CN211266909U - Antenna device and electronic apparatus - Google Patents
Antenna device and electronic apparatus Download PDFInfo
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- CN211266909U CN211266909U CN202020484812.9U CN202020484812U CN211266909U CN 211266909 U CN211266909 U CN 211266909U CN 202020484812 U CN202020484812 U CN 202020484812U CN 211266909 U CN211266909 U CN 211266909U
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Abstract
The embodiment of the application provides an antenna device and electronic equipment, the antenna device includes: the near field communication chip comprises a first differential signal end and a second differential signal end, wherein the first differential signal end is used for outputting a first differential signal, and the second differential signal end is used for outputting a second differential signal; the phase shift circuit is used for adjusting the phase of the second differential signal to obtain an adjusted second differential signal; and the antenna is used for transmitting a mixed signal of the first differential signal and the adjusted second differential signal. In the antenna device, the phase of the second differential signal is adjusted through the phase shift circuit, the antenna can transmit a mixed signal of the first differential signal and the adjusted second differential signal, the two paths of differential signals output by the NFC chip can be transmitted through one antenna, and the two paths of differential signals do not need to be subjected to balance-unbalance conversion, so that the design of the NFC antenna can be simplified.
Description
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. Therefore, how to reasonably design the NFC antenna of the electronic device becomes a difficult problem.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides an antenna device and electronic equipment, which can simplify the design of an NFC antenna.
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 is used for outputting a first differential signal, and the second differential signal end is used for outputting a second differential signal;
the phase shift circuit is electrically connected with the second differential signal end and is used for adjusting the phase of the second differential signal to obtain an adjusted second differential signal;
and the antenna is electrically connected with the first differential signal end and the phase-shifting circuit and is used for transmitting a mixed signal of the first differential signal and the adjusted second differential signal.
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 antenna device provided by the embodiment of the application, since the phase of the second differential signal is adjusted by the phase shift circuit, the antenna can transmit a mixed signal of the first differential signal and the adjusted second differential signal, the two paths of differential signals output by the NFC chip can be transmitted by one antenna, and the two paths of differential signals do not need to be subjected to balance-unbalance conversion, so that the design of the NFC antenna can be simplified.
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 second electronic device according to an embodiment of the present application.
Fig. 7 is a third schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 8 is a fourth schematic structural diagram of an electronic device according to an embodiment of the present application.
Fig. 9 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.
It will be appreciated that a cover plate may also be provided over the display screen 10 to protect the display screen 10 from scratching or water damage. The cover plate may be a transparent glass cover plate, so that a user can observe contents displayed on the display screen 10 through the cover plate. For example, the cover plate may be a glass cover plate of sapphire material.
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. The housing 20 may include a middle frame and a battery cover.
The middle frame may have a thin plate-like or sheet-like structure, or may have a hollow frame structure. The middle frame is used for providing a supporting function for the electronic devices or functional components in the electronic device 100 so as to mount the electronic devices or functional components of the electronic device 100 together. For example, the middle frame may be provided with a groove, a protrusion, a through hole, and the like, so as to facilitate mounting of the electronic device or the functional component of the electronic apparatus 100. It is understood that the material of the middle frame may include metal or plastic.
The battery cover is connected with the middle frame. For example, the battery cover may be attached to the center frame by an adhesive such as a double-sided tape to achieve connection with the center frame. The battery cover is used for sealing the electronic devices and functional components of the electronic device 100 inside the electronic device 100 together with the middle frame and the display screen 10, so as to protect the electronic devices and functional components of the electronic device 100. It will be appreciated that the battery cover may be integrally formed. In the molding process of the battery cover, a post-camera mounting hole and other structures can be formed on the battery cover. It is understood that the material of the battery cover may also include metal or plastic.
A circuit board 30 is disposed inside the housing 20. For example, the circuit board 30 may be mounted on a middle frame of the case 20 to be fixed, and the circuit board 30 is sealed inside the electronic device by a battery cover. The circuit board 30 may be a main board of the electronic device 100. One or more of functional components such as a processor, a camera, an earphone interface, an acceleration sensor, a gyroscope, and a motor 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. For example, the battery 40 may be mounted on a middle frame of the case 20 to be fixed, and the battery 40 is sealed inside the electronic device by a battery cover. 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 device 200 is used for implementing a wireless communication function of the electronic device 100, for example, the antenna device 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. Wherein the antenna device 200 comprises: a near field communication chip (NFC chip) 21, a phase shift circuit 22, and an antenna 23.
The NFC chip 21 may be configured to output two paths of differential signals, where the two paths of differential signals may be output as 2 independent signals. The two 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 configured to output the two paths of differential signals. For example, the first differential signal terminal 211 may be used for outputting a first differential signal, and the second differential signal terminal 212 may be used for outputting a second differential signal.
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.
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 phase shift circuit 22 is electrically connected to the second differential signal terminal 212 of the NFC chip 21. The phase shift circuit 22 is configured to adjust a phase of the second differential signal output by the second differential signal terminal 212 to obtain an adjusted second differential signal, so that the phase of the adjusted second differential signal is the same as the phase of the first differential signal. The phase shift circuit 22 outputs the adjusted second differential signal after obtaining the adjusted second differential signal, so that the adjusted second differential signal is mixed with the first differential signal to obtain a mixed signal.
It is understood that, ideally, the first differential signal and the second differential signal have the same amplitude and opposite phase, or are understood to be 180 degrees out of phase with each other. Accordingly, the phase shift circuit 22 may be configured to adjust the phase of the second differential signal by 180 degrees such that the adjusted phase of the second differential signal is the same as the phase of the first differential signal.
In practical applications, however, due to the influence of environmental factors, such as differences or accuracies of electronic devices inside the NFC chip 21, the phases of the first differential signal and the second differential signal are not strictly different by 180 degrees, and may be different by 179 degrees or 181 degrees, for example. Therefore, the phase shift circuit 22 does not have to adjust the phase of the second differential signal by 180 degrees, and the adjusted phase of the second differential signal may be the same as the phase of the first differential signal.
The antenna 23 is electrically connected to the first differential signal terminal 211 of the NFC chip 21 and the phase shift circuit 22. The antenna 23 is configured to transmit a mixed signal of the first differential signal and the adjusted second differential signal, such as by radiating an electromagnetic wave to transmit the mixed signal to the outside, so as to implement near field communication between the electronic device 100 and another electronic device.
In the antenna device 200 provided in the embodiment of the present application, since the phase of the second differential signal is adjusted by the phase shift circuit 22, the antenna 23 may transmit a mixed signal of the first differential signal and the adjusted second differential signal, that is, the two paths of differential signals output by the NFC chip 21 may be transmitted by one antenna 23, and the two paths of differential signals do not need to undergo a balance-unbalance conversion, so that the design of the NFC antenna may be simplified.
Referring to fig. 3, fig. 3 is a schematic diagram of a second structure of an antenna device 200 according to an embodiment of the present application.
The phase shift circuit 22 may include a phase shifter 221. The phase adjustment of the second differential signal is achieved by the phase shifter 221.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a third antenna device 200 according to an embodiment of the present application.
Wherein the phase shift circuit 22 may include an inductor 222. The adjustment of the phase of the second differential signal is realized by the inductor 222.
In some embodiments, the phase shift circuit 22 may also include conductive paths. For example, the conductive paths may be metal traces such as on a printed circuit board, or metal traces on other dielectric substrates.
It will be appreciated that the phase shifting circuit 22 may also include a variety of phase shifters, inductors, and conductive paths. For example, the phase shift circuit 22 may include an inductor and a conductive path, which together enable the phase of the second differential signal to be adjusted.
Referring to fig. 5, fig. 5 is a schematic diagram illustrating a fourth structure of the antenna device 200 according to the embodiment of the present application. The antenna device 200 further includes a filter network 24 and a matching network 25. It is to be understood that the filter network may also be referred to as a filter circuit, and the matching network may also be referred to as a matching circuit, a tuning network, etc.
The filter network 24 is electrically connected to the first differential signal terminal 211 of the NFC chip 21, the phase shift circuit 22, and the antenna 23. That is, the antenna 23 is electrically connected to the first differential signal terminal 211 and the phase shift circuit 22 through the filter network 24.
The filter network 24 is configured to filter a mixed signal of the first differential signal and the adjusted second differential signal. Wherein, the filter network 24 allows the mixed signal to pass through and prevents signals except the mixed signal from passing through, so as to filter out the interference signal and avoid the interference signal from causing interference to the NFC signal transmitted by the antenna 23.
It will be appreciated that the filter network 24 may include a circuit consisting of a series or parallel connection of capacitors, inductors, and the like.
The matching network 25 is electrically connected to the filter network 24 and the antenna 23. That is, the antenna 23 is electrically connected to the filter network 24 through the matching network 25. The matching network 25 is used for matching the impedance of the antenna 23 when transmitting the mixed signal.
It is understood that the matching network 25 may also include a circuit formed by a series connection or a parallel connection of capacitors and inductors, and the matching network 25 may further include a resistor.
The filter network 24 and the matching network 25 may be combined together, or may be divided into two parts, as long as the functions of filtering and impedance matching adjustment are achieved.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a second electronic device 100 according to an embodiment of the present disclosure.
Wherein the electronic device 100 further comprises a communication circuit 31. The communication circuit 31 is configured to output a communication signal. The communication signal includes at least one of a Radio Frequency (RF) signal, a wireless fidelity (Wi-Fi) signal, and a Global Positioning System (GPS) signal.
The antenna 23 is also electrically connected to the communication circuit 31. Thus, the antenna 23 may also be used for transmitting the communication signal. Thus, multiplexing of the antenna 23 can be achieved, and both transmission of NFC signals and transmission of communication signals can be achieved by the antenna 23.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a third electronic device 100 according to an embodiment of the present disclosure.
Wherein the electronic device 100 further comprises a first isolation circuit 32 and a second isolation circuit 33.
The first isolation circuit 32 is disposed between the communication circuit 31 and the antenna 23, that is, the antenna 23 is electrically connected to the communication circuit 31 through the first isolation circuit 32. The first isolation circuit 32 is configured to isolate the mixed signal, that is, isolate the first differential signal and the adjusted second differential signal, and avoid interference of the mixed signal of the first differential signal and the adjusted second differential signal on the communication signal.
The second isolation circuit 33 is disposed between the NFC chip 21, the phase shift circuit 22 and the antenna 23, that is, the antenna 23 is electrically connected to the first differential signal terminal 211 of the NFC chip 21 and the phase shift circuit 22 through the second isolation circuit 33. The second isolation circuit 33 is configured to isolate the communication signal, so as to avoid the communication signal from interfering with the mixed signal, that is, avoid the communication signal from interfering with the NFC function of the electronic device 100.
It is understood that the first isolation circuit 32 and the second isolation circuit 33 may each include a circuit formed by a capacitor, an inductor, or a parallel connection or a series connection of inductors.
It will be appreciated that the antenna 23 may be implemented in a number of ways. For example, the circuit board 30 of the electronic device 100 may be provided with printed circuits for transmitting electrical signals. Wherein the antenna 23 may include the printed wiring. That is, the antenna 23 is formed by a printed wiring on the circuit board 30.
For another example, referring to fig. 8, fig. 8 is a schematic diagram of a fourth structure of the electronic device 100 according to the embodiment of the present application.
The electronic device 100 includes a metal bezel 50. The metal bezel 50 may be formed as part of the housing 20. The metal frame 50 may be an aluminum alloy frame, for example. The metal bezel 50 may surround the periphery of the middle frame of the electronic device 100. Wherein, a first metal branch 51 is formed on the metal frame 50. For example, the metal bezel 50 may be provided with a slit 52 and a slit 53, and the first metal branch 51 may be formed by the slit 52 and the slit 53. The antenna 23 comprises the first metal branch 51. That is, the antenna 23 is formed by the first metal branch 51.
Therefore, the antenna 23 does not need to be separately provided on the electronic device 100, and the antenna 23 can be formed by the metal frame 50, which can further simplify the design of the NFC antenna.
For another example, referring to fig. 9, fig. 9 is a schematic diagram of a fifth structure of the electronic device 100 according to the embodiment of the present application.
The electronic device 100 includes a battery cover 60. The battery cover 60 may be included as part of the housing 20. The battery cover 60 may be an aluminum alloy battery cover, for example. The battery cover 60 is used to cover the battery 40 of the electronic device 100. Wherein, a second metal branch 61 is formed on the battery cover 60. For example, a U-shaped slit may be formed on the battery cover 60 to form the second metal branch 61. The antenna 23 comprises the second metal stub 61. That is, the antenna 23 is formed by the second metal branch 61.
Thus, the antenna 23 can be formed by the battery cover 60 without separately providing the antenna 23 on the electronic device 100, and the design of the NFC antenna can be further 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 (13)
1. An antenna device, comprising:
the near field communication chip comprises a first differential signal end and a second differential signal end, wherein the first differential signal end is used for outputting a first differential signal, and the second differential signal end is used for outputting a second differential signal;
the phase shift circuit is electrically connected with the second differential signal end and is used for adjusting the phase of the second differential signal to obtain an adjusted second differential signal;
and the antenna is electrically connected with the first differential signal end and the phase-shifting circuit and is used for transmitting a mixed signal of the first differential signal and the adjusted second differential signal.
2. The antenna device according to claim 1, wherein the phase of the adjusted second differential signal is the same as the phase of the first differential signal.
3. The antenna device according to claim 1, wherein the phase shift circuit is configured to adjust the phase of the second differential signal by 180 degrees.
4. The antenna device according to any of claims 1 to 3, wherein the phase shifting circuit comprises one or more of a phase shifter, an inductance, a conductive path.
5. The antenna device according to any one of claims 1 to 3, further comprising:
and the antenna is electrically connected with the first differential signal end and the phase-shifting circuit through the filter network, and the filter network is used for filtering the mixed signal.
6. The antenna device according to claim 5, wherein the filter network allows the mixed signal to pass through and prevents signals other than the mixed signal from passing through.
7. The antenna device of claim 5, further comprising:
the antenna is electrically connected with the filter network through the matching network, and the matching network is used for matching the impedance of the antenna when the antenna transmits the mixed signal.
8. An electronic device, characterized in that it comprises an antenna device according to any one of claims 1 to 7.
9. The electronic device of claim 8, further comprising:
a communication circuit for outputting a communication signal comprising at least one of a radio frequency signal, a wireless fidelity signal, a global positioning system signal;
the antenna is also electrically connected with the communication circuit, and the antenna is also used for transmitting the communication signal.
10. The electronic device of claim 9, further comprising:
a first isolation circuit, through which the antenna is electrically connected to the communication circuit, for isolating the mixed signal;
and the antenna is electrically connected with the first differential signal end and the phase-shifting circuit through the second isolation circuit, and the second isolation circuit is used for isolating the communication signals.
11. The electronic device of any of claims 8-10, further comprising:
the antenna comprises a circuit board, wherein a printed circuit is arranged on the circuit board, and the antenna comprises the printed circuit.
12. The electronic device of any of claims 8-10, further comprising:
the antenna comprises a metal frame, wherein a first metal branch is formed on the metal frame, and the antenna comprises the first metal branch.
13. The electronic device of any of claims 8-10, further comprising:
the battery cover is provided with a second metal branch, and the antenna comprises the second metal branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020484812.9U CN211266909U (en) | 2020-04-03 | 2020-04-03 | Antenna device and electronic apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020484812.9U CN211266909U (en) | 2020-04-03 | 2020-04-03 | Antenna device and electronic apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211266909U true CN211266909U (en) | 2020-08-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020484812.9U Active CN211266909U (en) | 2020-04-03 | 2020-04-03 | Antenna device and electronic apparatus |
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| Country | Link |
|---|---|
| CN (1) | CN211266909U (en) |
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- 2020-04-03 CN CN202020484812.9U patent/CN211266909U/en active Active
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