WO2021169832A1

WO2021169832A1 - Electronic device

Info

Publication number: WO2021169832A1
Application number: PCT/CN2021/076697
Authority: WO
Inventors: 简宪静; 马荣杰; 王义金
Original assignee: 维沃移动通信有限公司
Priority date: 2020-02-25
Filing date: 2021-02-18
Publication date: 2021-09-02
Also published as: CN111293412A

Abstract

The present invention provides an electronic device. The electronic device comprises a battery cover and an antenna module. The battery cover is provided with a metamaterial layer, the metamaterial layer comprises a plurality of metal units, the plurality of metal units are arranged in a periodic mode to form a metal unit array, and the metal units are metal rings with openings; and the antenna module is arranged on the inner side of the battery cover, the antenna module and the battery cover are arranged at an interval, and the vertical projection of the antenna module on the battery cover is located in the metamaterial layer.

Description

Electronic equipment

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 202010116814.7 filed in China on February 25, 2020, the entire content of which is incorporated herein by reference.

Technical field

The present invention relates to the technical field of communication equipment, and in particular to an electronic device.

Background technique

With the development of communication technology, in electronic devices such as mobile phones, an antenna module (ie, an antenna in package (Antenna in Package, AiP) module) is usually built in. For example, if the antenna module is arranged inside the battery cover, due to the shielding effect of the battery cover, the radiation performance of the antenna module is greatly deteriorated. Therefore, in the prior art, there is a problem that the radiation performance of the built-in antenna module is poor.

Summary of the invention

The embodiment of the present invention provides an electronic device to solve the problem of poor radiation performance of the built-in antenna module.

The embodiment of the present invention provides an electronic device, including:

A battery cover, the battery cover is provided with a metamaterial layer, the metamaterial layer includes a plurality of metal units, the metal units form an array in a periodic manner, and the metal units are metal rings with openings;

An antenna module, the antenna module is arranged inside the battery cover, the antenna module and the battery cover are spaced apart, and the vertical projection of the antenna module on the battery cover is located on the metamaterial Within the layer.

In the embodiment of the present invention, a metamaterial layer is provided at the position of the battery cover corresponding to the antenna module, and the metamaterial layer includes a plurality of metal units, and the plurality of metal units are arranged in a periodic manner to form a metal unit array. The unit is a metal ring with openings. In this way, the projection power of the beam signal on the battery cover is increased, thereby improving the coverage of the beam.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following will briefly introduce the drawings used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained from these drawings without creative labor.

Figure 1 is one of the structural diagrams of an electronic device provided by an embodiment of the present invention;

FIG. 2 is a second structural diagram of an electronic device provided by an embodiment of the present invention;

3 is one of the cross-sectional structure diagrams of the electronic device provided by the embodiment of the present invention;

4 is the second cross-sectional structure diagram of the electronic device provided by the embodiment of the present invention;

5 is the third cross-sectional structure diagram of the electronic device provided by the embodiment of the present invention;

FIG. 6 is a fourth cross-sectional structural diagram of an electronic device provided by an embodiment of the present invention;

FIG. 7 is a comparison diagram of the transmission power of the millimeter wave signal with the metamaterial layer and the transmission power of the millimeter wave signal without the metamaterial layer on the battery cover.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, similar words such as "one" or "one" do not mean a quantity limit, but mean that there is at least one. Similar words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship also changes accordingly.

Referring to Figures 1 to 6, an embodiment of the present invention provides an electronic device. As shown in the figure, the electronic device includes:

A battery cover 10, the battery cover 10 is provided with a metamaterial layer 101, the metamaterial layer 101 includes a plurality of metal units 1011, the plurality of metal units 1011 are arranged in a periodic manner to form a metal unit array, the The metal unit 1011 is a metal ring with an opening;

The antenna module 11 is arranged on the inner side of the battery cover 10, the antenna module 11 and the battery cover 10 are spaced apart, and the antenna module 11 is located on the inner side of the battery cover 10 The vertical projection is located in the metamaterial layer 101.

In the embodiment of the present invention, the above-mentioned antenna module 11 may be arranged directly opposite to the metamaterial layer 101, and there is a gap between the metamaterial layer 101 and the antenna module 11, and the size of the gap is related to the operating frequency of the antenna module 11.

As shown in FIGS. 1 and 2, in an optional embodiment, the above-mentioned multiple metal units 1011 may be arranged at even intervals to form a two-dimensional matrix. Specifically, the number of metal units 1011 is not further limited herein.

Further, the size of the metamaterial layer can be set according to actual needs. For example, in order to avoid the influence on other antenna structures, in this embodiment, the metamaterial layer is only provided at a position corresponding to the antenna module 11.

The shape of the aforementioned metal unit 1011 can be set according to actual needs. As shown in FIG. 1, in one embodiment, the metal unit 1011 is a non-circular ring with an opening (that is, a non-circular metal ring). As shown in FIG. 2, in another embodiment, the metal unit 1011 is a circular ring with an opening. In this embodiment, the metal unit 1011 is a metal ring with an opening, which can also be called a split resonant ring. Since the metal unit 1011 of the split ring structure has impedance matching with a large scanning angle, the beam signal is at a large scanning angle. The transmitted power is enhanced to improve the coverage of the beam.

In the embodiment of the present invention, a metamaterial layer 101 is provided at the position of the battery cover corresponding to the antenna module, and the metamaterial layer 101 includes a plurality of metal units 1011, and the plurality of metal units 1011 are arranged in a periodic manner to form a metal unit array The metal unit 1011 is a metal ring with an opening. In this way, the projection power of the beam signal on the battery cover 10 is increased, thereby improving the coverage of the beam.

It should be noted that the above-mentioned setting method of the metal unit 1011 can be set according to actual needs. The detailed description will be given below with reference to FIGS. 3 to 6.

As shown in FIG. 3, in one embodiment, the metal unit 1011 is located between the battery cover 10 and the antenna module 11, and is attached to the battery cover 10.

In this embodiment, the battery cover 10 can be directly used as a substrate, and the metal unit 1011 can be printed on the battery cover 10. It is also possible to use a flexible printed circuit (Flexible Printed Circuit, FPC) process to form the metal unit 1011, and then paste it on the inner side of the battery cover 10.

Further, based on the embodiment of FIG. 3, dielectric materials can also be added to effectively protect the metal unit 1011. As shown in FIG. 4, in another embodiment, the metamaterial layer 101 further includes a dielectric layer 1012, and the dielectric layer 1012 and the battery cover 10 sandwich the metal unit 1011.

The dielectric material of the dielectric layer 1012 can refer to related technologies, which is not further limited here. Since the metal unit 1011 is clamped by the dielectric layer 1012 and the battery cover 10, the metal unit 1011 can be prevented from contacting with external devices. Therefore, the service life of the metal unit 1011 can be effectively extended and the reliability of communication can be improved.

Optionally, referring to FIG. 5, in another optional embodiment, the metamaterial layer 101 further includes a dielectric layer 1012, and the dielectric layer 1012 is located between the battery cover 10 and the antenna module 11, The metal unit 1011 is located in the dielectric layer 1012.

In this embodiment, the FPC process can be used to fabricate the metamaterial layer 101, so that both sides of the metal unit 1011 are dielectric layers 1012, and the metamaterial layer 101 is adhesively fixed on the inside of the battery cover.

Optionally, referring to FIG. 6, in another optional embodiment, the above-mentioned metal unit 1011 is located in the battery cover 10. In this embodiment, holes or grooves may be provided in the battery cover 10 to embed the metamaterial layer 101 in the battery cover 10, or the metamaterial layer 101 may be added when the battery cover 10 is made. In this embodiment, since the metal unit 1011 is disposed inside the battery cover 10, the increase in the thickness of the battery cover 10 can be avoided, which is beneficial to the miniaturization design of the electronic device.

Optionally, the antenna module includes a millimeter wave antenna array. It should be understood that in other embodiments, the antenna array in the antenna module may also be in other forms, which will not be listed here. In the embodiment of the present invention, the millimeter wave antenna array may be a one-dimensional antenna array or a two-dimensional antenna array. As shown in FIG. 1, in this embodiment, the millimeter wave antenna array is a one-dimensional antenna array. It may include four antenna elements, and the four antenna elements may be arranged in a straight line and evenly spaced.

Further, in order to increase the power of the beam transmission, in this embodiment, the distance between the antenna module 11 and the metamaterial layer 101, the size of the metal unit 1011, and the distance between two adjacent metal units can be determined. The size is limited, which will be explained in detail below.

In an optional embodiment, the vertical distance from the antenna module 11 to the metamaterial layer 101 is equal to a quarter wavelength of the operating frequency of the antenna module 11 in free space.

As shown in FIG. 3, the vertical distance from the antenna module 11 to the metamaterial layer 101 can be understood as the vertical distance d1 from the antenna of the antenna module 11 to the metal unit 1011.

As shown in FIG. 4, the vertical distance from the antenna module 11 to the metamaterial layer 101 can be understood as the vertical distance d2 from the antenna of the antenna module 11 to the dielectric layer 1012.

As shown in FIG. 5, the vertical distance from the antenna module 11 to the metamaterial layer 101 can be understood as the vertical distance d3 from the antenna of the antenna module 11 to the dielectric layer 1012.

As shown in FIG. 6, the vertical distance from the antenna module 11 to the metamaterial layer 101 can be understood as the vertical distance d4 from the antenna of the antenna module 11 to the metal unit 1011.

In an optional embodiment, the size of the metal unit 1011 can be set according to actual needs. For example, in an embodiment, when the metal unit 1011 is a ring with an opening, the metal unit 1011 The ratio of the diameter of the antenna module 11 to the wavelength of the working frequency of the antenna module 11 in free space is greater than or equal to 0.9 and less than or equal to 1.

In other embodiments, when the metal unit 1011 is a non-circular structure with openings, the size of the metal unit 1011 may be restricted as follows:

For example, when the rectangular ring shown in FIG. 1 is used, it can be understood that the ratio of the length of the diagonal of the outer rectangle to the wavelength of the working frequency of the antenna module 11 in the free space is greater than or equal to 0.9, and less than or Equal to 1.

If the shape and structure of the metal unit 1011 has a circumscribed circle, it can be understood that the ratio of the diameter of the circumscribed circle to the wavelength of the working frequency of the antenna module 11 in the free space is greater than or equal to 0.9 and less than or equal to 1.

In an optional embodiment, the smallest gap between any two adjacent metal units 1011 is one-tenth of the wavelength of the working frequency of the antenna module 11 in the free space.

In this embodiment, the gap between any two adjacent metal units 1011 is equal.

Further, referring to FIG. 7, FIG. 7 is a comparison diagram of the transmission power of the millimeter wave signal with the metamaterial layer and the transmission power of the millimeter wave signal without the metamaterial layer on the battery cover. As shown in Fig. 7, the vertical axis represents the transmitted power, and the horizontal axis represents the scanning angle. The solid line 701 represents the transmission power of the millimeter wave signal when the battery cover 10 is not provided with the metamaterial layer 101, and the dotted line 702 represents the transmission power of the millimeter wave signal when the battery cover 10 is provided with the metamaterial layer 101. Based on Figure 7, it can be seen that the transmission power of the millimeter wave signal is enhanced when the scanning angle is large.

The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. It should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

An electronic device including:

A battery cover, the battery cover is provided with a metamaterial layer, the metamaterial layer includes a plurality of metal units arranged in a periodic manner to form a metal unit array, and the metal unit is an array with openings metal ring;

An antenna module, the antenna module is arranged inside the battery cover, the antenna module and the battery cover are spaced apart, and the vertical projection of the antenna module on the battery cover is located on the metamaterial Within the layer.
The electronic device according to claim 1, wherein the metal unit is located between the battery cover and the antenna module, and is attached to the battery cover.
3. The electronic device according to claim 2, wherein the metamaterial layer further comprises a dielectric layer, and the dielectric layer and the battery cover sandwich the metal unit.
The electronic device according to claim 1, wherein the metamaterial layer further comprises a dielectric layer, the dielectric layer is located between the battery cover and the antenna module, and the metal unit is located in the dielectric layer .
The electronic device according to claim 1, wherein the metal unit is located in the battery cover.
The electronic device according to claim 1, wherein the metal unit is a circular ring with an opening.
7. The electronic device according to claim 6, wherein the ratio of the diameter of the metal unit to the wavelength of the working frequency of the antenna module in the free space is greater than or equal to 0.9 and less than or equal to 1.
The electronic device according to claim 1, wherein the openings of the metal units have the same orientation.
The electronic device according to any one of claims 1 to 8, wherein the vertical distance from the antenna module to the metamaterial layer is equal to a quarter of the operating frequency of the antenna module in free space wavelength.
The electronic device according to any one of claims 1 to 8, wherein the smallest gap between any two adjacent metal units is one-tenth of the operating frequency of the antenna module in the free space wavelength.