EP-4738605-A1 - ELECTRONIC DEVICE

EP4738605A1EP 4738605 A1EP4738605 A1EP 4738605A1EP-4738605-A1

Abstract

An electronic device includes a housing, a feed network, and a circuit board. The housing is provided with an accommodation cavity, and a feed post and a ground post are integrally formed in the accommodation cavity. The feed network is connected to the feed post, and is configured to feed the accommodation cavity. A ground terminal of the circuit board is connected to the ground post, and is configured to discharge static electricity on the accommodation cavity. In this application, at least a part of an area of the accommodation cavity on the electronic device is reused as a radiator, so that occupied space in the electronic device can be greatly reduced, and good antenna efficiency can be obtained. During processing and manufacturing, the feed post and the ground post are integrally formed in the accommodation cavity, thereby ensuring structural continuity, and avoiding impact on distribution of antenna resonance caused by generation of a connection gap between the accommodation cavity, the feed post, and the ground post. In addition, the ground post in the accommodation cavity is connected to the ground terminal on the circuit board, so that static electricity on the accommodation cavity can be conducted to the ground terminal on the circuit board in time through the ground post for discharge.

Inventors

LU, LIANG
ZHANG, JINGLEI
ZHANG, YUN

Assignees

Huawei Technologies Co., Ltd.

Dates

Publication Date: 20260506
Application Date: 20240913

Claims (18)

An electronic device, comprising: a housing, wherein the housing is provided with an accommodation cavity, at least a part of the accommodation cavity is provided with a metal layer, a feed post and a ground post are integrally formed in the accommodation cavity, and the feed post and the ground post are electrically connected to the metal layer; a feed network, wherein the feed network is connected to the feed post, and is configured to feed power to the metal layer through the feed post; and a circuit board, wherein a ground terminal of the circuit board is electrically connected to the ground post, and is configured to discharge static electricity on the metal layer.
The electronic device according to claim 1, further comprising a first matching circuit, wherein the ground post is electrically connected to the ground terminal by using the first matching circuit.
The electronic device according to claim 2, wherein the first matching circuit comprises a first metal part, one end of the first metal part is electrically connected to the ground post, and the other end of the first metal part is electrically connected to the ground terminal.
The electronic device according to claim 3, wherein the first metal part comprises a first connection segment, a second connection segment, and an extension segment, two ends of the extension segment are respectively connected to a first end of the first connection segment and a first end of the second connection segment so that the first metal part is C-shaped, a second end of the first connection segment is connected to the ground post, and a second end of the second connection segment is connected to the ground terminal.
The electronic device according to claim 2, wherein the first matching circuit comprises a capacitor and/or an inductor and/or a radio frequency switch.
The electronic device according to any one of claims 2 to 5, further comprising a second matching circuit, wherein the feed post is connected to the feed network by using the second matching circuit.
The electronic device according to claim 6, wherein the second matching circuit comprises a second metal part, one end of the second metal part is electrically connected to the feed post, and the other end of the second metal part is electrically connected to the feed network.
The electronic device according to claim 6, wherein the second matching circuit comprises a capacitor and/or an inductor and/or a radio frequency switch.
The electronic device according to any one of claims 1 to 8, wherein a plurality of ground posts may be disposed and spaced from each other.
The electronic device according to any one of claims 6 to 8, wherein the ground post comprises a first ground post and a second ground post, a distance between the first ground post and the feed post is less than a distance between the second ground post and the feed post, and an equivalent inductance of the first ground post is greater than an equivalent inductance of the second ground post.
The electronic device according to claim 10, wherein an equivalent inductance of the first matching circuit is less than 30 nH, and an equivalent inductance of the second matching circuit is less than 5 nH.
The electronic device according to claim 10, wherein that the end of the first metal part is electrically connected to the ground post comprises: the end of the first metal part is electrically connected to the first ground post.
The electronic device according to claim 10, further comprising a metal spring, wherein the second ground post is connected to the ground terminal by using the metal spring.
The electronic device according to any one of claims 1 to 13, wherein the accommodation cavity comprises a body and a flange, and the flange is circumferentially around and connected to an edge of the body; the flange is connected to the housing, and the body protrudes from a surface that is of the housing and that is away from the accommodation cavity; and the metal layer is disposed on a surface that is of the body and that is close to the housing.
The electronic device according to claim 14, wherein the body is made of a metal material, and the metal layer is the surface that is of the body and that is close to the housing.
The electronic device according to claim 14, wherein the body is made of a plastic material, the metal layer is a metal sheet, and the metal sheet is fastened to the surface that is of the body and that is close to the housing.
The electronic device according to claim 14, wherein the accommodation cavity is a metal camera decorative part, and the metal camera decorative part is provided with a camera opening.
The electronic device according to any one of claims 1 to 17, wherein a center frequency of a radio frequency signal fed by the feed network to the metal layer through the feed post is 1.17 GHz.

Description

The present invention claims priority to Chinese Patent Application No. 202311710584.7, filed with the China National Intellectual Property Administration on December 13, 2023 and entitled "ELECTRONIC DEVICE", which is incorporated herein by reference in its entirety. TECHNICAL FIELD This application relates to the field of communication technologies, and in particular, to an electronic device. BACKGROUND An antenna is an apparatus for receiving and sending an electromagnetic wave, and is widely used in electronic products such as mobile phones. Antennas covering different operating frequency bands have different sizes. For example, an L5 antenna has a lower frequency, a longer wavelength, and a smaller free space attenuation than an L1 antenna. However, in a mobile phone with compact internal space, the L5 antenna is large in size, and it is difficult to design an L5 antenna with good performance in limited space. SUMMARY In view of this, this application provides an electronic device, to design an L5 antenna with good performance in limited space of the electronic device. An embodiment of this application provides an electronic device, including a housing, a feed network, and a circuit board. The housing is provided with an accommodation cavity, at least a part of the accommodation cavity is provided with a metal layer, a feed post and a ground post are integrally formed in the accommodation cavity, and the feed post and the ground post are electrically connected to the metal layer. The feed network is connected to the feed post, and is configured to feed power to the metal layer through the feed post. A ground terminal of the circuit board is electrically connected to the ground post, and is configured to discharge static electricity on the metal layer. In this application, the metal layer of the accommodation cavity in the electronic device is reused as a radiator, so that occupied space in the electronic device can be greatly reduced. That is, an L5 antenna can be designed in limited space of the electronic device. In addition, the L5 antenna formed by reusing the metal layer of the accommodation cavity is an independent antenna, and does not need to share a radiator with another antenna. The L5 antenna can obtain good antenna efficiency and has better radiation performance. During processing and manufacturing, the feed post and the ground post may be integrally formed in the accommodation cavity, so that the accommodation cavity including the feed post and the ground post forms an overall structure, thereby ensuring structural continuity, and avoiding impact on distribution of antenna resonance caused by generation of a connection gap at a position at which the accommodation cavity, the feed post, and the ground post are electrically connected to each other. This facilitates configuration of an antenna with expected performance, to achieve expected radiation effect. In addition, the accommodation cavity, the feed post, and the ground post are integrally formed, to implement miniaturization of an antenna structure, ensure reliability of the structure, and facilitate assembly of the structure to the housing 1. In addition, the ground post connected to the metal layer is connected to the ground terminal of the circuit board, so that static electricity on the metal layer can be conducted to the ground terminal of the circuit board in time through the ground post for discharge, to ensure normal operation of a camera module and improve user experience. In a possible design, the electronic device further includes a first matching circuit, and the ground post is electrically connected to the ground terminal by using the first matching circuit. The first matching circuit is a circuit related to adjusting a radiation characteristic of an antenna. In an embodiment, the first matching circuit has a function of impedance matching and/or frequency tuning. In this application, more importantly, the first matching circuit may improve effect of discharging static electricity to the ground through matching impedance. In a possible design, the first matching circuit includes a first metal part. One end of the first metal part is connected to the ground post, and the other end of the first metal part is electrically connected to the ground terminal. The first metal part may be equivalent to an inductor element, so that both an electrostatic discharge requirement and an antenna performance requirement can be met. In a possible design, the first metal part includes a first connection segment, a second connection segment, and an extension segment. Two ends of the extension segment are respectively connected to a first end of the first connection segment and a first end of the second connection segment, so that the first metal part is C-shaped, a second end of the first connection segment is connected to the ground post, and a second end of the second connection segment is connected to the ground terminal. The first metal pa