CN106790779B

CN106790779B - Communication equipment

Info

Publication number: CN106790779B
Application number: CN201611035512.7A
Authority: CN
Inventors: 马宁; 杨依珍; 王中帅
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2016-11-18
Filing date: 2016-11-18
Publication date: 2021-02-09
Anticipated expiration: 2036-11-18
Also published as: CN106790779A

Abstract

The present disclosure relates to a communication device, including: a body; the microphone comprises an audio acquisition part and an audio transmission part; wherein the audio transmission part is isolated from a radiation range formed by the antenna. Through the technical scheme disclosed by the invention, the noise interference of antenna radiation to the microphone can be reduced, and the communication quality of the communication equipment is improved.

Description

Communication equipment

Technical Field

The present disclosure relates to the field of terminal technologies, and in particular, to a communication device.

Background

With the increasing demands of users on the cruising ability, the sound quality level, the photographing quality, and the like of the communication equipment and the trend of the light and thin development of the communication equipment, the available space inside the communication equipment becomes more and more compact, for example, a microphone of the communication equipment has to be installed and designed in an area close to an antenna.

However, in order to support richer communication functions, the performance of the antenna is also enhanced, which results in that the radiation influence on the microphone is larger, and the radio frequency energy radiated by the antenna easily affects the microphone, thereby generating severe TDD (Time Division duplex) noise and affecting the communication quality of the communication device.

Disclosure of Invention

The present disclosure provides a communication device to solve the deficiencies of the related art.

According to a first aspect of the embodiments of the present disclosure, there is provided a communication apparatus including:

a body;

the microphone comprises an audio acquisition part and an audio transmission part; wherein the audio transmission part is isolated from a radiation range formed by the antenna.

Optionally, there is no noise reduction element associated with the microphone in the radiation range.

Optionally, the noise reduction element comprises at least one of: magnetic beads, capacitors, and electromagnetic interference filters.

Optionally, the audio transmission part is wrapped in a reference ground to be isolated from the radiation range.

Optionally, the audio transmission portion is disposed on a specific layer of the multi-layer printed circuit board, and an adjacent upper layer and an adjacent lower layer of the specific layer are both ground layers.

Optionally, the antenna and the microphone are respectively connected to different reference grounds.

Optionally, the microphone is connected to a reference ground on a main board in the body.

Optionally, a battery is disposed in the body, the antenna and the microphone are located on one side of the battery, and the main board is located on the other side of the battery.

Optionally, the microphone includes: a microphone.

Optionally, the antenna supports communication frequency bands of various types of mobile communication networks.

Optionally, the communication device includes a mobile phone.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiment, the radiation range formed by the audio transmission part of the microphone and the antenna is isolated, so that the radio frequency energy radiated by the antenna cannot influence the audio transmission of the microphone, the TDD noise generated by the radiation of the antenna to the audio transmission part is inhibited, and the communication quality of the communication equipment is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram illustrating a structure of a communication device according to an exemplary embodiment.

Fig. 2 is a schematic diagram of a noise reduction principle in the related art.

Fig. 3 is a schematic diagram illustrating a noise reduction principle according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

Fig. 1 is a schematic structural view illustrating a communication apparatus according to an exemplary embodiment, and as shown in fig. 1, in a body of the communication apparatus, a battery 1 may be provided in a middle region of the body, and other components are substantially disposed on upper and lower sides of the battery 1. For example, the main board 2 may be disposed on the upper side of the battery 1, and the antenna 31, the microphone (e.g., microphone) 32, the sound cavity 33, and the like may be disposed in the lower region 3 of the battery 1. It should be understood that: communication equipment in the related art generally adopts a device arrangement structure in the above manner; however, it is obvious that other arrangement structures can be adopted, and the technical solution of the present disclosure can be applied, and the present disclosure does not limit this.

During operation of the antenna 31, radio frequency energy generated by radiation may cause interference to the microphone 32, so that noise is included in an audio signal output by the microphone 32. In the related art, the conventional processing concept for the noise caused by the radiation of the antenna 31 is shown in fig. 2: the radio frequency energy radiated from the antenna 31 is absorbed and filtered by connecting a noise reduction element such as a magnetic bead 41, a capacitor 42, an electromagnetic interference Filter (EMI Filter)43, etc. to the microphone 32.

On the one hand, however, compared with the conventional communication device, in the communication device shown in fig. 1 of the present disclosure, the distance between the antenna 31 and the microphone 32 is smaller, so that the microphone 32 is more affected by the antenna 31; on the other hand, in order to meet higher communication requirements, for example, by increasing the communication frequency band supported by the antenna 31, the communication device may be simultaneously applied to support multiple operation network networks, so as to achieve the effects of "dual network connectivity", "full network connectivity", and the like, so that the radiation energy of the antenna 31 is stronger than that of the previous communication device, and thus, a larger radiation noise influence is caused on the microphone 32. Therefore, whether it is a theoretical analysis or a practical test, it is found that: when the noise reduction processing is performed by the filtering method in the related art as shown in fig. 2, the noise filtering amount of the noise reduction element is lower than the noise generation amount of the noise reduction element itself under the antenna radiation, that is, the noise reduction element causes the microphone 32 to generate larger TDD noise.

Therefore, the present disclosure abandons the noise reduction scheme in the related art, and proposes a new noise reduction scheme: as shown in fig. 1, the microphone 32 includes an audio acquisition portion 321 and an audio transmission portion 322, where the audio acquisition portion 321 is used for acquiring an audio signal, and the audio transmission portion 322 is used for transmitting and outputting the audio signal, and the audio transmission portion 322 may also be called a signal line, so that when the antenna 31 is in an operating state, radiation generated generally affects the audio transmission portion 322 to generate the TDD noise. Then, in the technical solution of the present disclosure, the audio transmission portion 322 may be isolated from the radiation range formed by the antenna 31, so that no matter how strong the radiation generated by the antenna 31 is, and how close the distance from the microphone 32, it can be shown that the radio frequency energy radiated by the antenna 31 affects the audio transmission portion 322, thereby achieving a good noise reduction effect. The audio transmission unit 322 is isolated from the radiation range formed by the antenna 31, and the noise reduction element in the related art is prevented from being used at the audio transmission unit 322, so that the structure complexity is reduced, the noise reduction element is prevented from generating larger noise under radiation, and the Communication quality of a GSM (Global System for Mobile Communication) network is optimized.

For example, as shown in fig. 3, when the audio transmission portion 322 transmits through a pcb (printed Circuit board) or other Circuit board, the Circuit board at least includes three Circuit layers, such as at least the first Circuit layer 51, the second Circuit layer 52 and the third Circuit layer 53 in fig. 3, then when the first Circuit layer 51 and the third Circuit layer 53 are grounded (i.e. ground or plane of reference), the audio transmission portion 322 may be disposed on the second Circuit layer 52, so that the first Circuit layer 51 and the third Circuit layer 53 may wrap the audio transmission portion 322 to isolate the radiation energy generated by the antenna 31.

Further, it was found by testing that: the rf energy radiated from the antenna 31 is transmitted to the microphone 32 through the reference ground of the antenna 31, and thereby generates TDD noise. Therefore, in the technical solution of the present disclosure, the antenna 31 and the microphone 32 may be respectively connected to different reference grounds, that is, the reference ground of the antenna 31 and the reference ground of the microphone 32 are isolated from each other, so as to avoid the radio frequency energy from being transmitted to the microphone 32 through the reference ground, and thereby the TDD noise may be prevented from being generated. For example, in an exemplary embodiment, the antenna 31 may be connected to a corresponding feed point reference ground, and the microphone 32 may be connected to a reference ground on the motherboard 2, so that the antenna 31 and the microphone 32 are respectively connected to the reference grounds at the near end and the far end, and the reference ground isolation is realized.

The technical solution of the present disclosure may be applied to various communication devices such as mobile phones and tablet devices, and the present disclosure does not limit this.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A communication device, comprising:

a body;

the microphone comprises an audio acquisition part and an audio transmission part; the audio transmission part is isolated from a radiation range formed by the antenna, the audio transmission part is wrapped in a reference ground to be isolated from the radiation range, the audio transmission part is arranged on a specific layer in the multilayer printed circuit board, and the adjacent upper layer and the adjacent lower layer of the specific layer are ground layers;

the antenna and the microphone are respectively connected to different reference grounds, and the reference ground connected with the antenna and the reference ground connected with the microphone are mutually isolated; the antenna is connected to a feed point reference ground of the antenna, and the microphone is connected to a reference ground on the main board.

2. The communication device of claim 1, wherein no noise reduction element associated with the microphone is present in the radiation range.

3. The communication device of claim 2, wherein the noise reducing element comprises at least one of: magnetic beads, capacitors, and electromagnetic interference filters.

4. The communication device according to claim 1, wherein a battery is provided in the body, the antenna and the microphone are located on one side of the battery, and the main board is located on the other side of the battery.

5. The communication device of claim 1, wherein the microphone comprises: a microphone.

6. The communication device of claim 1, wherein the antenna supports multiple types of communication bands of a mobile communication network.

7. The communication device of claim 1, wherein the communication device comprises a cellular phone.