Antenna module and electronic device

Abstract

The present application discloses an antenna module and an electronic device, belonging to the field of electronics. The antenna module includes a first antenna layer and a second antenna layer. The first antenna layer operates in a high-frequency band, and the second antenna layer operates in a low-frequency band. The first antenna layer is located above the second antenna layer. A first high-pass and low-resistance matching circuit is provided on the antenna of the first antenna layer, and the first high-pass and low-resistance matching circuit is used to make the first antenna layer non-conductive with respect to the second antenna layer in terms of frequency.

Description

Technical Field

[0001] This application belongs to the field of electronics, and particularly relates to an antenna module and an electronic device. Background Art

[0002] With the development of electronic technology, the communication functions of electronic devices are becoming increasingly rich, and it is often necessary to set up independent antenna modules operating in different frequency bands on the electronic devices. For example, with the gradual maturity of the Ultra WideBand (UWB) technology, it has become a trend to commercially apply the UWB technology to mobile phones. Since the space in the battery area has been occupied by the design of wireless charging, technicians often design the UWB antenna module and the Near Field Communication (NFC) antenna module on the upper half of the mobile phone.

[0003] In the related art, antenna modules operating in different frequency bands are usually arranged on the same horizontal plane, resulting in the problem of large occupied area of the antenna modules. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide an antenna module and an electronic device, which can solve the problem of large occupied area of the antenna module.

[0005] In a first aspect, the embodiments of this application provide an antenna module. The antenna module includes a first antenna layer and a second antenna layer. The first antenna layer operates in a high-frequency band, and the second antenna layer operates in a low-frequency band. The first antenna layer is located above the second antenna layer, and a first high-pass low-impedance matching circuit is provided on the antenna of the first antenna layer. The first high-pass low-impedance matching circuit is used to make the first antenna layer non-conductive with respect to the second antenna layer in terms of frequency.

[0006] In a second aspect, the embodiments of this application provide an electronic device, which includes the antenna module as described in the first aspect.

[0007] In the embodiments of this application, by providing an antenna module, which includes a first antenna layer and a second antenna layer, the first antenna layer operates in a high-frequency band, the second antenna layer operates in a low-frequency band, the first antenna layer is located above the second antenna layer, and a first high-pass low-impedance matching circuit is provided on the antenna of the first antenna layer. The first high-pass low-impedance matching circuit is used to make the first antenna layer non-conductive with respect to the second antenna layer in terms of frequency, the problem of large occupied area of the antenna module can be solved. Description of the Drawings

[0008] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. The accompanying drawings described herein are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application.

[0009] Figure 1 is a schematic layout diagram of an antenna module in an electronic device in the related art;

[0010] Figure 2 is a schematic cross-sectional view of an antenna module according to an embodiment of the present application;

[0011] Figure 3 is a front view of a first antenna layer according to an embodiment of the present application;

[0012] Figure 4 is a front view of a second antenna layer according to an embodiment of the present application;

[0013] Figure 5 is a schematic layout diagram of an antenna module in an electronic device according to an embodiment of the present application. Detailed implementation manners

[0014] The following will clearly describe the technical solutions in the embodiments of the present application in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0015] Figure 1 Shows a schematic layout diagram of an antenna module in an electronic device in the related art. An NFC antenna module 1 operating in a low-frequency band, a UWB antenna module 2 operating in a high-frequency band, and a camera module 3 are provided in the upper half of the electronic device. Among them, the NFC antenna module 1 is arranged around the UWB antenna module 2 on the same horizontal plane. Usually, the UWB antenna module 2 occupies an area of about 30×30 square millimeters, and the total area occupied by the UWB antenna module 2 plus the NFC antenna module 1 is about 45×45 square millimeters.

[0016] 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 in the upper part of the electronic device, the remaining area is limited. Moreover, with the increasing demand for the camera function of the electronic device, 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. Thus, in the related art, there is a problem that the antenna module occupies a large area. How to optimize the layout design of the antenna module to reduce the area occupied by the antenna module has become an urgent technical problem to be solved.

[0017] To solve the above problems, an embodiment of the present application provides an antenna module. As Figure 2 shown, 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 operates in a high-frequency band, and the second antenna layer 5 operates in a low-frequency band. The first antenna layer 4 is located above the second antenna layer 5. A first high-pass and low-resistance matching circuit is arranged on the antenna of the first antenna layer 4, and the first high-pass and low-resistance matching circuit is used to make the first antenna layer 4 non-conductive with respect to the second antenna layer 5 in terms of frequency.

[0018] Among them, the first antenna layer 4 being located above the second antenna layer 5 should be understood that the first antenna layer 4 and the second antenna layer 5 are in a stacked design. For example, in the prior art, antennas that are independent of each other are arranged in different areas of a double-layer flexible printed circuit board (FPC), while in the embodiment of the present application, the first antenna layer 4 and the second antenna layer 5 are respectively arranged on the upper and lower layers in the same area of the double-layer FPC, so that the first antenna layer 4 and the second antenna layer 5 are in the same vertical direction, thereby enabling the reuse of the space in the same vertical direction.

[0019] Since the first antenna layer 4 and the second antenna layer 5 are arranged in the same vertical direction, compared with the prior art in which the first antenna layer 4 and the second antenna layer 5 are arranged in different areas on the same horizontal plane, it 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 that occupied by the parallel layout, both being two layers. Thus, while reducing the area occupied by the antenna module, it can also not increase the occupied height.

[0020] As Figure 3As shown, it is a 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 present application embodiment does not limit the routing method. 7, 8, and 9 are the first high-pass and low-impedance matching circuits provided on the antenna of the first antenna layer 4. Since the high-pass and low-impedance matching circuit can effectively reduce the interference of low-frequency signals, and the second antenna layer 5 operates in a low-frequency band, therefore, the first high-pass and low-impedance matching circuits 7-9 can make the first antenna layer 4 non-conductive with respect to the second antenna layer 5 in terms of frequency, achieving a floating effect. In other words, the first high-pass and low-impedance matching circuits 7-9 can make the first antenna layer 4 not be interfered by the low-frequency signals of the second antenna layer 5. At the same time, it can also avoid the problem that the electromagnetic energy of the low-frequency signals of the second antenna layer 5 is shielded and stored by the first antenna layer, resulting in the ineffective radiation of the electromagnetic energy of the second antenna layer 5.

[0021] Therefore, an antenna module provided by an embodiment of the present application includes a first antenna layer and a second antenna layer. The first antenna layer operates in a high-frequency band, the second antenna layer operates in a low-frequency band, the first antenna layer is located above the second antenna layer, and a first high-pass and low-impedance matching circuit is provided on the antenna of the first antenna layer. The first high-pass and low-impedance matching circuit is used to make the first antenna layer non-conductive with respect to the second antenna layer in terms of frequency, achieving a floating effect. It 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, and through the high-pass and low-impedance matching circuit on the first antenna layer, ensuring the normal operation of the stacked first antenna layer and the second antenna layer in their respective frequency bands.

[0022] In one implementation, the first antenna layer includes at least one antenna, and the first high-pass and low-impedance matching circuits are respectively provided on the at least one antenna.

[0023] For example Figure 3 As shown, the first antenna layer includes three antennas, and the first high-pass and low-impedance matching circuits are respectively provided on each antenna. For example Figure 3 7, 8, and 9 in. The present application embodiment does not limit the number of antennas included in the first antenna layer.

[0024] By providing a high-pass and low-impedance matching circuit on each antenna of the first antenna layer, the interference of low-frequency signals can be effectively reduced. At the same time, it can avoid the problem that the electromagnetic energy of the low-frequency signals of the second antenna layer is shielded and stored by the first antenna layer, resulting in the ineffective radiation of the electromagnetic energy of the second antenna layer.

[0025] Such as Figure 4As shown, it is a front schematic diagram of the second antenna layer according to an embodiment of the present application. 10 is the antenna of the second antenna layer, and 11 - 12 are the feed matching ports of the second antenna layer.

[0026] To meet the design requirements of technicians and make the second antenna layer 5 lower than the first antenna layer 4, in one implementation, a second high-pass low-impedance matching circuit 13 - 15 is provided on the antenna 10 of the second antenna layer 5, and the second high-pass low-impedance matching circuit 13 - 15 is used to make the second antenna layer 5 lower than the first antenna layer 4.

[0027] Since the high-pass low-impedance matching circuit can effectively conduct high-frequency signals, and the first antenna layer 4 operates in a high-frequency band, therefore, the second high-pass low-impedance matching circuit 13 - 15 can make the high-frequency signals of the first antenna layer 4 conduct to the ground through the second antenna layer 5 without directly connecting the first antenna layer to the ground. In other words, the second high-pass low-impedance matching circuit 13 - 15 on the antenna 10 of the second antenna layer 5 can make the second antenna layer 5 lower than the first antenna layer 4, thereby meeting the design requirements of technicians.

[0028] To meet the design requirements of technicians and make the second antenna layer 5 achieve the effect of increasing clearance relative to the first antenna layer 4. In one implementation, a first low-pass high-impedance matching circuit or a band-pass network is provided on the antenna 10 of the second antenna layer 5, and the first low-pass high-impedance matching circuit or the band-pass network is used to make the second antenna layer 5 non-conductive in frequency relative to the first antenna layer 4.

[0029] Since the low-pass high-impedance matching circuit can effectively reduce the interference of high-frequency signals, and the band-pass network can effectively reduce the interference of low-frequency and high-frequency signals, and the first antenna layer 4 operates in a high-frequency band, therefore, the first low-pass high-impedance matching circuit or the band-pass network can make the second antenna layer 5 not be interfered by the low-frequency signals of the first antenna layer 4. In other words, the first low-pass high-impedance matching circuit or the band-pass network can make the second antenna layer 5 non-conductive in frequency relative to the first antenna layer 4, achieving the effect of increasing clearance, thereby meeting the design requirements of technicians.

[0030] In another implementation, a second low-pass high-impedance matching circuit is provided on the circuit path of the second antenna layer 5, and the second low-pass high-impedance matching circuit is used to make the second antenna layer 5 non-conductive in frequency relative to the first antenna layer 4.

[0031] The second low-pass and high-impedance matching circuit is directly disposed on the circuit path of the second antenna layer 5, for example, at the feed matching port 11-12 of the second antenna layer, so that the antenna 10 of the second antenna layer 5 is open for high frequencies. Therefore, the second low-pass and high-impedance matching circuit can prevent the second antenna layer 5 from being interfered by the low-frequency signals of the first antenna layer 4. In other words, the second low-pass and high-impedance matching circuit can make the second antenna layer 5 non-conductive with respect to the first antenna layer 4 in terms of frequency, achieving the effect of increasing the clearance, thereby meeting the design requirements of technicians.

[0032] In one implementation, the first antenna layer operates in the range of 3.1 GHz to 10.6 GHz, and the second antenna layer operates at 13.56 MHz.

[0033] In one implementation, the first antenna layer operating in the high-frequency band can be a UWB layer, and the second antenna layer operating in the low-frequency band can be an NFC layer. It can be understood that the first antenna layer can be other functional layers operating in the high-frequency band, and the second antenna layer can be other functional layers operating in the low-frequency band. The embodiments of the present application do not make specific limitations thereto.

[0034] Based on the above antenna module provided by the embodiments of the present application, the embodiments of the present application further provide an electronic device, which may include the antenna module described in any of the foregoing embodiments.

[0035] As Figure 5 shown, it is a layout diagram of the 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 ensuring the normal operation of the stacked first antenna layer and the second antenna layer in their respective frequency bands through the high-pass and low-impedance matching circuit on the first antenna layer.

[0036] In one implementation, the electronic device further includes a camera module, and the camera module is disposed in parallel with the antenna module.

[0037] As Figure 5 described, the camera module 3 is disposed in parallel with the antenna module 16. It can be seen that, compared with Figure 1 the prior art shown, the area occupied by the antenna module 16 in the embodiments of the present application is greatly reduced. After the camera module 3 and the antenna module 16 are disposed in the electronic device, the free area increases.

[0038] The electronic device provided by the embodiments of the present application can be an electronic device such as a mobile phone, a tablet computer, an e-book reader, a game console, etc. The embodiments of the present application do not limit the specific types of the electronic device.

[0039] It should be noted that, in this document, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or apparatus. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising that element.

[0040] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all of them fall within the protection scope of the present application.

Claims

1. An antenna module, characterized in that, The antenna module includes a first antenna layer and a second antenna layer. The first antenna layer operates in a high-frequency band, and the second antenna layer operates in a low-frequency band. The first antenna layer is located above the second antenna layer. A first high-pass and low-impedance matching circuit is provided on the antenna of the first antenna layer, and the first high-pass and low-impedance matching circuit is used to make the first antenna layer non-conductive with respect to the second antenna layer in terms of frequency; Among them, the first antenna layer includes three antennas, and the first high-pass and low-impedance matching circuit is respectively provided on each antenna; a second high-pass and low-impedance matching circuit is provided on the antenna of the second antenna layer, and the second high-pass and low-impedance matching circuit is used to ground the second antenna layer with respect to the first antenna layer; Among them, the first antenna layer is a UWB layer, and the second antenna layer is an NFC layer.

2. The antenna module according to claim 1, wherein A first low-pass and high-impedance matching circuit or a band-pass network is provided on the antenna of the second antenna layer, and the first low-pass and high-impedance matching circuit or the band-pass network is used to make the second antenna layer non-conductive with respect to the first antenna layer in terms of frequency.

3. The antenna module according to claim 1, wherein A second low-pass and high-impedance matching circuit is provided on the circuit path of the second antenna layer, and the second low-pass and high-impedance matching circuit is used to make the second antenna layer non-conductive with respect to the first antenna layer in terms of frequency.

4. The antenna module according to claim 1, characterized in that, The first antenna layer operates at 3.1 gigahertz to 10.6 gigahertz, and the second antenna layer operates at 13.56 megahertz.

5. An electronic device, characterized in that, Including the antenna module according to any one of claims 1-4.

6. The electronic device according to claim 5, characterized in that, The electronic device further includes a camera module, and the camera module is arranged in parallel with the antenna module.

Images