Antenna filtering circuit in electronic terminal, antenna filtering method and electronic terminal

Abstract

The invention provides an antenna filtering circuit in an electronic terminal, an antenna filtering method and an electronic terminal. A metal frame of the electronic terminal is divided into at leasttwo parts through at least one slit. Each of the at least two parts is made into an independent antenna, so that at least two antennas are formed. Any one of the at least two antennas is determined as a target antenna. The antenna filtering circuit includes a multi-channel changeover switch and a plurality of filters, wherein a first connection end of the multi-channel changeover switch is connected to a first predetermined position of an antenna adjacent to the target antenna, a second connection end of the multi-channel changeover switch can be connected to first ends of the different filters, and a second end of each filter is grounded. By adopting the antenna filter circuit in an electronic terminal, the antenna filtering method and the electronic terminal in the exemplary embodimentof the invention, the isolation degree between adjacent antennas can be increased, the mutual coupling effect between adjacent antennas can be reduced, and the overall radiation performance of antennas can be improved.

Description

technical field [0001] The present invention generally relates to the field of antenna design, and more specifically, relates to an antenna filter circuit in an electronic terminal, an antenna filter method, and an electronic terminal including the antenna filter circuit. Background technique [0002] Existing mobile terminals using a metal frame can use the metal frame as a part of the antenna, and separate antennas with different functions through slits (such as figure 1 shown). Due to the tight distance between the antennas, there is mutual coupling between adjacent antennas, resulting in the degradation of the radiation performance of the target antenna due to the influence of adjacent antennas. [0003] At present, the following methods are usually used to improve the antenna isolation: [0004] (1) Add a grounding point on the adjacent antenna of the target antenna (such as figure 2 shown) to play an isolation role. [0005] (2) Increase the gap width of the metal...

AI Technical Summary

Problems solved by technology

[0007] However, in this way, debugging is more difficult, and the processing of interference sources may not achieve the expected effect

In addition, due to the limitation of mobile terminal space and circuit board layout and wiring, the selection of grounding position also has certain limitations.

Images