the first conductor structure being grounded; a second conductor structure being electrically connected to the near field communication chip, and the second conductor structure being grounded; wherein the near field communication coil, the first conductor structure, and the second conductor structure are used to transmit the differential excitation current together, and when transmitting the differential excitation current, the near field communication coil forms a first near field communication radiation field, the first conductor structure forms a second near field communication radiation field, and the second conductor structure forms a third near field communication radiation field, and the first near field communication radiation field is used to enhance the second near field communication radiation field and the third near field communication radiation field. The performance of the near field communication antenna can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna device and an electronic device. Background Art

[0002] With the development of communication technology, electronic devices such as smart phones can realize more and more functions, and the communication modes of electronic devices are also more diversified. For example, common electronic devices can support multiple communication modes such as cellular network communication, wireless fidelity (Wireless Fidelity, Wi-Fi) communication, global positioning system (Global Positioning System, GPS) communication, Bluetooth (Bluetooth, BT) communication, etc. In addition, with the advancement of communication technology, electronic devices can gradually realize near field communication (Near Field Communication, NFC) recently. It can be understood that each communication mode of electronic devices requires corresponding antennas to support.

[0003] On the other hand, although using the metal frame as the NFC antenna can increase the radiation area of ​​the antenna, the radiation field strength of the NFC antenna is limited. Summary of the invention

[0004] The embodiments of the present application provide an antenna device and an electronic device, which can enhance the radiation field strength of an NFC antenna and improve the performance of the NFC antenna.

[0005] In a first aspect, an embodiment of the present application provides an antenna device, including:

[0006] A near field communication chip for providing a differential excitation current;

[0007] A near field communication coil, used to be arranged at the periphery of the camera module, the near field communication coil being electrically connected to the near field communication chip;

[0008] A first conductor structure, electrically connected to the near field communication coil, and the first conductor structure is grounded;

[0009] A second conductor structure is electrically connected to the near field communication chip, and the second conductor structure is grounded;

[0010] Among them, the near-field communication coil, the first conductor structure, and the second conductor structure are used to jointly transmit the differential excitation current. When transmitting the differential excitation current, the near-field communication coil forms a first near-field communication radiation field, the first conductor structure forms a second near-field communication radiation field, and the second conductor structure forms a third near-field communication radiation field. The first near-field communication radiation field is used to enhance the second near-field communication radiation field and the third near-field communication radiation field.

[0011] In a second aspect, an embodiment of the present application further provides an electronic device, comprising an antenna device, wherein the antenna device is the above-mentioned antenna device.

[0012] The antenna device and electronic device provided in the embodiments of the present application connect the first conductor structure and the second conductor structure through a near-field communication chip. Then, a near-field communication coil is arranged at the periphery of the camera module. The first conductor structure is electrically connected to the near-field communication chip through the near-field communication coil. The near-field communication coil is used to transmit the differential excitation current provided by the near-field communication chip to form a first near-field communication radiation field. The first conductor structure and the second conductor structure are both used to transmit the differential excitation current provided by the near-field communication chip to respectively form a second near-field communication radiation field and a third near-field communication radiation field. The third near-field communication radiation field generated by the near-field communication coil can be used to enhance the first near-field communication radiation field and the second near-field communication radiation field, thereby improving the performance of the near-field communication antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0014] Figure 1 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.

[0015] Figure 2 for Figure 1 A rear view of the electronic device is shown.

[0016] Figure 3 A schematic diagram of a first connection structure between an antenna device and a camera module in an electronic device provided in an embodiment of the present application.

[0017] Figure 4 A schematic diagram of the first structure of a back cover in an electronic device provided in an embodiment of the present application.

[0018] Figure 5 A second structural schematic diagram of a back cover in an electronic device provided in an embodiment of the present application.

[0019] Figure 6 A third structural schematic diagram of the back cover of the electronic device provided in an embodiment of the present application.

[0020] Figure 7 A fourth structural schematic diagram of the back cover of the electronic device provided in an embodiment of the present application.

[0021] Figure 8A schematic diagram of the structure of a middle frame of an electronic device provided in an embodiment of the present application.

[0022] Fig. 9 A schematic diagram of a first connection structure between a camera module and a near field communication coil in an electronic device provided in an embodiment of the present application.

[0023] Fig.10 A schematic diagram of a second connection structure between a camera module and a near-field communication coil in an electronic device provided in an embodiment of the present application.

[0024] Fig.11 A schematic diagram of a second connection structure between an antenna device and a camera module in an electronic device provided in an embodiment of the present application.

[0025] Fig.12 A schematic diagram of a third connection structure between an antenna device and a camera module in an electronic device provided in an embodiment of the present application.

[0026] Fig.13 A schematic diagram of a fourth connection structure between an antenna device and a camera module in an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0028] The present application provides an electronic device, which may be a smartphone, a tablet computer, or a gaming device, an AR (Augmented Reality) device, an automotive device, a data storage device, an audio player, a video player, a laptop, a desktop computing device, etc.

[0029] refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of an electronic device 100 provided in an embodiment of the present application. Figure 2 for Figure 1 A rear view of electronic device 100 is shown.

[0030] The electronic device 100 includes a display screen 10 , a middle frame 20 , a circuit board 30 , a battery 40 , a back cover 50 and a camera module 60 .

[0031] The display screen 10 is disposed on the middle frame 20 to form a display surface of the electronic device 100 for displaying information such as images and texts. The display screen 10 may include a liquid crystal display (LCD) or an organic light-emitting diode display (OLED).

[0032] It is understandable that the display screen 10 can be a full screen, in which case the entire area of ​​the display screen 10 is a display area and does not include a non-display area, or the non-display area on the display screen 10 only occupies a smaller area for the user, so that the display screen 10 has a larger screen-to-body ratio. Alternatively, the display screen 10 can also be a non-full screen, in which case the display screen 10 includes a display area and a non-display area adjacent to the display area. The display area is used to display information, and the non-display area does not display information.

[0033] It is understandable that a cover plate may be provided on the display screen 10 to protect the display screen 10 from being scratched or damaged by water. The cover plate may be a transparent glass cover plate, so that the user can observe the content displayed on the display screen 10 through the cover plate. It is understandable that the cover plate may be a sapphire glass cover plate.

[0034] The middle frame 20 may be a thin plate or sheet structure, or a hollow frame structure. The middle frame 20 is used to provide support for the electronic devices or functional components in the electronic device 100, so as to install the electronic devices and functional components of the electronic device 100 together. For example, the middle frame 20 may be provided with structures such as grooves, protrusions, and through holes to facilitate the installation of the electronic devices or functional components of the electronic device 100. It is understandable that the material of the middle frame 20 may include metal or plastic.

[0035] The circuit board 30 is arranged on the middle frame 20 for fixing, and the circuit board 30 is sealed inside the electronic device 100 by the back cover 50. The circuit board 30 may be a mainboard of the electronic device 100. A processor may be integrated on the circuit board 30, and one or more functional components such as an earphone interface, an acceleration sensor, a gyroscope, and a motor may also be integrated. At the same time, the display screen 10 may be electrically connected to the circuit board 30 so that the display of the display screen 10 is controlled by the processor on the circuit board 30.

[0036] The battery 40 is disposed on the middle frame 20, and the battery 40 is sealed inside the electronic device 100 through the back cover 50. At the same time, the battery 40 is electrically connected to the circuit board 30 so that the battery 40 can power the electronic device 100. A power management circuit may be disposed on the circuit board 30. The power management circuit is used to distribute the voltage provided by the battery 40 to various electronic devices in the electronic device 100.

[0037] The back cover 50 is connected to the middle frame 20. For example, the back cover 50 can be attached to the middle frame 20 by an adhesive such as a double-sided tape to achieve connection with the middle frame 20. The back cover 50 is used to seal the electronic devices and functional components of the electronic device 100 inside the electronic device 100 together with the middle frame 20 and the display screen 10 to protect the electronic devices and functional components of the electronic device 100. It can be understood that the back cover 50 can be integrally formed. During the molding process of the back cover 50, an opening can be formed on the back cover 50, and the opening is used to install structures such as a rear camera. The material of the back cover 50 includes metals, such as copper, aluminum, silver, etc.

[0038] The camera module 60 is disposed on the middle frame 20. For example, the camera module 60 can be mounted on the middle frame 20 for fixing. At the same time, the camera module 60 is electrically connected to the circuit board 30 so that the camera module 60 can be controlled by the processor on the circuit board 30, for example, to control the camera module 60 to take pictures or record videos.

[0039] It is understandable that the camera module 60 may be a rear camera module of the electronic device 100. At this time, an opening for installing the camera module 60 may be provided on the back cover, the camera module 60 is installed on the middle frame 20 through the opening, and the camera module 60 may also collect ambient light signals for imaging through the opening.

[0040] See also Figure 3 , Figure 3 A schematic diagram of the first connection structure between the antenna device and the camera module in the electronic device provided in the embodiment of the present application; the antenna device 200 may also be provided in the electronic device 100. The antenna device 200 is used to implement the wireless communication function of the electronic device 100. For example, the antenna device 200 may be used to implement near field communication (NFC communication). The antenna device 200 is arranged inside the electronic device 100. Among them, it can be understood that some components of the antenna device 200 can be integrated on the circuit board 30 inside the middle frame 20, for example, the signal processing chip and the signal processing circuit in the antenna device 200 can be integrated on the circuit board 30. In addition, some components of the antenna device 200 can also be directly provided on the middle frame 20. For example, the radiator or conductor structure of the antenna device 200 for radiating signals can be directly provided on the middle frame 20.

[0041] The antenna device 200 includes a near field communication chip 21 , a near field communication coil 22 , a first conductor structure 23 , a second conductor structure 24 and a ground plane 25 .

[0042] In the description of this application, it should be understood that terms such as "first" and "second" are only used to distinguish similar objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0043] Among them, the near field communication chip (NFCIC) 21 can be used to provide a near field communication signal, that is, NFCIC21 is used to provide a differential excitation current. The differential excitation current includes two current signals. The two current signals have the same amplitude and opposite phases, or it is understood that the two current signals differ in phase by 180 degrees. In addition, the differential excitation current is a balanced signal. It can be understood that if the analog signal is directly transmitted during the transmission process, it is an unbalanced signal; if the original analog signal is inverted, and then the inverted analog signal and the original analog signal are transmitted at the same time, the inverted analog signal and the original analog signal are called balanced signals. During the transmission process, the balanced signal passes through a differential amplifier, and the original analog signal and the inverted analog signal are subtracted to obtain an enhanced original analog signal. Since the two transmission lines are subject to the same interference during the transmission process, the same interference signal is subtracted during the subtraction process, so the balanced signal has better anti-interference performance.

[0044] The NFC IC 21 includes a first differential signal terminal 211 and a second differential signal terminal 212. For example, the first differential signal terminal 211 may be a positive (+) port of the NFC IC 21, and the second differential signal terminal 212 may be a negative (-) port of the NFC IC 21. The first differential signal terminal 211 and the second differential signal terminal 212 are used to provide the differential excitation current. For example, the differential excitation current provided by the NFC IC 21 may be output to the antenna device 200 via the first differential signal terminal 211, and flow back to the NFC IC 21 via the second differential signal terminal 212, thereby forming a conductive loop.

[0045] It is understandable that the NFC IC 21 can be disposed on the circuit board 30 of the electronic device 100, or a smaller independent circuit board can be disposed in the electronic device 100 and the NFC IC 21 can be integrated into the independent circuit board. The independent circuit board can be, for example, a small board in the electronic device 100.

[0046] The near field communication coil 22 is used to be arranged around the camera module 60. The near field communication coil 22 is electrically connected to the NFC IC 21. The near field communication coil 22 is used to transmit the differential excitation current provided by the NFC IC 21 to form a first near field communication radiation field.

[0047] The first conductor structure 23 is electrically connected to the near field communication coil 22 and is grounded. The first conductor structure 23 is used to transmit the differential excitation current provided by the NFCIC 21 to form a second near field communication radiation field.

[0048] The first conductor structure 23 may be a metal structure in the electronic device 100 , a metal trace on the circuit board 30 , a winding coil or other structures.

[0049] The second conductor structure 24 is electrically connected to the NFC IC 21 and is grounded. The second conductor structure 24 is used to transmit the differential excitation current provided by the NFC IC 21 to form a third near field communication radiation field.

[0050] The second conductor structure 24 may be a metal structure in the electronic device 100 , a metal trace on the circuit board 30 , a winding coil or other structures.

[0051] In the embodiment of the present application, the near field communication coil 22 is arranged around the camera module, the first conductor structure 23 is electrically connected to the NFC IC 21 through the near field communication coil 22, and the first near field communication radiation field formed by the near field communication coil 22 is used to enhance the second near field communication radiation field formed by the first conductor structure 23 and the third near field communication radiation field formed by the second conductor structure 24, thereby improving the NFC antenna performance.

[0052] It can be understood that the first near field communication radiation field, the second near field communication radiation field and the third near field communication radiation field at least partially overlap, so that the first near field communication radiation field, the second near field communication radiation field and the third near field communication radiation field can enhance each other, thereby improving the performance of the NFC antenna.

[0053] Among them, since the first near-field communication radiation field, the second near-field communication radiation field and the third near-field communication radiation field at least partially overlap, the direction of the differential excitation current in the near-field communication coil 22 can be the same as the direction of the differential excitation current in the first conductor structure 23 or have a certain angle, and the direction of the differential excitation current in the near-field communication coil 22 can be the same as the direction of the differential excitation current in the second conductor structure 24 or have a certain angle, and the angle is less than 90 degrees.

[0054] It can be understood that the first conductor structure 23 can also be directly electrically connected to the NFC IC 21, and the near field communication coil 22 can also be located between the second conductor structure 24 and the NFC IC 21, and the second conductor structure 24 is electrically connected to the NFC IC 21 through the near field communication coil 22.

[0055] It can be understood that the first conductor structure 23, the second conductor structure 24 and the near field communication coil 22 can also be electrically connected to the NFC IC 21 respectively. When the first conductor structure 23, the second conductor structure 24 and the near field communication coil 22 are electrically connected to the NFCIC 21 respectively, the first conductor structure 23, the second conductor structure 24 and the near field communication coil 22 are grounded respectively.

[0056] The ground plane 25 is used to form a common ground. The ground plane 25 can be formed by a conductor, a printed circuit, or a metal printed layer in the electronic device 100. For example, the ground plane 25 can be set on the circuit board 30 of the electronic device 100. The ground plane 25 can also be formed on the middle frame 20 of the electronic device 100, or the ground plane 25 can also be formed by a metal back cover 50.

[0057] The ground plane 25 includes a first ground point 251 and a second ground point 252 which are arranged at intervals. The first ground point 251 and the second ground point 252 may be, for example, ends of the ground plane 25, or protruding structures on the ground plane 25, or pads formed on the ground plane 25.

[0058] The ground plane 25 forms a conductive path between the first ground point 251 and the second ground point 252, and the conductive path can be used to conduct current. That is, when a voltage signal is applied between the first ground point 251 and the second ground point 252, a current can be generated between the first ground point 251 and the second ground point 252, thereby forming a current loop. It can be understood that when the NFC IC 21 provides a differential excitation current, the conductive path between the first ground point 251 and the second ground point 252 can be used to transmit the differential excitation current.

[0059] The first conductor structure 23 includes a first feeding terminal 231 and a first grounding terminal 232 which are arranged at intervals. The first feeding terminal 231 is electrically connected to the first end of the near field communication coil 22, and the second end of the near field communication coil 22 is electrically connected to the first differential signal terminal 211 of the NFC IC 21, so that the first differential signal terminal 211 feeds the near field communication coil 22 and the first feeding terminal 231 of the first conductor structure 23 respectively. For example, the differential excitation current provided by the NFC IC 21 can be transmitted to the near field communication coil 22 and the first feeding terminal 231 of the first conductor structure 23 via the first differential signal terminal 211, so as to feed the near field communication coil 22 and the first conductor structure 23. The first grounding terminal 232 is electrically connected to the first grounding point 251 of the ground plane 25, so as to realize the ground return of the first conductor structure 23 and the near field communication coil 22.

[0060] The second conductor structure 24 includes a second feeding terminal 241 and a second grounding terminal 242 that are spaced apart. The second feeding terminal 241 is electrically connected to the second differential signal terminal 212 of the NFC IC 21, so that the second differential signal terminal 212 feeds the second feeding terminal 241. For example, the differential excitation current provided by the NFC IC 21 can be transmitted to the second differential signal terminal 212 via the second feeding terminal 241 to feed the second conductor structure 24. The second grounding terminal 242 is electrically connected to the second grounding point 252 of the ground plane 25, so as to realize the ground return of the second conductor structure 24.

[0061] The near field communication coil 22, the first conductor structure 23, the conductive path on the ground plane 25, and the second conductor structure 24 together form a conductive loop for the differential excitation current to be transmitted. That is, the differential excitation current is output from a signal terminal of the NFCIC 21, for example, from the first differential signal terminal 211, and then fed into the near field communication coil 22, transmitted to the first conductor structure 23 via the near field communication coil 22, transmitted to the conductive path on the ground plane 25 via the first conductor structure 23, and then transmitted to the second conductor structure 24 via the conductive path, and finally flows back to the second differential signal terminal 212 of the NFC IC 21 through the second conductor structure 24, thereby forming a complete conductive loop.

[0062] It can be understood that when the conductive loop transmits the differential excitation current, the near field communication coil 22, the first conductor structure 23, the conductive path on the ground plane 25, and the second conductor structure 24 can jointly generate an alternating electromagnetic field, thereby radiating an NFC signal outward to achieve NFC communication of the electronic device 100.

[0063] like Figure 3As shown, when the first differential signal terminal 211 of the NFC IC 21 is set to the positive pole (+) and the second differential signal terminal 212 is set to the negative pole (-), when the conductive loop transmits the differential excitation current, the current is transmitted from the first differential signal terminal 211 of the NFC IC 21 to the first end of the near field communication coil 22, and then, the differential excitation current is transmitted in the near field communication coil 22 in a counterclockwise direction, and is transmitted from the second end of the near field communication coil 22 to the first conductor structure 23, and then transmitted from the first conductor structure 23 to the ground plane 25, and then transmitted to the second conductor structure 24 through the conductive path on the ground plane 25, and then transmitted from the second conductor structure 24 to the second differential signal terminal 212 of the NFC IC 21.

[0064] When the first differential signal terminal 211 of the NFC IC 21 is set to the negative pole (-) and the second differential signal terminal 212 is set to the positive pole (+), when the conductive loop transmits the differential excitation current, the current is transmitted from the second differential signal terminal 212 of the NFC IC 21 to the second conductor structure 24, and then from the second conductor structure 24 to the ground plane 25, and then transmitted to the first conductor structure 23 through the conductive path on the ground plane 25, and then transmitted from the first conductor structure 23 to the first end of the near field communication coil 22. The differential excitation current is transmitted in the near field communication coil 22 in a clockwise direction, and is transmitted from the second end of the near field communication coil 22 to the first differential signal terminal 211 of the NFC IC 21.

[0065] The first conductor structure 23 and the second conductor structure 24 may be metal structures in the electronic device 100 , metal traces on the circuit board 30 , winding coils and other structures.

[0066] For example, a printed circuit is provided on the circuit board 30 of the electronic device 100. The first conductor structure 23 may be the printed circuit, or the second conductor structure 24 may be the printed circuit.

[0067] For another example, the electronic device 100 includes a flexible printed circuit (FPC), and the FPC is electrically connected to the circuit board 30. The FPC may be, for example, a display screen FPC, a camera FPC, a motor FPC, or the like, or the FPC may be an independent FPC for implementing an NFC conductor structure, which may be fixed in the housing of the electronic device 100. The FPC is provided with a metal trace, which is used to transmit a signal, for example, a control signal of a display screen, a control signal of a camera, a control signal of a motor, etc. The first conductor structure 23 may include the metal trace, or the second conductor structure 24 may include the metal trace.

[0068] For another example, a first metal branch and a second metal branch are arranged on the metal back cover 50 at intervals. The first metal branch forms the first conductor structure 23 , and the second metal branch forms the second conductor structure 24 .

[0069] Please continue reading Figure 3 Also see Figure 4 , Figure 4 A first structural schematic diagram of a back cover in an electronic device provided in an embodiment of the present application; when the first metal branch and the second metal branch are located on two opposite sides of the back cover 50, the two sides are respectively a left side and a right side, and a first gap 51 and a second gap 52 are provided on the back cover 50 at intervals, and the first gap 51 and the second gap 52 are both provided through the back cover 50, and the first gap 51 extends on the back cover 50 toward a first direction to form a first metal branch, and the second gap 52 extends on the back cover 50 toward a second direction to form a second metal branch, wherein the first direction and the second direction may be the same or different.

[0070] Specifically, a first break 53 and a second break 54 are also provided on the back cover 50. The first break 53 and the second break 54 are arranged through the back cover 50, and the first break 53 is interconnected with the first gap 51 to form a first metal branch, and the second break 54 is interconnected with the second gap 52 to form a second metal branch.

[0071] An opening 55 is also provided on the back cover 50, and the opening 55 is used to install the camera module 60, wherein the opening 55 can be set at a position close to the edge of the back cover 50, or the opening 55 can be set in the middle position of the back cover 50. The setting position of the opening 55 can be set according to actual needs, and the embodiments of the present application will not be described one by one.

[0072] Among them, the shape of the opening 55 is circular or elliptical. It can be understood that the shape of the opening 55 can also be square or irregular. The specific shape of the opening 55 can be set according to the shape and size of the camera module 60. The embodiment of the present application does not further limit the specific shape of the opening 55.

[0073] Please also read Figure 5 , Figure 5 A second structural schematic diagram of the back cover in the electronic device provided in an embodiment of the present application; the back cover 50 can also be provided with a through hole 56, and the through hole 56 is located between the first gap 51 and the opening 55, and the through hole 56 and the opening 55 are interconnected, so that the differential excitation current signal transmitted by the near field communication coil 22 is transmitted to the outside of the electronic device through the opening 55 and the through hole 56, so that more differential excitation current signals can be transmitted to the outside of the electronic device, thereby improving the performance of the NFC antenna.

[0074] Understandably, see Figure 6 , Figure 6 This is a third structural schematic diagram of the back cover of the electronic device provided in an embodiment of the present application. In order to further improve the performance of the NFC antenna, the through hole 56 can be interconnected with the opening 55 and the first gap 51, so that the differential excitation current signal transmitted by the near field communication coil 22 can be transmitted to the outside of the electronic device through the opening 55, the through hole 56 and the first gap 51, so that more differential excitation current signals can be transmitted to the outside of the electronic device, so as to further improve the performance of the NFC antenna.

[0075] Understandable, see Figure 7 , Figure 7 The fourth structural schematic diagram of the back cover in the electronic device provided in the embodiment of the present application, the first metal branch may also be located at the upper end or the lower end of the back cover 50, for example, when the first metal branch is located at the upper end of the back cover 50 and the second metal branch is located at the right end of the back cover 50, the through hole 56 on the back cover 50 is located at the upper end of the back cover 50, and the through hole 56 is located between the first gap 51 and the opening 55, wherein the setting position of the through hole 56 can be adapted to the position of the first metal branch, and it can be understood that the setting position of the through hole 56 can also be adapted to the position of the second metal branch.

[0076] Please continue reading Figure 3 and Figure 4 In order to further improve the performance of the NFC antenna, when the first conductor structure 23 and the second conductor structure 24 are located at the metal back cover 50, the first grounding end 232 and the second grounding end 242 of the first conductor structure 23 and the second conductor structure 24 are arranged away from the near field communication coil 22. For example, the first grounding end 232 is arranged at one end of the first metal branch and away from the first break 53, and the second grounding end 242 is arranged at one end of the second metal branch and away from the second break 54. Since the grounding ends of the first conductor structure 23 and the second conductor structure 24 are not arranged close to the near field communication coil 22, the differential excitation current transmitted by the NFC antenna can form a forward eddy current, thereby improving the performance of the NFC antenna.

[0077] For another example, a first metal branch and a second metal branch are disposed on the middle frame 20 at intervals. The first metal branch forms a first conductor structure 23 , and the second metal branch forms a second conductor structure 24 .

[0078] See also Figure 8 , Figure 8A schematic diagram of the structure of the middle frame of the electronic device provided in an embodiment of the present application, the middle frame 20 includes a substrate 201 and a metal frame 202. Among them, the substrate 201 can be a thin plate or sheet-like structure. In some embodiments, structures such as holes or grooves can be formed on the substrate 201. The holes or grooves formed on the substrate 201 can be used to install other electronic components of the electronic device 100. For example, electronic components such as cameras and circuit boards of the electronic device 100 can be installed on the substrate 201 through holes or grooves. The material of the substrate 201 may include metal or plastic. For example, the substrate 201 may be an aluminum alloy substrate.

[0079] The metal frame 202 is formed at the periphery of the substrate 201. For example, the metal frame 202 can be formed by a metal material arranged around the periphery of the substrate 201. The material of the metal frame 202 can include metals such as aluminum alloy and magnesium alloy. For example, in some embodiments, the metal frame 202 can be a magnesium alloy metal frame. The width of the metal frame 202 can be between 2 mm (millimeter) and 5 mm.

[0080] The metal frame 202 is provided with fractures, such as a third fracture 2021, which is arranged to penetrate the thickness direction of the metal frame 202 to divide the metal frame 202 into at least a first metal part 2022 and a second metal part 2023, wherein the first metal part 2022 forms a first metal branch and the second metal part 2023 forms a second metal branch.

[0081] A gap 2011 is provided between the metal frame 202 and the substrate 201, and the gap 2011 is interconnected with the third break 2021, and the third break 2021 divides the gap 2011 into a first part and a second part. For example, the gap 2011 extends from the third break 2021 along the metal frame 202 to the left to form a first part, and the gap 2011 extends from the third break 2021 along the metal frame 202 to the right to form a second part. The metal frame 202 corresponding to the first part is the first metal part 2022, and the metal frame corresponding to the second part is the second metal part 2023.

[0082] It can be understood that in order to improve the structural strength of the electronic device, the third fracture 2021 and the gap 2011 may be filled with plastic material, and the plastic material seals the third fracture 2021 and the gap 2011 .

[0083] It is understandable that in order to improve the appearance of the electronic device, the third slit 2021 and the gap 2011 can be filled with plastic material of the same color as the metal frame 202 to reduce the types of appearance colors of the electronic device 100, which helps to improve the appearance of the electronic device.

[0084] It can be understood that the middle frame 20 may also include a substrate and a plastic frame, the plastic frame is arranged around the substrate, and two metal sheets are arranged on the plastic frame to form a first metal branch and a second metal branch.

[0085] It can be understood that when a first metal branch is set on the middle frame 20 to form a first conductor structure 23, and a second metal branch is set to form a second conductor structure 24, a through hole, such as a through hole 56, can also be set on the back cover 50. The through hole 56 is connected to the opening 55 and the gap 2011 to enable the differential excitation current signal transmitted by the near field communication coil 22 to be transmitted to the outside of the electronic device through the opening 55, the through hole 56 and the gap 2011, so that more differential excitation current signals can be transmitted to the outside of the electronic device, so as to further improve the performance of the NFC antenna.

[0086] The camera module 60 may include a camera and a metal decorative part. The camera is used to collect ambient light signals for imaging, thereby realizing photo taking or video recording. The camera may include a lens and a base. The lens is mounted on the base to fix the lens. The base may be mounted on the middle frame 20, or on the circuit board 30 for fixing.

[0087] Among them, the metal decorative part forms a mounting hole around the camera, and the camera is located in the mounting hole. On the one hand, the metal decorative part can play a decorative role to prevent the internal structure of the camera from being observed from the outside of the electronic device; on the other hand, it can also play a role in assisting the fixation of the camera and enhancing the structural stability of the camera.

[0088] The near field communication coil 22 may be disposed around the periphery of the camera, or the near field communication coil 22 may be disposed around the periphery of the metal decorative component.

[0089] When the near field communication coil 22 is arranged around the periphery of the camera, the camera includes a lens and a base, the lens is fixed on the base, and the near field communication coil 22 can be arranged around the base, and can also be arranged around one end of the lens close to the base.

[0090] When the NFC coil 22 is disposed around the periphery of the metal decoration part, the NFC coil 22 is an open coil to form two ends, which are used to be electrically connected to the NFC IC 21 and the first conductor structure 23 .

[0091] The material of the metal decorative parts may include, for example, aluminum alloy, magnesium alloy, copper alloy and the like.

[0092] The metal decorative part is provided with a third gap, and the third gap is located between the through hole 56 and the opening 55. The third gap passes through the metal decorative part to divide the metal decorative part into two parts, and the third gap is connected to the mounting hole. When the near-field communication coil 22 transmits the differential excitation current, the transmission direction of the induced current generated in the metal decorative part can be changed, so that the direction of the differential excitation current transmitted by the near-field communication coil 22 and the direction of the induced current generated in the metal decorative part are perpendicular to each other, forming orthogonal polarization, so as to reduce the interference of the induced magnetic field formed in the metal decorative part on the near-field communication signal, thereby further improving the performance of the NFC antenna.

[0093] It can be understood that the camera module 60 may also include multiple cameras. When the camera module 60 includes multiple cameras, the near-field communication coil 22 may be arranged around the periphery of at least one camera. For example, the near-field communication coil 22 may be arranged around the periphery of one camera, or the near-field communication coil 22 may be arranged around the peripheries of two cameras.

[0094] It can be understood that when the camera module 60 includes multiple cameras, the near field communication coil 22 can also be arranged around the periphery of the metal decorative part.

[0095] Among them, the number of cameras can be two, three or four, etc., and the number of cameras can be flexibly set according to actual needs.

[0096] The following is a detailed description taking the camera module 60 including two cameras as an example.

[0097] Please continue reading Figure 6 Also see Fig. 9 , Fig. 9 A schematic diagram of a first connection structure of a camera module and a near field communication coil provided in an embodiment of the present application. The camera module 60 includes two cameras 61 and a metal decorative member 62, and the metal decorative member 62 is arranged around each camera 61. The two cameras are a first camera 61a and a second camera 61b.

[0098] The metal decoration part 62 is provided with two mounting holes 621, such as a first mounting hole 621a and a second mounting hole 621b. The first mounting hole 621a is used to mount a first camera 61a, and the second mounting hole 621b is used to mount a second camera 61b.

[0099] The metal decorative part 62 is also provided with a fourth gap 622 and a fifth gap 623. The fourth gap 622 is arranged adjacent to the first mounting hole 621a. The fourth gap 622 runs through the metal decorative part 62 to divide the metal decorative part 62 into two parts. The fifth gap 623 is located between the first mounting hole 621a and the second mounting hole 621b, and the fourth gap 622, the fifth gap 623, the first mounting hole 621a and the second mounting hole 621b are interconnected, so that the fourth gap 622, the first mounting hole 621a, the second mounting hole 621b, and the fifth gap 623 can be formed as a whole.

[0100] When the near-field communication coil 22 is arranged around the metal decorative part 62, since the fourth gap 622 and the fifth gap 623 are arranged in the metal decorative part 62, when the near-field communication coil 22 transmits the differential excitation current, the transmission direction of the induced current generated in the metal decorative part 62 can be changed, so that the direction of the differential excitation current transmitted by the near-field communication coil 22 and the direction of the induced current generated in the metal decorative part 62 are perpendicular to each other, forming orthogonal polarization, so as to reduce the interference of the induced magnetic field formed in the metal decorative part 62 on the near-field communication signal, thereby further improving the performance of the NFC antenna.

[0101] Understandably, please also refer to Figure 7 and Fig.10 , Fig.10 A schematic diagram of a second connection structure of a camera module and a near-field communication coil provided in an embodiment of the present application; the camera module 60 may also include three cameras 61 and a metal decorative part 62, the three cameras 61 being such as a first camera 61a, a second camera 61a and a third camera 61c, the metal decorative part 62 being provided with three mounting holes 621, the three mounting holes 621 being such as a first mounting hole 621a, a second mounting hole 621b and a third mounting hole 621c, the first mounting hole 621a being used to mount the first camera 61a, the second mounting hole 621b being used to mount the second camera 61b, and the third mounting hole 621c being used to mount the third camera 61c.

[0102] Among them, the metal decorative part 62 is also provided with three gaps, such as a fourth gap 622, a fifth gap 623 and a sixth gap 624. The fourth gap 622 is arranged adjacent to the first mounting hole 621a. The fourth gap 622 is arranged through the metal decorative part 62 to divide the metal decorative part 62 into two parts. The fifth gap 623 is located between the first mounting hole 621a and the second mounting hole 621b, and the sixth gap 624 is located between the second mounting hole 621b and the third mounting hole 621c. The fourth gap 622, the fifth gap 623, the sixth gap 624, the first mounting hole 621a, the second mounting hole 621b, and the third mounting hole 621c are connected to each other, so that the third mounting hole 621c, the sixth gap 624, the second mounting hole 621b, the fifth gap 623, the first mounting hole 621a, and the fourth gap 622 can be formed as a whole.

[0103] When the near-field communication coil 22 is arranged around the metal decorative part 62, since the fourth gap 622, the fifth gap 623 and the sixth gap 624 are arranged in the metal decorative part 62, when the near-field communication coil 22 transmits the differential excitation current, the transmission direction of the induced current generated in the metal decorative part 62 can be changed, so that the direction of the differential excitation current transmitted by the near-field communication coil 22 and the direction of the induced current generated in the metal decorative part 62 are perpendicular to each other, forming orthogonal polarization, so as to reduce the interference of the induced magnetic field formed in the metal decorative part 62 on the near-field communication signal, thereby further improving the performance of the NFC antenna.

[0104] See also Fig.11 , Fig.11 A second structural diagram of an antenna device and a camera module in an electronic device provided in an embodiment of the present application. The antenna device 200 further includes a first non-near field communication chip 26 and a second non-near field communication chip 27. The first non-near field communication chip 26 is such as IC1, and the second non-near field communication chip 27 is such as IC2. It can be understood that the first non-near field communication chip 26 and the second non-near field communication chip 27 can be integrated on the circuit board 30 of the electronic device 100.

[0105] The first non-near field communication chip 26 is used to provide a first non-near field communication excitation signal. The first non-near field communication excitation signal is an unbalanced signal. The first non-near field communication excitation signal may include one of a cellular network signal, a Wireless Fidelity (Wi-Fi) signal, a Global Positioning System (GPS) signal, and a Bluetooth (BT) signal. Accordingly, the first non-near field communication chip 26 may be a cellular communication chip for providing the cellular network signal; the first non-near field communication chip 26 may be a Wi-Fi chip for providing the Wi-Fi signal; the first non-near field communication chip 26 may be a GPS chip for providing the GPS signal; the first non-near field communication chip 26 may also be a BT chip for providing the BT signal.

[0106] The first conductor structure 23 also includes a third feeding terminal 233. The third feeding terminal 233 is spaced apart from the first feeding terminal 231 and the first grounding terminal 232. The third feeding terminal 233 is electrically connected to the first non-near field communication chip 26, and the first non-near field communication chip 26 is grounded. Thus, the first non-near field communication chip 26 can feed the first non-near field communication excitation signal to the first conductor structure 23 through the third feeding terminal 223. Therefore, the first conductor structure 23 can also be used to transmit the first non-near field communication excitation signal.

[0107] It can be understood that the first conductor structure 23 can be used to transmit the differential excitation current signal provided by the NFC IC21, and can also be used to transmit the first non-near field communication excitation signal provided by the first non-near field communication chip 26, so that the first conductor structure 23 can be reused, and the number of conductor structures used to transmit wireless signals in the electronic device 100 can be reduced, thereby saving the internal space of the electronic device 100.

[0108] Among them, it should be noted that the frequency of NFC signals is usually 13.56MHz (megahertz), the frequency of cellular network signals is usually above 700MHz, the frequency of Wi-Fi signals is usually 2.4GHz (gigahertz) or 5GHz, the frequency of GPS signals usually includes multiple frequency bands such as 1.575GHz, 1.227GHz, 1.381GHz, 1.841GHz, and the frequency of BT signals is usually 2.4GHz. Therefore, relative to cellular network signals, Wi-Fi signals, GPS signals, and BT signals, NFC signals are low-frequency signals, while cellular network signals, Wi-Fi signals, GPS signals, and BT signals are all high-frequency signals. Alternatively, it can also be understood that the NFC signal is a low-frequency signal, the first non-near field communication excitation signal is a high-frequency signal, and the frequency of the NFC signal is less than the frequency of the first non-near field communication excitation signal.

[0109] In addition, it should be noted that when transmitting a wireless signal, the lower the frequency of the wireless signal, the longer the required radiator length is; and the higher the frequency of the wireless signal, the shorter the required radiator length is. That is, the length of the radiator required to transmit the NFC signal is greater than the length of the radiator required to transmit the first non-near field communication excitation signal.

[0110] Therefore, in the first conductor structure 23, the distance between the first feeding terminal 231 and the first ground terminal 232 is greater than the distance between the third feeding terminal 233 and the first ground terminal 232. Thus, in the first conductor structure 23, the length of the radiator that transmits the NFC signal is greater than the length of the radiator that transmits the first non-near field communication excitation signal.

[0111] In addition, in order to reduce the overall length of the first conductor structure 23, it can be set that the third feeding terminal 233 and the first feeding terminal 231 are located on the same side of the first ground terminal 232. That is, the third feeding terminal 233 is located between the first feeding terminal 231 and the first ground terminal 232. Compared with the third feeding terminal 233 and the first feeding terminal 231 being located on different sides of the first ground terminal 232, the third feeding terminal 233 and the first feeding terminal 231 being located on the same side of the first ground terminal 232 can reuse the portion between the third feeding terminal 233 and the first ground terminal 232, thereby reducing the overall length of the first conductor structure 23.

[0112] The second non-near field communication chip 27 is used to provide a second non-near field communication excitation signal. Among them, the second non-near field communication excitation signal is an unbalanced signal. The second non-near field communication excitation signal may include one of a cellular network signal, a wireless fidelity signal (Wi-Fi signal), a global positioning system signal (GPS signal), and a Bluetooth signal (BT signal). Accordingly, the second non-near field communication chip 27 may be a cellular communication chip for providing the cellular network signal; the second non-near field communication chip 27 may be a Wi-Fi chip for providing the Wi-Fi signal; the second non-near field communication chip 27 may be a GPS chip for providing the GPS signal; the second non-near field communication chip 27 may also be a BT chip for providing the BT signal.

[0113] It should be noted that the second non-near field communication excitation signal and the first non-near field communication excitation signal can be signals of the same communication type or signals of different communication types. Correspondingly, the second non-near field communication chip 27 and the first non-near field communication chip 26 can be chips of the same type or chips of different types.

[0114] The second conductor structure 24 further includes a fourth feeding terminal 243. The fourth feeding terminal 243 is spaced apart from the second feeding terminal 241 and the second grounding terminal 242. The fourth feeding terminal 233 is electrically connected to the second non-near field communication chip 27, and the second non-near field communication chip 27 is grounded. Thus, the second non-near field communication chip 27 can feed the second non-near field communication signal to the second conductor structure 24 through the fourth feeding terminal 243. Therefore, the second conductor structure 24 can also be used to transmit the second non-near field communication excitation signal.

[0115] It can be understood that the second conductor structure 24 can be used to transmit the differential excitation current signal provided by the NFC IC 21, and can also be used to transmit the second non-near field communication excitation signal provided by the second non-near field communication chip 27, so that the second conductor structure 24 can be reused, and the number of conductor structures used to transmit wireless signals in the electronic device 100 can be further reduced, thereby further saving the internal space of the electronic device 100.

[0116] Similarly, in the second conductor structure 24, the distance between the second feeding terminal 241 and the second ground terminal 242 is greater than the distance between the fourth feeding terminal 243 and the second ground terminal 242. Thus, in the second conductor structure 24, the length of the radiator that transmits the NFC signal is greater than the length of the radiator that transmits the second non-near field communication excitation signal.

[0117] In addition, in order to reduce the overall length of the second conductor structure 24, it can be set that the fourth feeding terminal 243 and the second feeding terminal 241 are located on the same side of the second ground terminal 242. That is, the fourth feeding terminal 243 is located between the second feeding terminal 241 and the second ground terminal 242. Compared with the fourth feeding terminal 243 and the second feeding terminal 241 being located on different sides of the second ground terminal 242, the fourth feeding terminal 243 and the second feeding terminal 241 being located on the same side of the second ground terminal 242 can reuse the portion between the fourth feeding terminal 243 and the second ground terminal 242, thereby reducing the overall length of the second conductor structure 24.

[0118] refer to Fig.12 , Fig.12 A third structural diagram of an antenna device and a camera module in an electronic device provided in an embodiment of the present application. The antenna device 200 further includes a first matching circuit M1, a second matching circuit M2, a third matching circuit M3, a first filter circuit LC1, a second filter circuit LC2, a third filter circuit LC3, and a fourth filter circuit LC4. It can be understood that the matching circuit can also be referred to as a matching network, a tuning circuit, a tuning network, etc. The filter circuit can also be referred to as a filter network.

[0119] The first matching circuit M1 is electrically connected to the first differential signal terminal 211 of the NFC IC 21, the second differential signal terminal 212 of the NFC IC 21, the first feeding terminal 231 of the first conductor structure 23, and the second feeding terminal 241 of the second conductor structure 24. The first matching circuit M1 is used to match the impedance of the conductive loop when transmitting the differential excitation current. The conductive loop is a conductive loop formed by the near field communication coil 22, the first conductor structure 23, the conductive path on the ground plane 25, and the second conductor structure 24.

[0120] The first matching circuit M1 includes a first input terminal a, a second input terminal b, a first output terminal c, and a second output terminal d. The first input terminal a is electrically connected to the first differential signal terminal 211 of the NFCIC 21, the second input terminal b is electrically connected to the second differential signal terminal 212 of the NFC IC 21, the first output terminal c is electrically connected to the first feeding terminal 231 of the first conductor structure 23, and the second output terminal d is electrically connected to the second feeding terminal 241 of the second conductor structure 24.

[0121] The first filter circuit LC1 is arranged between the first differential signal terminal 211 of the NFCIC 21 and the first input terminal a of the first matching circuit M1. The first filter circuit LC1 is used to filter out the first interference signal between the first differential signal terminal 211 and the first input terminal a. The first interference signal is an electrical signal other than the differential excitation current provided by the NFC IC 21.

[0122] The second filter circuit LC2 is arranged between the second differential signal terminal 212 of the NFC IC 21 and the second input terminal b of the first matching circuit M1. The second filter circuit LC2 is used to filter out the second interference signal between the second differential signal terminal 212 and the second input terminal b. The second interference signal is an electrical signal other than the differential excitation current provided by the NFC IC 21.

[0123] The second matching circuit M2 is electrically connected to the first non-near field communication chip 26 and the third feeding end 233 of the first conductor structure 23. The second matching circuit M2 is used to match the impedance of the first conductor structure 23 when transmitting the first non-near field communication excitation signal.

[0124] The third filter circuit LC3 is arranged between the first non-near field communication chip 26 and the second matching circuit M2. The third filter circuit LC3 is used to filter out the third interference signal between the first non-near field communication chip 26 and the second matching circuit M2. The third interference signal is an electrical signal other than the first non-near field communication excitation signal provided by the first non-near field communication chip 26.

[0125] The third matching circuit M3 is electrically connected to the second non-near field communication chip 27 and the fourth feeding end 243 of the second conductor structure 24. The third matching circuit M3 is used to match the impedance of the second conductor structure 24 when transmitting the second non-near field communication excitation signal.

[0126] The fourth filter circuit LC4 is arranged between the second non-near field communication chip 27 and the third matching circuit M3. The fourth filter circuit LC4 is used to filter out the fourth interference signal between the second non-near field communication chip 27 and the third matching circuit M33. The fourth interference signal is an electrical signal other than the second non-near field communication excitation signal provided by the second non-near field communication chip 27.

[0127] It can be understood that the first matching circuit M1, the second matching circuit M2, and the third matching circuit M3 can all include circuits composed of capacitors and inductors connected in series or in parallel. The first filter circuit LC1, the second filter circuit LC2, the third filter circuit LC3, and the fourth filter circuit LC4 can also include circuits composed of capacitors and inductors connected in series or in parallel.

[0128] refer to Fig.13 , Fig.13 A fourth structural schematic diagram of an antenna device and a camera module in an electronic device provided in an embodiment of the present application.

[0129] The first matching circuit M1 may include, for example, four capacitors C1, C2, C3, and C4. The capacitor C1 is connected in series with the first differential signal terminal 211 of the NFCIC 21, and the capacitor C2 is connected in series with the second differential signal terminal 212 of the NFCIC 21. The capacitor C3 is connected in series with the capacitor C4, and after the series connection, is connected in parallel with the NFC IC 21, and the capacitor C3 and the capacitor C4 are grounded. It can be understood that the capacitance values ​​of the capacitors C1, C2, C3, and C4 can be set according to actual needs.

[0130] The first filter circuit LC1 may include, for example, an inductor L1 and a capacitor C5. The inductor L1 is connected in series between the first differential signal terminal 211 and the first matching circuit M1, and the capacitor C5 is connected in parallel with the NFCIC 21 and grounded. It can be understood that the inductance value of the inductor L1 and the capacitance value of the capacitor C5 can be set according to actual needs.

[0131] The second filter circuit LC2 may include, for example, an inductor L2 and a capacitor C6. The inductor L2 is connected in series between the second differential signal terminal 212 and the first matching circuit M1, and the capacitor C6 is connected in parallel with the NFCIC 21 and grounded. It can be understood that the inductance value of the inductor L2 and the capacitance value of the capacitor C6 can be set according to actual needs.

[0132] The second matching circuit M2 may include, for example, capacitors C7 and C8. The capacitor C7 is connected in series between the third feeding terminal 233 of the first conductor structure 23 and the first non-near field communication chip 26, and the capacitor C8 is connected in parallel with the first non-near field communication chip 26 and grounded. It can be understood that the capacitance values ​​of the capacitors C7 and C8 can be set according to actual needs.

[0133] The third filter circuit LC3 may include, for example, an inductor L3 and a capacitor C9. The inductor L3 is connected in series between the first non-near field communication chip 26 and the second matching circuit M2, and the capacitor C9 is connected in parallel with the first non-near field communication chip 26 and grounded. It can be understood that the inductance value of the inductor L3 and the capacitance value of the capacitor C9 can be set according to actual needs.

[0134] The third matching circuit M3 may include, for example, capacitors C10 and C11. The capacitor C10 is connected in series between the fourth feeding terminal 243 of the second conductor structure 24 and the second non-near field communication chip 27, and the capacitor C11 is connected in parallel with the second non-near field communication chip 27 and grounded. It can be understood that the capacitance values ​​of the capacitors C10 and C11 can be set according to actual needs.

[0135] The fourth filter circuit LC4 may include, for example, an inductor L4 and a capacitor C12. The inductor L4 is connected in series between the second non-near field communication chip 27 and the third matching circuit M3, and the capacitor C12 is connected in parallel with the second non-near field communication chip 27 and grounded. It can be understood that the inductance value of the inductor L4 and the capacitance value of the capacitor C12 can be set according to actual needs.

[0136] The antenna device and electronic device provided in the embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.

Claims

1. An antenna device, characterized in that: Applied to an electronic device, the electronic device comprises a metal back cover and a camera module, the metal back cover is provided with an opening, the camera module is arranged in the opening, the camera module comprises at least one camera and a metal decorative piece, the metal decorative piece is provided with at least one mounting hole and a third slit, one of the cameras is arranged in one of the mounting holes, the third slit is arranged through the metal decorative piece to divide the metal decorative piece into two parts, and the third slit is communicated with the mounting hole; The antenna device comprises: Ground plane; A near field communication chip for providing a differential excitation current; A near field communication coil, used to be arranged at the periphery of the camera module and around the metal decorative piece, the near field communication coil being electrically connected to the near field communication chip; A first conductor structure is electrically connected to the near field communication coil, and the first conductor structure is electrically connected to the ground plane and is grounded; A second conductor structure is electrically connected to the near field communication chip, and the second conductor structure is electrically connected to the ground plane and is grounded; Wherein, the near-field communication coil, the first conductor structure, and the second conductor structure are used to jointly transmit the differential excitation current. When transmitting the differential excitation current, the direction of the induced current generated in the metal decorative part is perpendicular to the direction in which the near-field communication coil transmits the differential excitation current. The near-field communication coil forms a first near-field communication radiation field, the first conductor structure forms a second near-field communication radiation field, and the second conductor structure forms a third near-field communication radiation field. The first near-field communication radiation field is used to enhance the second near-field communication radiation field and the third near-field communication radiation field; wherein, The first near field communication radiated field at least partially overlaps with the second near field communication radiated field and the third near field communication radiated field.

2. The antenna device according to claim 1, characterized in that The near field communication chip comprises a first differential signal terminal and a second differential signal terminal, wherein the first differential signal terminal and the second differential signal terminal are used to provide the differential excitation current; The ground plane comprises a first ground point and a second ground point which are spaced apart from each other, and the ground plane forms a conductive path between the first ground point and the second ground point; The first conductor structure comprises a first feeding end and a first grounding end which are arranged at intervals, the first feeding end is electrically connected to the first differential signal end through the near field communication coil, and the first grounding end is electrically connected to the first grounding point; The second conductor structure comprises a second feeding terminal and a second grounding terminal which are arranged at intervals, the second feeding terminal is electrically connected to the second differential signal terminal, and the second grounding terminal is electrically connected to the second grounding point; The near field communication coil, the first conductor structure, the conductive path and the second conductor structure together form a conductive loop for transmitting the differential excitation current.

3. The antenna device according to claim 2, characterized in that: When the first differential signal terminal of the near field communication chip is positive, the differential excitation current in the near field communication coil is transmitted in a counterclockwise direction; When the first differential signal terminal of the near field communication chip is a negative pole, the differential excitation current in the near field communication coil is transmitted in a clockwise direction.

4. The antenna device according to claim 2, characterized in that: Also includes: The first matching circuit is electrically connected to the first differential signal end, the second differential signal end, the first feeding end, and the second feeding end respectively, and the first matching circuit is used to match the impedance of the conductive loop when transmitting the differential excitation current.

5. The antenna device according to claim 2, characterized in that: Also includes: A first non-near field communication chip, used to provide a first non-near field communication excitation signal; The first conductor structure further includes a third feeding end, the third feeding end is electrically connected to the first non-near field communication chip, and the first conductor structure is also used to transmit the first non-near field communication excitation signal.

6. The antenna device according to claim 5, characterized in that Also includes: The second matching circuit is electrically connected to the first non-near field communication chip and the third feeding end respectively, and the second matching circuit is used to match the impedance of the first conductor structure when transmitting the first non-near field communication excitation signal.

7. The antenna device according to claim 2, characterized in that: Also includes: A second non-near field communication chip, used to provide a second non-near field communication excitation signal; The second conductor structure further includes a fourth feeding end, the fourth feeding end is electrically connected to the second non-near field communication chip, and the second conductor structure is further used to transmit the second non-near field communication excitation signal.

8. The antenna device according to claim 7, characterized in that: Also includes: The third matching circuit is electrically connected to the second non-near field communication chip and the fourth feeding end respectively, and the third matching circuit is used to match the impedance of the second conductor structure when transmitting the second non-near field communication excitation signal.

9. An electronic device, characterized in that: It comprises an antenna device, and the antenna device is the antenna device according to any one of claims 1-8.

10. The electronic device according to claim 9, characterized in that: Also includes: The middle frame is connected to the metal back cover, and the middle frame is provided with a first metal branch and a second metal branch. The first metal branch forms the first conductor structure, and the second metal branch forms the second conductor structure.

11. The electronic device according to claim 9, characterized in that: The metal back cover is provided with a first metal branch and a second metal branch. The first metal branch forms the first conductor structure, and the second metal branch forms the second conductor structure.

12. The electronic device according to claim 11, characterized in that: The metal back cover is provided with a first gap and a second gap at intervals, so as to form the first metal branch and the second metal branch on the metal back cover.

13. The electronic device according to claim 12, characterized in that: The metal back cover is provided with a through hole, which is arranged between the opening and the first gap, and the through hole is connected to the opening and the first gap, so that the near field communication coil transmits the differential excitation current to the outside of the electronic device through the opening, the through hole and the first gap in sequence.

14. The electronic device according to any one of claims 9 to 13, characterized in that: The camera module includes a plurality of cameras, and the near field communication coil is arranged around at least one of the cameras.

15. The electronic device according to any one of claims 9 to 13, characterized in that: The camera module includes a first camera, a second camera, a third camera and a metal decorative part; The metal decorative part is provided with a first mounting hole, a second mounting hole and a third mounting hole at intervals, the first camera is arranged in the first mounting hole, the second camera is arranged in the second mounting hole, the third camera is arranged in the third mounting hole, and the near field communication coil is arranged around the metal decorative part.

16. The electronic device according to claim 15, characterized in that: The metal decorative part is also provided with a fourth gap, a fifth gap and a sixth gap. The fourth gap is set through the metal decorative part to divide the metal decorative part into two parts, the fifth gap is located between the first mounting hole and the second mounting hole, and the sixth gap is located between the second mounting hole and the third mounting hole. The fourth gap, the fifth gap, the sixth gap, the first mounting hole, the second mounting hole and the third mounting hole are interconnected so that the direction of the induced current generated in the metal decorative part is perpendicular to the direction of the differential excitation current transmitted by the near field communication coil.

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