Antenna device and electronic equipment

Abstract

The embodiment of the present application provides an antenna device and an electronic device, the antenna device comprising: a near field communication chip for providing a differential excitation current; a first antenna, the first antenna for transmitting the differential excitation current and radiating a near field communication signal at a first near field communication resonant frequency; a second antenna, the second antenna for transmitting the differential excitation current and radiating a near field communication signal at a second near field communication resonant frequency; the first near field communication resonant frequency is different from the second near field communication resonant frequency. In the electronic device, since the NFC resonant frequency of the first antenna is different from the NFC resonant frequency of the second antenna, that is, the first antenna and the second antenna can operate in different frequency bands, the electronic device can support near field communication in multiple frequency bands, thereby improving the communication adaptability of the electronic device.

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 diverse. For example, electronic devices can gradually realize near field communication (NFC) recently.

[0003] However, electronic devices usually only support near-field communication in a single frequency band, which cannot meet application requirements. Summary of the invention

[0004] The embodiments of the present application provide an antenna device and an electronic device, which can enable the electronic device to support multi-band near-field communication, thereby improving the communication adaptability of the electronic device.

[0005] An embodiment of the present application provides an antenna device, including:

[0006] A near field communication chip, comprising 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 a differential excitation current;

[0007] a first antenna, electrically connected to the first differential signal end, the first antenna being used to transmit the differential excitation current and radiate a near field communication signal at a first near field communication resonant frequency;

[0008] a second antenna, electrically connected to the second differential signal end, the second antenna being used to transmit the differential excitation current and radiate a near field communication signal at a second near field communication resonant frequency;

[0009] The first near field communication resonant frequency is different from the second near field communication resonant frequency.

[0010] An embodiment of the present application further provides an electronic device, including an antenna device, wherein the antenna device is the above-mentioned antenna device.

[0011] In the electronic device provided in the embodiment of the present application, since the NFC resonant frequency of the first antenna is different from the NFC resonant frequency of the second antenna, that is, the first antenna and the second antenna can operate in different frequency bands, the electronic device can support multi-band near-field communication, thereby improving the communication adaptability of the electronic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] 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.

[0013] Figure 1 A first structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0014] Figure 2 A first structural schematic diagram of an antenna device provided in an embodiment of the present application.

[0015] Figure 3 A second structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0016] Figure 4 A third structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0017] Figure 5 A fourth structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0018] Figure 6 A fifth structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0019] Figure 7 A sixth structural schematic diagram of the antenna device provided in an embodiment of the present application.

[0020] Figure 8 A second structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0021] Fig. 9 A third structural schematic diagram of the electronic device provided in an embodiment of the present application.

[0022] Fig.10 A fourth structural schematic diagram of an electronic device provided in an embodiment of the present application.

[0023] Fig.11 A fifth structural schematic diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] refer to Figure 1 , Figure 1 A first structural diagram of an electronic device 100 provided in an embodiment of the present application.

[0027] The electronic device 100 includes a display screen 10 , a housing 20 , a circuit board 30 and a battery 40 .

[0028] The display screen 10 is disposed on the housing 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).

[0029] The housing 20 is used to form the outer contour of the electronic device 100, so as to accommodate the electronic devices and functional components of the electronic device 100, and to seal and protect the electronic devices and functional components inside the electronic device. For example, the camera, circuit board, vibration motor and other functional components of the electronic device 100 can be arranged inside the housing 20.

[0030] The circuit board 30 is disposed inside the housing 20. The circuit board 30 may be a mainboard of the electronic device 100. The circuit board 30 may also be integrated with one or more functional components such as a processor, a camera, an earphone jack, an acceleration sensor, a gyroscope, and a motor. 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.

[0031] The battery 40 is disposed inside the housing 20. 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.

[0032] The electronic device 100 is also provided with an antenna device 200. The antenna device 200 is used to implement the wireless communication function of the electronic device 100. For example, the antenna device 200 can be used to implement the Near Field Communication (NFC) function. The antenna device 200 is arranged inside the housing 20 of the electronic device 100. It can be understood that some components of the antenna device 200 can be integrated on the circuit board 30 inside the housing 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 arranged inside the housing 20. For example, the antenna of the antenna device 200 can be directly arranged inside the housing 20.

[0033] refer to Figure 2 , Figure 2 The first structural diagram of the antenna device 200 provided in the embodiment of the present application is shown in FIG.

[0034] 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.

[0035] The near field communication chip (NFC chip) 21 is used to provide a differential excitation current. The differential excitation current may include two differential signals, and the two differential signals may be output as two independent signals, and independent matching circuits are provided for matching. Among them, the two differential signals include two current signals. The two current signals have the same amplitude and opposite phases, or it can be understood that the two current signals differ in phase by 180 degrees. In addition, the two differential signals are balanced signals. It can be understood that during the transmission process, if an analog signal is directly transmitted, 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.

[0036] The NFC chip 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 chip 21, and the second differential signal terminal 212 may be a negative (-) port of the NFC chip 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 first differential signal terminal 211 may be used to provide one differential signal in the differential excitation current, and the second differential signal terminal 212 may be used to provide another differential signal in the differential excitation current.

[0037] It is understandable that the NFC chip 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 chip 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.

[0038] The first antenna 22 and the second antenna 23 are both electrically connected to the NFC chip 21. For example, the first antenna 22 can be electrically connected to the first differential signal terminal 211 of the NFC chip 21, and the second antenna 23 can be electrically connected to the second differential signal terminal 212 of the NFC chip 21. In addition, the first antenna 22 and the second antenna 23 are both grounded, so that the NFC chip 21, the first antenna 22, and the second antenna 23 can form a signal loop.

[0039] The first antenna 22 is used to transmit the differential excitation current, for example, to transmit a differential signal in the differential excitation current, and to radiate a near field communication signal (NFC signal) at a first near field communication resonant frequency (NFC resonant frequency). Thus, the first antenna 22 can implement near field communication between the electronic device 100 and other electronic devices at the first NFC resonant frequency.

[0040] The second antenna 23 is used to transmit the differential excitation current, for example, to transmit another differential signal in the differential excitation current, and to radiate an NFC signal at a second NFC resonance frequency. Thus, the second antenna 23 can implement near field communication between the electronic device 100 and other electronic devices at the second NFC resonance frequency.

[0041] Wherein, the first NFC resonant frequency is different from the second NFC resonant frequency. For example, the first NFC resonant frequency may be 13.56 MHz, and the second NFC resonant frequency may be 100 KHz. For another example, the first NFC resonant frequency may be 13.56 MHz, and the second NFC resonant frequency may be 2.4 GHz. For another example, the first NFC resonant frequency may be 100 KHz, and the second NFC resonant frequency may be 2.4 GHz.

[0042] It is understandable that the first antenna 22 and the second antenna 23 may have different characteristics, such as different shapes, sizes, materials, etc., so that the impedances of the first antenna 22 and the second antenna 23 may be different. Therefore, when transmitting the differential excitation current, the first antenna 22 and the second antenna 23 may respectively generate different resonant frequencies.

[0043] In actual applications, different electronic devices may have different communication frequencies when implementing near-field communication. For example, the NFC communication frequency of a subway card reader can be 13.56MHz, while the NFC communication frequency of some access control systems can be 100KHz, and the NFC communication frequency of some devices that support the NFC function may be as high as 2.4GHz. In traditional electronic devices, NFC antennas usually only work in the 13.56MHz frequency band, so they cannot meet the application requirements of multiple scenarios. For example, in traditional electronic devices, when the NFC antenna works at 13.56MHz, the 13.56MHz subway card swiping can be realized through the NFC function, but the 100KHz access control system cannot be opened.

[0044] In the electronic device 100 provided in the embodiment of the present application, since the NFC resonant frequency of the first antenna 22 is different from the NFC resonant frequency of the second antenna 23, that is, the first antenna 22 and the second antenna 23 can operate in different frequency bands, the electronic device 100 can support multi-band near-field communications, thereby improving the communication adaptability of the electronic device 100. For example, the electronic device 100 can simultaneously support 13.56MHz and 100KHz near-field communications, so the electronic device 100 can not only realize 13.56MHz subway card swiping through the NFC function, but also open the 100KHz access control system, thereby expanding the application scope of the electronic device 100 in life.

[0045] In some embodiments, the first antenna 22 generates a first near field communication radiation field (NFC radiation field) when transmitting the differential excitation current. The first NFC radiation field may cover a certain area of ​​space around the electronic device 100. The second antenna 23 generates a second NFC radiation field when transmitting the differential excitation current. The second NFC radiation field may also cover a certain area of ​​space around the electronic device 100. The first NFC radiation field and the second NFC radiation field do not overlap each other. Thus, the first antenna 22 operating at the first resonant frequency and the second antenna 23 operating at the second resonant frequency may be prevented from interfering with each other, thereby improving the working stability of the first antenna 22 and the second antenna 23.

[0046] For example, the first antenna 22 may be disposed at one end of the electronic device 100, such as the top end, and the second antenna 23 may be disposed at another end of the electronic device 100, such as the bottom end, so that the first NFC radiation field generated by the first antenna 22 and the second NFC radiation field generated by the second antenna 23 do not overlap with each other.

[0047] In some embodiments, reference Figure 3 , Figure 3 This is a schematic diagram of a second structure of the antenna device 200 provided in an embodiment of the present application.

[0048] The antenna device 200 further includes a first non-near field communication chip 241. It can be understood that the first non-near field communication chip 241 can be integrated on the circuit board 30 of the electronic device 100.

[0049] The first non-near field communication chip 241 is used to provide a first non-near field communication excitation current. The first non-near field communication excitation current is an unbalanced signal. The first non-near field communication excitation current 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 241 may be a cellular communication chip for providing the cellular network signal; the first non-near field communication chip 241 may be a Wi-Fi chip for providing the Wi-Fi signal; the first non-near field communication chip 241 may be a GPS chip for providing the GPS signal; the first non-near field communication chip 241 may also be a BT chip for providing the BT signal.

[0050] The first antenna 22 is also electrically connected to the first non-near field communication chip 241. The first antenna 22 can also be used to transmit the first non-near field communication excitation current. Therefore, the first antenna 22 can radiate the wireless signal corresponding to the first non-near field communication excitation current to the outside, thereby realizing the corresponding wireless communication function, such as cellular communication function, Wi-Fi communication function, GPS communication function, BT communication function, etc.

[0051] In some embodiments, the first antenna 22 includes a first feeding terminal 221, a second feeding terminal 222, and a first grounding terminal 223. The first feeding terminal 221 is electrically connected to the first differential signal terminal 211 of the NFC chip 21. The second feeding terminal 222 is electrically connected to the first non-near field communication chip 241. The first grounding terminal 223 is grounded.

[0052] The first feeding terminal 221 and the second feeding terminal 222 may be spaced apart from each other. For example, the distance between the first feeding terminal 221 and the first ground terminal 223 may be greater than the distance between the second feeding terminal 222 and the first ground terminal 223 .

[0053] In some embodiments, the first feeding terminal 221 and the second feeding terminal 222 may overlap. Thus, the first differential signal terminal 211 of the NFC chip 21 and the first non-near field communication chip 241 may share a feeding terminal, so as to reduce the number of feeding terminals provided on the first antenna 22, thereby simplifying the setting of the first antenna 22.

[0054] It can be understood that the first antenna 22 can be used to transmit the differential excitation current provided by the NFC chip 21, and can also be used to transmit the first non-near field communication excitation current provided by the first non-near field communication chip 241, so that the first antenna 22 can be reused. Therefore, the number of antennas of the electronic device 100 can be reduced, thereby saving the internal layout space of the electronic device 100.

[0055] In some embodiments, reference Figure 4 , Figure 4 This is a third structural schematic diagram of the antenna device 200 provided in an embodiment of the present application.

[0056] The antenna device 200 further includes a second non-near field communication chip 242. It is understandable that the second non-near field communication chip 242 may also be integrated on the circuit board 30 of the electronic device 100.

[0057] The second non-near field communication chip 242 is used to provide a second non-near field communication excitation current. The second non-near field communication excitation current is an unbalanced signal. The second non-near field communication excitation current may also include one of a cellular network signal, a Wi-Fi signal, a GPS signal, and a BT signal. Accordingly, the second non-near field communication chip 242 may be a cellular communication chip, a Wi-Fi chip, a GPS chip, a BT chip, etc.

[0058] The second antenna 23 is also electrically connected to the second non-near field communication chip 242. The second antenna 23 is also used to transmit the second non-near field communication excitation current. Therefore, the second antenna 23 can radiate the wireless signal corresponding to the second non-near field communication excitation current to the outside, thereby realizing the corresponding wireless communication function, such as cellular communication function, Wi-Fi communication function, GPS communication function, BT communication function, etc.

[0059] In some embodiments, the second antenna 23 includes a third feeding terminal 231, a fourth feeding terminal 232, and a second grounding terminal 233. The third feeding terminal 231 is electrically connected to the second differential signal terminal 212 of the NFC chip 21. The fourth feeding terminal 232 is electrically connected to the second non-near field communication chip 242. The second grounding terminal 233 is grounded.

[0060] The third feeding terminal 231 and the fourth feeding terminal 232 may be spaced apart from each other. For example, the distance between the third feeding terminal 231 and the second ground terminal 233 may be greater than the distance between the fourth feeding terminal 232 and the second ground terminal 233 .

[0061] In some embodiments, the third feeding terminal 231 and the fourth feeding terminal 232 may overlap. Thus, the second differential signal terminal 212 of the NFC chip 21 and the second non-near field communication chip 242 may share a feeding terminal, thereby reducing the number of feeding terminals provided on the second antenna 23, thereby simplifying the configuration of the second antenna 23.

[0062] It can be understood that the second antenna 23 can be used to transmit the differential excitation current provided by the NFC chip 21, and can also be used to transmit the second non-near field communication excitation current provided by the second non-near field communication chip 242, so that the second antenna 23 can be reused. Therefore, the number of antennas of the electronic device 100 can be reduced, thereby saving the internal layout space of the electronic device 100.

[0063] In addition, it can be understood that in some embodiments, the antenna device 200 may also include the first non-near field communication chip 241 and the second non-near field communication chip 242 at the same time, which will not be described in detail here.

[0064] In some embodiments, reference Figure 5 , Figure 5 This is a fourth structural schematic diagram of the antenna device 200 provided in an embodiment of the present application.

[0065] The antenna device 200 further includes a first filter circuit 251, a second filter circuit 252, a third filter circuit 253, a fourth filter circuit 254, a first matching circuit 261, a second matching circuit 262, a third matching circuit 263 and a fourth matching circuit 264. It can be understood that the filter circuit can also be called a filter network, and the matching circuit can also be called a matching network, a tuning circuit, a tuning network, etc.

[0066] The first filter circuit 251 is disposed between the first differential signal terminal 211 of the NFC chip 21 and the first antenna 22. The first filter circuit 251 is used to filter out a first interference signal between the first differential signal terminal 211 and the first antenna 22. The first interference signal is an electrical signal other than the differential excitation current provided by the NFC chip 21, for example, an electrical signal other than the differential signal provided by the first differential signal terminal 211.

[0067] The second filter circuit 252 is disposed between the second differential signal terminal 212 of the NFC chip 21 and the second antenna 23. The second filter circuit 252 is used to filter out a second interference signal between the second differential signal terminal 212 and the second antenna 23. The second interference signal is an electrical signal other than the differential excitation current provided by the NFC chip 21, for example, an electrical signal other than the differential signal provided by the second differential signal terminal 212.

[0068] The third filter circuit 253 is disposed between the first non-near field communication chip 241 and the first antenna 22. The third filter circuit 253 is used to filter out a third interference signal between the first non-near field communication chip 241 and the first antenna 22. The third interference signal is an electrical signal other than the first non-near field communication excitation current provided by the first non-near field communication chip 241.

[0069] The fourth filter circuit 254 is disposed between the second non-near field communication chip 242 and the second antenna 23. The fourth filter circuit 254 is used to filter out a fourth interference signal between the second non-near field communication chip 242 and the second antenna 23. The fourth interference signal is an electrical signal other than the second non-near field communication excitation current provided by the second non-near field communication chip 242.

[0070] It can be understood that the first filter circuit 251, the second filter circuit 252, the third filter circuit 253, and the fourth filter circuit 254 can all include circuits composed of capacitors and inductors connected in series or in parallel.

[0071] The first matching circuit 261 is disposed between the first antenna 22 and the first differential signal terminal 211 of the NFC chip 21, for example, between the first antenna 22 and the first filter circuit 251. The first matching circuit 261 is used to match the impedance when the first antenna 22 transmits the differential excitation current provided by the NFC chip 21, for example, to match the impedance when the first antenna 22 transmits the differential signal provided by the first differential signal terminal 211.

[0072] The second matching circuit 262 is disposed between the second antenna 23 and the second differential signal terminal 212 of the NFC chip 21, for example, between the second antenna 23 and the second filter circuit 252. The second matching circuit 262 is used to match the impedance when the second antenna 23 transmits the differential excitation current provided by the NFC chip 21, for example, to match the impedance when the second antenna 23 transmits the differential signal provided by the second differential signal terminal 212.

[0073] The impedance of the first matching circuit 261 is different from the impedance of the second matching circuit 262 , so that the first antenna 22 and the second antenna 23 can respectively generate different resonance frequencies when transmitting the differential excitation current provided by the NFC chip 21 .

[0074] The third matching circuit 263 is disposed between the first antenna 22 and the first non-near field communication chip 241, for example, between the first antenna 22 and the third filter circuit 253. The third matching circuit 263 is used to match the impedance of the first antenna 22 when transmitting the first non-near field communication excitation current.

[0075] The fourth matching circuit 264 is disposed between the second antenna 23 and the second non-near field communication chip 242, for example, between the second antenna 23 and the fourth filter circuit 254. The fourth matching circuit 264 is used to match the impedance of the second antenna 23 when transmitting the second non-near field communication excitation current.

[0076] It can be understood that the first matching circuit 261, the second matching circuit 262, the third matching circuit 263, and the fourth matching circuit 264 may include a circuit composed of a series connection or a parallel connection of capacitors and inductors.

[0077] In some embodiments, reference Figure 6 , Figure 6 This is a fifth structural schematic diagram of the antenna device 200 provided in an embodiment of the present application.

[0078] The first filtering circuit 251 may include, for example, an inductor L1 and a capacitor C1, wherein the inductor L1 is connected in series between the first differential signal terminal 211 and the first antenna 22, the capacitor C1 is connected between the inductor L1 and the first antenna 22, and the capacitor C1 is grounded.

[0079] The second filtering circuit 252 may include, for example, an inductor L2 and a capacitor C2, wherein the inductor L2 is connected in series between the second differential signal terminal 212 and the second antenna 23, the capacitor C2 is connected between the inductor L2 and the second antenna 23, and the capacitor C2 is grounded.

[0080] The third filtering circuit 253 may include, for example, an inductor L3 and a capacitor C3, wherein the inductor L3 is connected in series between the first non-near field communication chip 241 and the first antenna 22, the capacitor C3 is connected between the inductor L3 and the first antenna 22, and the capacitor C3 is grounded.

[0081] The fourth filtering circuit 254 may include, for example, an inductor L4 and a capacitor C4, wherein the inductor L4 is connected in series between the second non-near field communication chip 242 and the second antenna 23, the capacitor C4 is connected between the inductor L4 and the second antenna 23, and the capacitor C4 is grounded.

[0082] The first matching circuit 261 may include, for example, a capacitor C5 and a capacitor C6. The capacitor C5 is connected in series between the first differential signal terminal 211 and the first antenna 22, for example, between the first filter circuit 251 and the first antenna 22, and the capacitor C6 is connected between the capacitor C5 and the first antenna 22, and the capacitor C6 is grounded. It can be understood that there may be multiple capacitors C5 and C6.

[0083] The second matching circuit 262 may include, for example, a capacitor C7 and a capacitor C8. The capacitor C7 is connected in series between the second differential signal terminal 212 and the second antenna 23, for example, between the second filter circuit 252 and the second antenna 23, and the capacitor C8 is connected between the capacitor C7 and the second antenna 23, and the capacitor C8 is grounded. It can be understood that there may be multiple capacitors C7 and C8.

[0084] The third matching circuit 263 may include, for example, a capacitor C9 and a capacitor C10. The capacitor C9 is connected in series between the first non-near field communication chip 241 and the first antenna 22, for example, between the third filter circuit 253 and the first antenna 22, and the capacitor C10 is connected between the capacitor C9 and the first antenna 22, and the capacitor C10 is grounded.

[0085] The fourth matching circuit 264 may include, for example, a capacitor C11 and a capacitor C12. The capacitor C11 is connected in series between the second non-near field communication chip 242 and the second antenna 23, for example, between the fourth filter circuit 254 and the second antenna 23, and the capacitor C12 is connected between the capacitor C11 and the second antenna 23, and the capacitor C12 is grounded.

[0086] It can be understood that the inductance values ​​of the inductors L1 to L4 and the capacitance values ​​of the capacitors C1 to C12 can be set according to actual needs.

[0087] In some embodiments, reference Figure 7 , Figure 7 This is a sixth structural schematic diagram of the antenna device 200 provided in an embodiment of the present application.

[0088] The first differential signal terminal 211 of the NFC chip 21 may include a first transmitting terminal 211a and a first receiving terminal 211b, and the second differential signal terminal 212 may include a second transmitting terminal 212a and a second receiving terminal 212b. The first transmitting terminal 211a and the second transmitting terminal 212a may be used to output differential signals. The first receiving terminal 211b and the second receiving terminal 212b may be used to receive differential signals input from the outside.

[0089] The inductor L1 is connected in series between the first transmitting terminal 211a and the first antenna 22. The first filtering circuit 251 may further include a resistor R1 and a capacitor C13, which are arranged in series between the first receiving terminal 211b and the first matching circuit 261. The first matching circuit 261 may further include a resistor R2, which is connected in series between the capacitor C5 and the first antenna 22.

[0090] The inductor L2 is connected in series between the second transmitting terminal 212a and the second antenna 23. The second filtering circuit 252 may further include a resistor R3 and a capacitor C14, which are arranged in series between the second receiving terminal 212b and the second matching circuit 262. The second matching circuit 262 may further include a resistor R4, which is connected in series between the capacitor C7 and the second antenna 23.

[0091] In some embodiments, reference Figure 8 , Figure 8 A second structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0092] The electronic device 100 includes a first flexible printed circuit (FPC) 51 and a second flexible printed circuit 52. The first flexible printed circuit 51 and the second flexible printed circuit 52 can both be used to transmit current. The first flexible printed circuit 51 and the second flexible printed circuit 52 can both be connected to the circuit board 30 of the electronic device 100.

[0093] The first antenna 22 includes the first flexible circuit board 51 , that is, the first antenna 22 can be formed by the first flexible circuit board 51 .

[0094] The second antenna 23 includes the second flexible circuit board 52 , that is, the second antenna 23 may be formed by the second flexible circuit board 52 .

[0095] In some embodiments, the electronic device 100 further includes a first radiation field enhancer 53 and a second radiation field enhancer 54. The material of the first radiation field enhancer 53 and the second radiation field enhancer 54 may include an insulating material, for example, a ferrite layer. The ferrite layer is formed of a ferrite material, and the ferrite material may be a nickel-copper-zinc system material having a specified content of iron oxide, copper oxide, zinc oxide, and nickel oxide. In addition, the ferrite material may also include some auxiliary materials, such as a specified content of bismuth oxide, silicon oxide, magnesium oxide, cobalt oxide and other materials. Among them, the first radiation field enhancer 53 and the second radiation field enhancer 54 can be used to enhance the intensity of the electromagnetic field.

[0096] The first radiation field enhancer 53 is disposed on one side of the first flexible circuit board 51. The first radiation field enhancer 53 is used to enhance the radiation field strength when the first antenna 22 radiates the NFC signal, thereby improving the NFC signal strength of the first antenna 22.

[0097] The second radiation field enhancer 54 is disposed on one side of the second flexible circuit board 52. The second radiation field enhancer 54 is used to enhance the radiation field strength when the second antenna 23 radiates the NFC signal, thereby improving the NFC signal strength of the second antenna 23.

[0098] In some embodiments, reference Fig. 9 , Fig. 9 A third structural schematic diagram of the electronic device 100 provided in an embodiment of the present application.

[0099] A first printed circuit 31 and a second printed circuit 32 are arranged on the circuit board 30 of the electronic device 100 at intervals. The shapes of the first printed circuit 31 and the second printed circuit 32 can be straight, spiral, ring, irregular, etc. The first printed circuit 31 and the second printed circuit 32 can both be used to transmit current. Among them, the first antenna 22 includes the first printed circuit 31, and the second antenna 23 includes the second printed circuit 32. That is, the first antenna 22 can be formed by the first printed circuit 31, and the second antenna 23 can be formed by the second printed circuit 32.

[0100] Therefore, there is no need to separately provide the first antenna 22 and the second antenna 23 on the electronic device 100 , and the first antenna 22 and the second antenna 23 can be formed by printed circuits on the circuit board 30 , thereby simplifying the design of the antenna.

[0101] In some embodiments, reference Fig.10 , Fig.10 This is a fourth structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0102] The electronic device 100 includes a metal frame 60. The metal frame 60 may be a part of the housing 20. The metal frame 60 may be, for example, an aluminum alloy frame, a magnesium alloy frame, etc. The metal frame 60 may be arranged around the periphery of the middle frame of the electronic device 100.

[0103] The metal frame 60 is provided with a first metal branch 61 and a second metal branch 62. For example, a slit 63 and a slit 64 may be provided at one end of the metal frame 60, and the first metal branch 61 is formed by the slit 63 and the slit 64; a slit 65 and a slit 66 may be provided at the other end of the metal frame 60, and the second metal branch 62 is formed by the slit 65 and the slit 66.

[0104] The first antenna 22 includes the first metal branch 61 , and the second antenna 23 includes the second metal branch 62 . That is, the first antenna 22 may be formed by the first metal branch 61 , and the second antenna 23 may be formed by the second metal branch 62 .

[0105] Therefore, there is no need to separately provide the first antenna 22 and the second antenna 23 on the electronic device 100 , and the first antenna 22 and the second antenna 23 can be formed by the metal frame 60 , thereby simplifying the design of the antenna.

[0106] In some embodiments, reference Fig.11 , Fig.11This is a fifth structural diagram of the electronic device 100 provided in an embodiment of the present application.

[0107] The electronic device 100 includes a battery cover 70. The battery cover 70 can be a part of the housing 20. The battery cover 70 can be made of, for example, aluminum alloy, magnesium alloy, etc. The battery cover 70 covers the battery 40 of the electronic device 100.

[0108] The battery cover 70 is provided with a third metal branch 71 and a fourth metal branch 72. For example, two U-shaped gaps may be provided on the battery cover 70, one U-shaped gap forming the third metal branch 71, and the other U-shaped gap forming the fourth metal branch 72. For another example, an E-shaped gap may be provided on the battery cover 70, and the third metal branch 71 and the fourth metal branch 72 may be formed through the E-shaped gap.

[0109] The first antenna 22 includes the third metal branch 71 , and the second antenna 23 includes the fourth metal branch 72 . That is, the first antenna 22 may be formed by the third metal branch 71 , and the second antenna 23 may be formed by the fourth metal branch 72 .

[0110] Therefore, there is no need to separately provide the first antenna 22 and the second antenna 23 on the electronic device 100 , and the first antenna 22 and the second antenna 23 can be formed by the battery cover 70 , so the design of the antenna can be simplified.

[0111] 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: include: A near field communication chip, comprising 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 a differential excitation current; a first antenna, electrically connected to the first differential signal end, the first antenna being used to transmit the differential excitation current and radiate a near field communication signal at a first near field communication resonant frequency, and generating a first near field communication radiation field when the first antenna transmits the differential excitation current; A first matching circuit is provided between the first antenna and the first differential signal terminal, and the first matching circuit is used to match the impedance of the first antenna when transmitting the differential excitation current; a second antenna, electrically connected to the second differential signal end, the second antenna being used to transmit the differential excitation current and radiate a near field communication signal at a second near field communication resonant frequency, and generating a second near field communication radiation field when the second antenna transmits the differential excitation current; A second matching circuit is provided between the second antenna and the second differential signal end, and the second matching circuit is used for matching the impedance of the second antenna when transmitting the differential excitation current; Among them, the impedance of the first antenna is different from that of the second antenna, the impedance of the first matching circuit is different from that of the second matching circuit, the first near-field communication resonant frequency is different from that of the second near-field communication resonant frequency, and the first near-field communication radiation field and the second near-field communication radiation field do not overlap with each other.

2. The antenna device according to claim 1, characterized in that Also includes: A first non-near field communication chip, configured to provide a first non-near field communication excitation current; The first antenna is also electrically connected to the first non-near field communication chip, and the first antenna is also used to transmit the first non-near field communication excitation current.

3. The antenna device according to claim 2, characterized in that: The first antenna includes a first feeding end, a second feeding end and a first grounding end, the first feeding end is electrically connected to the first differential signal end, the second feeding end is electrically connected to the first non-near field communication chip, and the first grounding end is grounded.

4. The antenna device according to claim 3, characterized in that: The first feeding end coincides with the second feeding end.

5. The antenna device according to claim 2, characterized in that: Also includes: The third matching circuit is arranged between the first antenna and the first non-near field communication chip, and the third matching circuit is used to match the impedance of the first antenna when transmitting the first non-near field communication excitation current.

6. The antenna device according to claim 1, characterized in that: Also includes: A second non-near field communication chip, used for providing a second non-near field communication excitation current; The second antenna is also electrically connected to the second non-near field communication chip, and the second antenna is also used to transmit the second non-near field communication excitation current.

7. The antenna device according to claim 6, characterized in that: The second antenna includes a third feeding terminal, a fourth feeding terminal and a second grounding terminal, the third feeding terminal is electrically connected to the second differential signal terminal, the fourth feeding terminal is electrically connected to the second non-near field communication chip, and the second grounding terminal is grounded.

8. The antenna device according to claim 7, characterized in that: The third feeding terminal coincides with the fourth feeding terminal.

9. The antenna device according to claim 6, characterized in that: Also includes: A fourth matching circuit is provided between the second antenna and the second non-near field communication chip, and the fourth matching circuit is used to match the impedance of the second antenna when transmitting the second non-near field communication excitation current.

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

11. The electronic device according to claim 10, characterized in that: The first antenna includes a first flexible circuit board.

12. The electronic device according to claim 11, characterized in that: Also includes: The first radiation field enhancer is arranged on one side of the first flexible circuit board, and is used to enhance the radiation field strength when the first antenna radiates a near field communication signal.

13. The electronic device according to claim 10, characterized in that: The second antenna includes a second flexible circuit board.

14. The electronic device according to claim 13, characterized in that: Also includes: The second radiation field enhancer is arranged on one side of the second flexible circuit board, and the second radiation field enhancer is used to enhance the radiation field strength when the second antenna radiates a near field communication signal.

15. The electronic device according to claim 10, characterized in that: Also includes: A circuit board, on which a first printed circuit and a second printed circuit are arranged at intervals; The first antenna includes the first printed circuit; The second antenna includes the second printed circuit.

16. The electronic device according to claim 10, characterized in that: Also includes: A metal frame, on which a first metal branch and a second metal branch are formed at intervals, the first antenna includes the first metal branch, and the second antenna includes the second metal branch.

17. The electronic device according to claim 10, characterized in that: Also includes: A battery cover, wherein a third metal branch and a fourth metal branch are formed at intervals on the battery cover, the first antenna includes the third metal branch, and the second antenna includes the fourth metal branch.

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