CN113964551A

CN113964551A - Antenna device and electronic apparatus

Info

Publication number: CN113964551A
Application number: CN202010707001.5A
Authority: CN
Inventors: 黄武鑫; 李偲; 张盛强
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2022-01-21

Abstract

The embodiment of the application provides an antenna device and electronic equipment, the antenna device includes: the near field communication chip is used for providing differential excitation current; a first antenna to transmit the differential excitation current and to radiate a near field communication signal at a first near field communication resonant frequency; a second antenna to transmit the differential excitation current and to radiate 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, because 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 multiband near field communication, thereby improving the communication adaptability of the electronic device.

Description

Antenna device and electronic apparatus

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an antenna device and an electronic device.

Background

With the development of communication technology, electronic devices such as smart phones have more and more functions, and communication modes of the electronic devices are more diversified. For example, Near Field Communication (NFC) is increasingly available for electronic devices recently.

However, generally, the electronic device can only support near field communication in a single frequency band, and cannot meet application requirements.

Disclosure of Invention

The embodiment of the application provides an antenna device and electronic equipment, which can enable the electronic equipment to support multi-band near field communication, so that the communication adaptability of the electronic equipment is improved.

An embodiment of the present application provides an antenna apparatus, including:

the near field communication chip comprises a first differential signal end and a second differential signal end, wherein the first differential signal end and the second differential signal end are used for providing differential excitation current;

a first antenna electrically connected to the first differential signal terminal, the first antenna configured to transmit the differential excitation current and radiate a near field communication signal at a first near field communication resonant frequency;

a second antenna electrically connected to the second differential signal terminal, the second antenna configured to transmit the differential excitation current and radiate a near field communication signal at a second near field communication resonant frequency; wherein

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

The embodiment of the application further provides an electronic device, which comprises an antenna device, wherein the antenna device is the antenna device.

In the electronic device provided by the embodiment of the application, 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 work in different frequency bands, so that the electronic device can support multiband near field communication, and the communication adaptability of the electronic device is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

Fig. 1 is a first structural schematic diagram of an electronic device according to an embodiment of the present application.

Fig. 2 is a schematic view of a first structure of an antenna device according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a second structure of an antenna device according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a third antenna device according to an embodiment of the present application.

Fig. 5 is a schematic diagram of a fourth structure of an antenna apparatus according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a fifth antenna device according to an embodiment of the present application.

Fig. 7 is a schematic diagram of a sixth structure of an antenna apparatus according to an embodiment of the present application.

Fig. 8 is a schematic structural diagram of a second electronic device according to an embodiment of the present application.

Fig. 9 is a third schematic structural diagram of an electronic device according to an embodiment of the present application.

Fig. 10 is a fourth structural schematic diagram of an electronic device according to an embodiment of the present application.

Fig. 11 is a fifth structural schematic diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the application provides electronic equipment. The electronic device may be a smart phone, a tablet computer, or other devices, and may also be a game device, an AR (Augmented Reality) device, an automobile device, a data storage device, an audio playing device, a video playing device, a notebook computer, a desktop computing device, or other devices.

Referring to fig. 1, fig. 1 is a schematic view of a first structure of an electronic device 100 according to an embodiment of the present disclosure.

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

The display screen 10 is disposed on the casing 20 to form a display surface of the electronic device 100 for displaying images, texts, and other information. The Display screen 10 may include a Liquid Crystal Display (LCD) or an Organic Light-Emitting Diode (OLED) Display screen.

The housing 20 is used to form an outer contour of the electronic apparatus 100 so as to accommodate electronic devices, functional components, and the like of the electronic apparatus 100, while forming a sealing and protecting function for the electronic devices and functional components inside the electronic apparatus. For example, the camera, the circuit board, and the vibration motor of the electronic device 100 may be disposed inside the housing 20.

A circuit board 30 is disposed inside the housing 20. The circuit board 30 may be a main board of the electronic device 100. One or more of a processor, a camera, an earphone interface, an acceleration sensor, a gyroscope, a motor, and other functional components may also be integrated on the circuit board 30. Meanwhile, the display screen 10 may be electrically connected to the circuit board 30 to control the display of the display screen 10 by a processor on the circuit board 30.

The battery 40 is disposed inside the case 20. Meanwhile, the battery 40 is electrically connected to the circuit board 30 to enable the battery 40 to supply power to the electronic device 100. The circuit board 30 may be provided thereon with a power management circuit. The power management circuit is used to distribute the voltage provided by the battery 40 to the various electronic devices in the electronic apparatus 100.

The electronic device 100 is further provided with an antenna device 200. The antenna apparatus 200 is used for implementing a wireless Communication function of the electronic device 100, for example, the antenna apparatus 200 may be used for implementing a Near Field Communication (NFC) function. The antenna device 200 is disposed inside the housing 20 of the electronic apparatus 100. It is understood that some components of the antenna device 200 may 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 may be integrated on the circuit board 30. In addition, some components of the antenna device 200 may be disposed directly inside the housing 20. For example, the antenna of the antenna device 200 may be disposed directly inside the housing 20.

Referring to fig. 2, fig. 2 is a schematic diagram of a first structure of an antenna apparatus 200 according to an embodiment of the present disclosure. The antenna device 200 includes a near field communication chip 21, a first antenna 22, and a second antenna 23.

In the description of the present application, it is to be understood that terms such as "first", "second", and the like are used merely to distinguish one similar element from another, and are not to be construed as indicating or implying relative importance or implying any indication of the number of technical features indicated.

The near field communication chip (NFC chip) 21 is used to provide a differential excitation current. The differential excitation current can comprise 2 paths of differential signals, and the 2 paths of differential signals can be output as 2 independent signals and respectively provided with independent matching circuits for matching. Wherein the 2-way differential signal comprises two current signals. The two current signals are identical in amplitude and opposite in phase, or are understood to be 180 degrees out of phase. In addition, the 2 paths of differential signals are balanced signals. It can be understood that the analog signal is an unbalanced signal if directly transmitted during the transmission process; if the original analog signal is inverted and then the inverted analog signal and the original analog signal are transmitted simultaneously, the inverted analog signal and the original analog signal are called balanced signals.

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 for providing the differential excitation current. For example, the first differential signal terminal 211 may be used to provide 1 differential signal in the differential driving current, and the second differential signal terminal 212 may be used to provide another 1 differential signal in the differential driving current.

It is understood that the NFC chip 21 may be disposed on the circuit board 30 of the electronic device 100, or a smaller separate circuit board may be disposed in the electronic device 100, and the NFC chip 21 is integrated on the separate circuit board. The separate circuit board may be, for example, a small board in the electronic device 100.

The first antenna 22 and the second antenna 23 are both electrically connected to the NFC chip 21. For example, the first antenna 22 may be electrically connected to the first differential signal terminal 211 of the NFC chip 21, and the second antenna 23 may 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 may form a signal loop.

The first antenna 22 is configured to transmit the differential excitation current, for example, 1 differential signal in the differential excitation current, and radiate a near field communication signal (NFC signal) at a first near field communication resonant frequency (NFC resonant frequency). Thus, the first antenna 22 may enable near field communication of the electronic device 100 with other electronic devices at the first NFC resonant frequency.

The second antenna 23 is configured to transmit the differential excitation current, for example, another 1 differential signal in the differential excitation current, and radiate an NFC signal at a second NFC resonant frequency. Thus, the second antenna 23 may enable near field communication of the electronic device 100 with other electronic devices at the second NFC resonance frequency.

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

It is understood that the characteristics of the first antenna 22 and the second antenna 23 may be different, for example, the shape, size, material, etc. may be different, so that the impedances of the first antenna 22 and the second antenna 23 may be different. Therefore, the first antenna 22 and the second antenna 23 may generate different resonant frequencies when transmitting the differential excitation current.

In practical applications, communication frequencies may be different among different electronic devices in the process of implementing near field communication. For example, the NFC communication frequency of the subway swipe card reader may be 13.56MHz, while the NFC communication frequency of a part of the access control system may be 100KHz, while the NFC communication frequency of a part of the devices supporting the NFC function may be as high as 2.4 GHz. In a conventional electronic device, an NFC antenna can only operate in a frequency band of 13.56MHz, and thus cannot meet application requirements of multiple scenarios. For example, in a conventional electronic device, when an NFC antenna operates at 13.56MHz, a subway card swiping of 13.56MHz can be realized through an NFC function, but a 100KHz access control system cannot be opened.

In the electronic device 100 provided in the embodiment of the present application, because 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 multiband near field communication, so that the communication adaptability of the electronic device 100 is improved. For example, the electronic device 100 may support near field communication of 13.56MHz and 100KHz at the same time, and then the electronic device 100 may not only realize subway card swiping of 13.56MHz through the NFC function, but also open an access control system of 100KHz, thereby expanding the application range of the electronic device 100 in life.

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 radiated field may cover an 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 radiated field may also cover an area of space around the electronic device 100. Wherein the first NFC radiating field and the second NFC radiating field are not overlapped with each other. Accordingly, the first antenna 22 operating at the first resonance frequency and the second antenna 23 operating at the second resonance frequency can be prevented from interfering with each other, and thus, the operation stability of the first antenna 22 and the second antenna 23 can be improved.

For example, the first antenna 22 may be disposed at one end of the electronic device 100, for example, the top end, and the second antenna 23 may be disposed at the other end of the electronic device 100, for example, 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.

In some embodiments, referring to fig. 3, fig. 3 is a schematic diagram of a second structure of an antenna apparatus 200 according to an embodiment of the present disclosure.

Wherein the antenna arrangement 200 further comprises a first non-near-field communication chip 241. It is understood that the first non-near-field communication chip 241 may be integrated on the circuit board 30 of the electronic device 100.

The first non-near-field communication chip 241 is used to provide a first non-near-field communication excitation current. Wherein 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 signals; 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.

Wherein the first antenna 22 is further electrically connected with the first non-near-field communication chip 241. The first antenna 22 may also be used to transmit the first non-near-field communication excitation current. Accordingly, the first antenna 22 may radiate a wireless signal corresponding to the first non-near-field communication excitation current to the outside, so as to implement a corresponding wireless communication function, such as a cellular communication function, a Wi-Fi communication function, a GPS communication function, a BT communication function, and the like.

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

The first feeding end 221 and the second feeding end 222 may be spaced apart from each other, for example, a distance between the first feeding end 221 and the first grounding end 223 may be greater than a distance between the second feeding end 222 and the first grounding end 223.

In some embodiments, the first feeding end 221 and the second feeding end 222 may coincide. 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 disposed on the first antenna 22, thereby simplifying the disposition of the first antenna 22.

It is understood that the first antenna 22 may be used to transmit the differential excitation current provided by the NFC chip 21 and the first non-near-field communication excitation current provided by the first non-near-field communication chip 241, so that multiplexing of the first antenna 22 may be achieved. Therefore, the number of antennas of the electronic apparatus 100 can be reduced, thereby saving the internal layout space of the electronic apparatus 100.

In some embodiments, referring to fig. 4, fig. 4 is a schematic structural diagram of a third antenna device 200 according to an embodiment of the present disclosure.

Wherein the antenna device 200 further comprises a second non-near-field communication chip 242. It is understood that the second non-near-field communication chip 242 may also be integrated on the circuit board 30 of the electronic device 100.

The second non-near-field communication chip 242 is configured to provide a second non-near-field communication excitation current. Wherein 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, 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, or the like.

Wherein the second antenna 23 is further electrically connected to the second non-near-field communication chip 242. The second antenna 23 is also used for transmitting the second non-near-field communication excitation current. Therefore, the second antenna 23 may radiate a wireless signal corresponding to the second non-near-field communication excitation current to the outside, so as to implement a corresponding wireless communication function, such as a cellular communication function, a Wi-Fi communication function, a GPS communication function, a BT communication function, and the like.

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

The third feeding end 231 and the fourth feeding end 232 may be spaced apart from each other, for example, a distance between the third feeding end 231 and the second grounding end 233 may be greater than a distance between the fourth feeding end 232 and the second grounding end 233.

In some embodiments, the third feeding end 231 and the fourth feeding end 232 may coincide. 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. So as to reduce the number of feeding terminals arranged on the second antenna 23, thereby simplifying the arrangement of the second antenna 23.

It is understood that the second antenna 23 may be used to transmit the differential excitation current provided by the NFC chip 21 and the second non-near-field communication excitation current provided by the second non-near-field communication chip 242, so that multiplexing of the second antenna 23 may be achieved. Therefore, the number of antennas of the electronic apparatus 100 can be reduced, thereby saving the internal layout space of the electronic apparatus 100.

In addition, it is understood that, in some embodiments, the antenna apparatus 200 may further include the first non-near-field communication chip 241 and the second non-near-field communication chip 242 at the same time, which is not described herein again.

In some embodiments, referring to fig. 5, fig. 5 is a schematic diagram of a fourth structure of an antenna apparatus 200 according to an embodiment of the present disclosure.

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 will be appreciated that the filter circuit may also be referred to as a filter network and the matching circuit may also be referred to as a matching network, a tuning circuit, a tuning network, etc.

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 for filtering 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.

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 configured to filter 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.

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 for filtering 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.

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 configured 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.

It is understood that the first filter circuit 251, the second filter circuit 252, the third filter circuit 253, and the fourth filter circuit 254 may all include a circuit formed by a series connection or a parallel connection of capacitors and inductors.

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 configured to match an impedance when the first antenna 22 transmits the differential excitation current provided by the NFC chip 21, for example, an impedance when the first antenna 22 transmits the differential signal provided by the first differential signal terminal 211.

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 configured to match an impedance of the second antenna 23 when transmitting the differential excitation current provided by the NFC chip 21, for example, match an impedance of the second antenna 23 when transmitting the differential signal provided by the second differential signal terminal 212.

Wherein 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 resonant frequencies when transmitting the differential excitation current provided by the NFC chip 21.

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.

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 filtering circuit 254. The fourth matching circuit 264 is configured to match an impedance of the second antenna 23 when transmitting the second non-near-field communication excitation current.

It is understood that the first matching circuit 261, the second matching circuit 262, the third matching circuit 263 and the fourth matching circuit 264 may all include a circuit formed by a series connection or a parallel connection of capacitors and inductors.

In some embodiments, referring to fig. 6, fig. 6 is a schematic diagram illustrating a fifth structure of an antenna apparatus 200 according to an embodiment of the present disclosure.

The first filter circuit 251 may include, for example, an inductor L1 and a capacitor C1. Wherein an inductor L1 is connected in series between the first differential signal terminal 211 and the first antenna 22, a capacitor C1 is connected between the inductor L1 and the first antenna 22, and a capacitor C1 is connected to ground.

The second filter circuit 252 may include, for example, an inductor L2 and a capacitor C2. Wherein an inductor L2 is connected in series between the second differential signal terminal 212 and the second antenna 23, a capacitor C2 is connected between the inductor L2 and the second antenna 23, and a capacitor C2 is connected to ground.

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

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

The first matching circuit 261 may include, for example, a capacitor C5 and a capacitor C6. A capacitor C5 is connected in series between the first differential signal terminal 211 and the first antenna 22, e.g., between the first filter circuit 251 and the first antenna 22, a capacitor C6 is connected between a capacitor C5 and the first antenna 22, and a capacitor C6 is connected to ground. It is understood that the capacitance C5 and the capacitance C6 may be plural.

The second matching circuit 262 may include, for example, a capacitor C7 and a capacitor C8. A 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, a capacitor C8 is connected between a capacitor C7 and the second antenna 23, and a capacitor C8 is connected to ground. It is understood that the capacitance C7 and the capacitance C8 may be plural.

The third matching circuit 263 may include, for example, a capacitor C9 and a capacitor C10. A capacitance 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, a capacitance C10 is connected between a capacitance C9 and the first antenna 22, and a capacitance C10 is connected to ground.

The fourth matching circuit 264 may include, for example, a capacitor C11 and a capacitor C12. A capacitance 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, a capacitance C12 is connected between a capacitance C11 and the second antenna 23, and a capacitance C12 is connected to ground.

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.

In some embodiments, referring to fig. 7, fig. 7 is a schematic diagram illustrating a sixth structure of an antenna apparatus 200 according to an embodiment of the present application.

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 212 b. The first transmitting terminal 211a and the second transmitting terminal 212a may be configured to output differential signals. The first receiving end 211b and the second receiving end 212b may be configured to receive differential signals input from the outside.

The inductor L1 is connected in series between the first transmitting terminal 211a and the first antenna 22. The first filter circuit 251 may further include a resistor R1 and a capacitor C13, wherein the resistor R1 and the capacitor C13 are serially disposed between the first receiving terminal 211b and the first matching circuit 261. The first matching circuit 261 may further include a resistor R2, and a resistor R2 is connected in series between the capacitor C5 and the first antenna 22.

The inductor L2 is connected in series between the second transmitting terminal 212a and the second antenna 23. The second filter circuit 252 may further include a resistor R3 and a capacitor C14, wherein the resistor R3 and the capacitor C14 are serially connected between the second receiving terminal 212b and the second matching circuit 262. The second matching circuit 262 may further include a resistor R4, the resistor R4 being connected in series between the capacitor C7 and the second antenna 23.

In some embodiments, referring to fig. 8, fig. 8 is a schematic diagram of a second structure of the electronic device 100 according to an embodiment of the present disclosure.

The electronic apparatus 100 includes a first Flexible Circuit board (FPC) 51 and a second Flexible Circuit board 52. Both the first flexible circuit board 51 and the second flexible circuit board 52 may be used to transmit electric current. Both the first flexible circuit board 51 and the second flexible circuit board 52 may be connected to the circuit board 30 of the electronic device 100.

The first antenna 22 includes the first flexible circuit board 51, that is, the first antenna 22 may be formed by the first flexible circuit board 51.

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.

In some embodiments, the electronic device 100 further comprises a first radiation field enhancement member 53 and a second radiation field enhancement member 54. The material of the first radiation field enhancement member 53 and the second radiation field enhancement member 54 may include an insulating material, and may include a ferrite layer, for example. The ferrite layer is formed of a ferrite material, and the ferrite material may be a nickel-copper-zinc-based material having a predetermined content of iron oxide, copper oxide, zinc oxide, and nickel oxide. In addition, the ferrite material may further include auxiliary materials such as bismuth oxide, silicon oxide, magnesium oxide, cobalt oxide, etc. in a predetermined amount. Wherein the first radiation field enhancer 53 and the second radiation field enhancer 54 can be used to enhance the strength of the electromagnetic field.

Wherein the first radiation field enhancement member 53 is disposed on the first flexible circuit board 51 side. The first radiation field enhancement member 53 is configured to enhance the radiation field strength when the first antenna 22 radiates the NFC signal, so that the NFC signal strength of the first antenna 22 can be improved.

The second radiation field enhancement member 54 is disposed on the second flexible circuit board 52 side. The second radiation field enhancement member 54 is used for enhancing the radiation field strength when the second antenna 23 radiates the NFC signal, so that the NFC signal strength of the second antenna 23 can be improved.

In some embodiments, referring to fig. 9, fig. 9 is a schematic structural diagram of a third electronic device 100 provided in the embodiments of the present application.

The circuit board 30 of the electronic device 100 is provided with a first printed circuit 31 and a second printed circuit 32 at intervals. The shapes of the first printed wiring 31 and the second printed wiring 32 may be linear, spiral, annular, irregular, and the like. Both the first printed wire 31 and the second printed wire 32 may be used for transmitting electric current. Wherein the first antenna 22 comprises the first printed wiring 31 and the second antenna 23 comprises the second printed wiring 32. That is, the first antenna 22 may be formed by the first printed wiring 31, and the second antenna 23 may be formed by the second printed wiring 32.

Thus, the first antenna 22 and the second antenna 23 can be formed by printed wiring on the circuit board 30 without separately providing the first antenna 22 and the second antenna 23 on the electronic device 100, and thus the design of the antenna can be simplified.

In some embodiments, referring to fig. 10, fig. 10 is a fourth structural diagram of an electronic device 100 provided in the embodiments of the present application.

The electronic device 100 includes a metal bezel 60. The metal bezel 60 may be formed as part of the housing 20. The metal frame 60 may be, for example, an aluminum alloy frame, a magnesium alloy frame, or the like. The metal bezel 60 may surround the periphery of the middle frame of the electronic device 100.

A first metal branch 61 and a second metal branch 62 are formed on the metal frame 60 at intervals. For example, a slit 63 and a slit 64 may be formed at one end of the metal frame 60, and the first metal branch 61 may be formed by the slit 63 and the slit 64; a slit 65 and a slit 66 are formed 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.

Wherein the first antenna 22 comprises the first metal branch 61, and the second antenna 23 comprises 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.

Therefore, the first antenna 22 and the second antenna 23 do not need to be separately arranged on the electronic device 100, and the first antenna 22 and the second antenna 23 can be formed through the metal frame 60, so that the design of the antenna can be simplified.

In some embodiments, referring to fig. 11, fig. 11 is a schematic diagram of a fifth structure of an electronic device 100 according to an embodiment of the present disclosure.

The electronic device 100 includes a battery cover 70. The battery cover 70 may be included as part of the housing 20. The battery cover 70 may be made of, for example, an aluminum alloy, a magnesium alloy, or the like. The battery cover 70 covers the battery 40 of the electronic device 100.

The battery cover 70 is formed with a third metal branch 71 and a fourth metal branch 72 at an interval. For example, 2U-shaped slits may be formed in the battery cover 70, one U-shaped slit forming the third metal branch 71, and the other U-shaped slit forming the fourth metal branch 72. For another example, an E-shaped gap may be formed in the battery cover 70, and the third metal branch 71 and the fourth metal branch 72 may be formed through the E-shaped gap.

Wherein 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.

Accordingly, the first antenna 22 and the second antenna 23 can be formed by the battery cover 70 without separately providing the first antenna 22 and the second antenna 23 on the electronic device 100, and thus the design of the antenna can be simplified.

The antenna device and the electronic device provided in the embodiments of the present application are described in detail above. The principles and implementations of the present application are described herein using specific examples, which are presented only to aid in understanding the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. An antenna device, comprising:

2. The antenna device of claim 1, further comprising:

a first matching circuit disposed between the first antenna and the first differential signal terminal, the first matching circuit being configured to match an impedance of the first antenna when the differential excitation current is transmitted;

the second matching circuit is arranged between the second antenna and the second differential signal end and is used for matching the impedance of the second antenna when the differential excitation current is transmitted; wherein

The impedance of the first matching circuit is different from the impedance of the second matching circuit.

3. The antenna device of claim 1, wherein:

generating a first near field communication radiation field when the first antenna transmits the differential excitation current;

generating a second near field communication radiation field when the second antenna transmits the differential excitation current;

the first near field communication radiation field and the second near field communication radiation field are not overlapped with each other.

4. The antenna device according to any one of claims 1 to 3, further comprising:

a first non-near-field communication chip for providing a first non-near-field communication excitation current;

the first antenna is also electrically connected with the first non-near-field communication chip, and the first antenna is also used for transmitting the first non-near-field communication excitation current.

5. The antenna device of claim 4, wherein:

the first antenna comprises a first feed end, a second feed end and a first grounding end, the first feed end is electrically connected with the first differential signal end, the second feed end is electrically connected with the first non-near-field communication chip, and the first grounding end is grounded.

6. An antenna arrangement according to claim 5, characterized in that the first feeding end coincides with the second feeding end.

7. The antenna device of claim 4, further comprising:

a third matching circuit disposed between the first antenna and the first non-near-field communication chip, the third matching circuit configured to match an impedance of the first antenna when the first antenna transmits the first non-near-field communication excitation current.

8. The antenna device according to any one of claims 1 to 3, further comprising:

a second non-near-field communication chip for providing a second non-near-field communication excitation current;

the second antenna is also electrically connected with the second non-near-field communication chip and is also used for transmitting the second non-near-field communication excitation current.

9. The antenna device of claim 8, wherein:

the second antenna comprises a third feed end, a fourth feed end and a second grounding end, the third feed end is electrically connected with the second differential signal end, the fourth feed end is electrically connected with the second non-near-field communication chip, and the second grounding end is grounded.

10. An antenna arrangement according to claim 9, characterized in that the third feeding end coincides with the fourth feeding end.

11. The antenna device of claim 8, further comprising:

and the fourth matching circuit is arranged between the second antenna and the second non-near-field communication chip and is used for matching the impedance of the second antenna when the second antenna transmits the second non-near-field communication excitation current.

12. An electronic device, characterized in that it comprises an antenna device according to any one of claims 1 to 11.

13. The electronic device of claim 12, wherein the first antenna comprises a first flexible circuit board.

14. The electronic device of claim 13, further comprising:

the first radiation field enhancement body is arranged on one side of the first flexible circuit board and used for enhancing the radiation field intensity when the first antenna radiates near field communication signals.

15. The electronic device of claim 12, wherein the second antenna comprises a second flexible circuit board.

16. The electronic device of claim 15, further comprising:

and the second radiation field enhancement body is arranged on one side of the second flexible circuit board and is used for enhancing the radiation field intensity when the second antenna radiates the near field communication signal.

17. The electronic device of claim 12, further comprising:

the circuit board is provided with a first printed circuit and a second printed circuit at intervals;

the first antenna comprises the first printed wiring;

the second antenna includes the second printed wiring.

18. The electronic device of claim 12, further comprising:

the antenna comprises a metal frame, wherein a first metal branch and a second metal branch are formed on the metal frame at intervals, the first antenna comprises the first metal branch, and the second antenna comprises the second metal branch.

19. The electronic device of claim 12, further comprising:

the antenna comprises a battery cover, wherein a third metal branch and a fourth metal branch are formed on the battery cover at intervals, the first antenna comprises the third metal branch, and the second antenna comprises the fourth metal branch.