WO2023030400A1 - Antenna module and electronic device - Google Patents

Abstract

The present application belongs to the technical field of electronics. Disclosed are an antenna module and an electronic device. The antenna module comprises a first antenna layer and a second antenna layer, wherein the first antenna layer works in a high-frequency band, the second antenna layer works in a low-frequency band, the first antenna layer is located above the second antenna layer, the antenna of the first antenna layer is provided with a first high-pass low-resistance matching circuit, and the first high-pass low-resistance matching circuit is used for making the first antenna layer not be turned on with respect to the frequency of the second antenna layer.

Description

Antenna Module and Electronics

cross reference

The present invention claims the priority of a Chinese patent application filed with the China Patent Office on August 31, 2021, with the application number 202111017264.4 and the title of the invention "Antenna Module and Electronic Equipment", the entire contents of which are incorporated herein by reference .

technical field

The present application belongs to the field of electronics, and in particular relates to an antenna module and electronic equipment.

Background technique

With the development of electronic technology, electronic equipment has more and more communication functions, and it is often necessary to install antenna modules that are independent of each other and work in different frequency bands on the electronic equipment. For example, with the gradual maturity of ultra-wideband technology (Ultra Wide Band, UWB), it has become a trend to commercialize UWB technology on mobile phones. Since the design of wireless charging has already occupied the space in the battery area, technicians often use the UWB antenna module The NFC (Near Field Communication, NFC) antenna module is designed on the upper half of the phone.

In related technologies, antenna modules working in different frequency bands are usually arranged on the same horizontal plane, which leads to the problem that the antenna modules occupy a large area.

Contents of the invention

The purpose of the embodiments of the present application is to provide an antenna module and an electronic device, which can solve the problem that the antenna module occupies a large area.

In the first aspect, the embodiment of the present application provides an antenna module, the antenna module includes a first antenna layer and a second antenna layer, the first antenna layer works in the high-frequency band, and the second antenna layer works in the In the low-frequency band, the first antenna layer is located above the second antenna layer, and the antenna of the first antenna layer is provided with a first high-pass low-impedance matching circuit, and the first high-pass low-impedance matching circuit is used to make The first antenna layer is frequency non-conductive with respect to the second antenna layer.

In a second aspect, an embodiment of the present application provides an electronic device, where the electronic device includes the antenna module as described in the first aspect.

In the embodiment of the present application, by providing an antenna module, the antenna module includes a first antenna layer and a second antenna layer, the first antenna layer works in a high-frequency band, and the second antenna layer works in a low-frequency band frequency band, the first antenna layer is located above the second antenna layer, the antenna of the first antenna layer is provided with a first high-pass low-impedance matching circuit, and the first high-pass low-impedance matching circuit is used to make the The frequency of the first antenna layer is not conducted with respect to the second antenna layer, which can solve the problem that the antenna module occupies a large area.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Further understanding of the application, the exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation to the application.

FIG. 1 is a schematic diagram of the layout of an antenna module in an electronic device in the related art;

2 is a schematic cross-sectional view of an antenna module according to an embodiment of the present application;

FIG. 3 is a schematic front view of a first antenna layer according to an embodiment of the present application;

FIG. 4 is a schematic front view of a second antenna layer according to an embodiment of the present application;

Fig. 5 is a schematic layout diagram of an antenna module in an electronic device according to the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

FIG. 1 shows a schematic diagram of the layout of an antenna module in an electronic device in the related art. An NFC antenna module 1 operating in the low frequency band, a UWB antenna module 2 operating in the high frequency band, and a camera module 3 are arranged on the upper part of the electronic device, wherein the NFC antenna module 1 is arranged around the same horizontal plane of the UWB antenna module 2 . Usually, the UWB antenna module 2 occupies an area of about 30×30 square millimeters, and the UWB antenna module 2 and the NFC antenna module 1 occupy a total area of about 45×45 square millimeters.

It can be seen that the width of the electronic device is limited. After the NFC antenna module 1, the UWB antenna module 2 and the camera module 3 are arranged on the upper part of the electronic device, the remaining area is limited, and as people's demand for the camera function of the electronic device increases As the camera module 3 increases, the area occupied by the camera module 3 will become larger and larger, and the area that the camera module 3 can occupy is obviously affected by the antenna module. It can be seen that, in the related art, there is a problem that the area occupied by the antenna module is relatively large. How to optimize the layout design of the antenna module to reduce the occupied area of the antenna module has become an urgent technical problem to be solved.

In order to solve the above problems, an embodiment of the present application provides an antenna module. As shown in FIG. 2 , it is a schematic cross-sectional view of an antenna module according to an embodiment of the present application. The antenna module includes a first antenna layer 4 and a second antenna layer 5, the first antenna layer 4 works in the high frequency band, the second antenna layer 5 works in the low frequency band, and the first antenna layer 4 is located at Above the second antenna layer 5, the antenna of the first antenna layer 4 is provided with a first high-pass low-impedance matching circuit, and the first high-pass low-impedance matching circuit is used to make the first antenna layer 4 relatively The frequency of the second antenna layer 5 is not conducted.

Wherein, the first antenna layer 4 is located above the second antenna layer 5, it should be understood that the first antenna layer 4 and the second antenna layer 5 are designed in a laminated layer. For example, in the prior art, mutually independent antennas are arranged in different areas of a double-layer flexible circuit board (FPC), while in the embodiment of the present application, the first antenna layer 4 is respectively arranged on the upper and lower layers of the same area of a double-layer FPC. With the second antenna layer 5, the first antenna layer 4 and the second antenna layer 5 are in the same vertical direction, so that the space in the same vertical direction can be multiplexed.

Since the first antenna layer 4 and the second antenna layer 5 are arranged in the same vertical direction, compared with the prior art where the first antenna layer 4 and the second antenna layer 5 are arranged on the same horizontal plane different areas, which can effectively reduce the area occupied by the antenna module. Moreover, the number of layers occupied by the first antenna layer 4 and the second antenna layer 5 in the embodiment of the present application is the same as the number of layers occupied by the parallel layout, both of which are two layers, so that the antenna module can be reduced While reducing the occupied area, it can not increase the occupied height.

As shown in FIG. 3 , it is a schematic front view of the first antenna layer according to an embodiment of the present application. 6 is the routing area of the first antenna layer, and the embodiment of the present application does not limit the routing method. 7 , 8 , and 9 are the first high-pass low-impedance matching circuits provided on the antenna of the first antenna layer 4 . Since the high-pass low-impedance matching circuit can effectively reduce the interference of low-frequency signals, and the second antenna layer 5 works in the low-frequency band, the first high-pass low-impedance matching circuit 7-9 can make the first antenna layer 4 Relative to the second antenna layer 5, the frequency is not conducted, so as to achieve the floating effect. In other words, the first high-pass low-impedance matching circuit 7-9 can prevent the first antenna layer 4 from being interfered by the low-frequency signal of the second antenna layer 5, and at the same time, can also avoid the interference of the second antenna layer 5. The electromagnetic energy of the low-frequency signal on layer 5 is shielded and stored by the first antenna layer, resulting in the problem that the electromagnetic energy of the second antenna layer 5 cannot be effectively radiated.

Therefore, the embodiment of the present application provides an antenna module, the antenna module includes a first antenna layer and a second antenna layer, the first antenna layer works in a high-frequency band, and the second antenna layer works in a low-frequency band frequency band, the first antenna layer is located above the second antenna layer, the antenna of the first antenna layer is provided with a first high-pass low-impedance matching circuit, and the first high-pass low-impedance matching circuit is used to make the The frequency of the first antenna layer is not conducted with respect to the second antenna layer to achieve a suspended effect, and the stacked design of the first antenna layer and the second antenna layer can be used to reuse the space in the same vertical direction, effectively reducing the The area occupied by the small antenna module, and through the high-pass low-impedance matching circuit on the first antenna layer, ensure the normal operation of the first antenna layer and the second antenna layer of the laminated design in their respective frequency bands.

In an implementation manner, the first antenna layer includes at least one antenna, and the at least one antenna is respectively provided with the first high-pass low-impedance matching circuits.

For example, as shown in FIG. 3 , the first antenna layer includes three antennas and each antenna is respectively provided with the first high-pass low-impedance matching circuit, such as 7, 8, and 9 in FIG. 3 . The embodiment of the present application does not limit the number of antennas included in the first antenna layer.

By setting a high-pass low-resistance matching circuit on each antenna of the first antenna layer, the interference of low-frequency signals can be effectively reduced, and at the same time, the electromagnetic energy of the low-frequency signal of the second antenna layer is prevented from being shielded and stored by the first antenna layer , leading to the problem that the electromagnetic energy of the second antenna layer cannot be effectively radiated.

As shown in FIG. 4 , it is a schematic front view of the second antenna layer according to an embodiment of the present application. 10 are antennas of the second antenna layer, and 11-12 are feeding matching ports of the second antenna layer.

In order to meet the design requirements of technicians, the second antenna layer 5 is lowered to the ground relative to the first antenna layer 4. In one implementation, the antenna 10 of the second antenna layer 5 is provided with a second high-pass A low-impedance matching circuit 13 - 15 , the second high-pass low-impedance matching circuit 13 - 15 is used to ground the second antenna layer 5 relative to the first antenna layer 4 .

Since the high-pass low-impedance matching circuit can effectively conduct high-frequency signals, and the first antenna layer 4 works in the high-frequency band, the second high-pass low-impedance matching circuit 13-15 can make the first antenna layer 4 of the high-frequency signal is connected to the ground through the second antenna layer 5 without directly connecting the first antenna layer to the ground. In other words, the antenna 10 on the second antenna layer 5 The second high-pass low-resistance matching circuit 13-15 can make the second antenna layer 5 be grounded relative to the first antenna layer 4, thereby meeting the design requirements of technicians.

In order to meet the design requirements of technicians, the second antenna layer 5 achieves the effect of increasing headroom relative to the first antenna layer 4 . In one implementation, the antenna 10 of the second antenna layer 5 is provided with a first low-pass high-impedance matching circuit or a band-pass network, and the first low-pass high-impedance matching circuit or the band-pass network is used To make the second antenna layer 5 frequency non-conductive relative to the first antenna layer 4 .

Because the low-pass high-impedance matching circuit can effectively reduce the interference of high-frequency signals, the band-pass network can effectively reduce the interference of low-frequency signals and high-frequency signals, and the first antenna layer 4 works in the high-frequency band, therefore, the first A low-pass high-impedance matching circuit or the band-pass network can prevent the second antenna layer 5 from being interfered by the low-frequency signal of the first antenna layer 4, in other words, the first low-pass high-impedance matching The circuit or the band-pass network can make the frequency of the second antenna layer 5 non-conductive relative to the first antenna layer 4 to achieve the effect of increasing headroom, thereby meeting the design requirements of technicians.

In another implementation, the circuit path of the second antenna layer 5 is provided with a second low-pass high-impedance matching circuit, and the second low-pass high-impedance matching circuit is used to make the second antenna layer 5 The frequency of the first antenna layer 4 is not conducted.

The second low-pass high-impedance matching circuit is directly arranged on the circuit path of the second antenna layer 5, for example, at the feeding matching port 11-12 of the second antenna layer, so that the second The antenna 10 of the antenna layer 5 is open to high frequency, therefore, the second low-pass high-impedance matching circuit can prevent the second antenna layer 5 from being disturbed by the low-frequency signal of the first antenna layer 4, in other words , the second low-pass high-impedance matching circuit can make the frequency of the second antenna layer 5 non-conductive relative to the first antenna layer 4 to achieve the effect of increasing headroom, thereby meeting the design requirements of technicians.

In an implementation manner, the first antenna layer works at 3.1 gigahertz to 10.6 gigahertz, and the second antenna layer works at 13.56 megahertz.

In an implementation manner, the first antenna layer working in the high frequency band may be a UWB layer, and the second antenna layer working in the low frequency band may be an NFC layer. It can be understood that the first antenna layer may be another functional layer working in a high frequency band, and the second antenna layer may be another functional layer working in a low frequency band, which is not specifically limited in this embodiment of the present application.

On the basis of the above antenna module provided in the embodiments of the present application, the embodiments of the present application further provide an electronic device, where the electronic device may include the antenna module described in any of the foregoing embodiments.

As shown in FIG. 5 , it is a schematic layout diagram of an antenna module in an electronic device according to the present application. The antenna module 16 can utilize the stacked design of the first antenna layer and the second antenna layer to reuse the space in the same vertical direction, effectively reducing the area occupied by the antenna module 16, and through the high pass on the first antenna layer The low-impedance matching circuit ensures the normal operation of the first antenna layer and the second antenna layer of the laminated design in their respective frequency bands.

In an implementation manner, the electronic device further includes a camera module, and the camera module is arranged in parallel with the antenna module.

As shown in FIG. 5 , the camera module 3 is arranged parallel to the antenna module 16 . It can be seen that, compared with the prior art shown in FIG. 1 , the area occupied by the antenna module 16 in the embodiment of the present application is greatly reduced. After the camera module 3 and the antenna module 16 are installed in the electronic device, Increased free space.

The electronic devices provided in the embodiments of the present application may be electronic devices such as mobile phones, tablet computers, e-book readers, and game consoles, and the embodiments of the present application do not limit the specific types of electronic devices.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims (10)

An antenna module, the antenna module includes a first antenna layer and a second antenna layer, the first antenna layer works in a high-frequency band, the second antenna layer works in a low-frequency band, and the first antenna layer is located at Above the second antenna layer, a first high-pass low-impedance matching circuit is arranged on the antenna of the first antenna layer, and the first high-pass low-impedance matching circuit is used to make the first antenna layer relative to the The frequency of the second antenna layer is not conducted. The antenna module according to claim 1, wherein the first antenna layer includes at least one antenna, and the at least one antenna is respectively provided with the first high-pass low-impedance matching circuits. The antenna module according to claim 1, wherein a second high-pass low-impedance matching circuit is provided on the antenna of the second antenna layer, and the second high-pass low-impedance matching circuit is used to make the second antenna layer relatively ground below the first antenna layer. The antenna module according to claim 1, wherein the antenna of the second antenna layer is provided with a first low-pass high-impedance matching circuit or a band-pass network, and the first low-pass high-impedance matching circuit or the band-pass network The communication network is used to make the second antenna layer frequency non-conductive with respect to the first antenna layer. The antenna module according to claim 1, wherein a second low-pass high-impedance matching circuit is provided on the circuit path of the second antenna layer, and the second low-pass high-impedance matching circuit is used to make the second The antenna layer is not conducting in frequency with respect to the first antenna layer. The antenna module according to claim 1, wherein the first antenna layer is a UWB layer. The antenna module according to claim 1, wherein the second antenna layer is an NFC layer. The antenna module according to claim 1, wherein the first antenna layer operates at 3.1 GHz to 10.6 GHz, and the second antenna layer operates at 13.56 MHz. An electronic device, comprising the antenna module according to any one of claims 1-8. The electronic device according to claim 9, wherein the electronic device further comprises a camera module, and the camera module is arranged in parallel with the antenna module.

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