Communication cavity device and combining and distribution structure thereof

Abstract

The invention discloses a communication cavity device and a combining and distribution structure thereof. The combining and distribution structure comprises a connection piece, an impedance conversion transmission line, a resonant column and a media supporting piece. One end of the connection piece forms a public port, and the other end of the connection piece is used for being coupled with a first frequency band signal of the communication cavity device. One end of the impedance conversion transmission line is used for being connected with a second frequency band signal of the communication cavity device, the other end of the impedance conversion transmission line is connected with the connection piece, and the impedance conversion transmission line comprises at least two line sections with different impedance. The resonant column is connected with the middle of the impedance conversion transmission line in series. The media supporting piece is used for fixing the resonant column and enabling the resonant column to be insulated from a cavity of the communication cavity device. By means of the combining and distribution structure, the two frequency band signals can be well isolated to conduct combining and distribution. Further, combined with an elliptic function type low-pass filter with a specific structure, the communication cavity device can generate strong restraint out of band on the premise of guaranteeing high relative bandwidth, thereby meeting requirements of high isolation degree among communication systems.

Description

【Technical field】 [0001] The invention relates to a communication cavity device for combining multiple communication signals, which is suitable for cavity devices such as combiners, duplexers, and filters, and specifically relates to a communication cavity device used in the communication cavity device. A combination and branch structure. 【Background technique】 [0002] With the development of triple play integration and the use of LTE frequency bands, compared with traditional frequency bands, new frequency bands are moving towards lower and higher directions. With the introduction of new standards or systems, the market has higher and higher requirements for combiners, hoping to realize the combination and splitting of wider frequency band signals. However, for such a wide-band combiner, the traditional implementation method can no longer meet the requirements, and a new implementation method needs to be introduced. [0003] The patent application with publication number...

AI Technical Summary

Problems solved by technology

In the technical solution disclosed in this patent application, a band-stop filter is used to realize a broadband low-frequency signal channel. The relative bandwidth of this low-frequency signal channel can reach 200%, but its limitation is that the band-stop filter has a It is difficult to achieve sufficient rejection in a wide frequency band, so the other signal channel can only be realized by a narrowband filter to ensure sufficient passband isolation between the two channels

Therefore, the application range of this combiner is limited and cannot adapt to the new market environment

[0004] The combination of two channels with high relative bandwidth requires skill to ensure the interference-free combination of the signals of the two channels. Although the combination and splitting structure of the known combiner can meet this requirement to some extent, But it may not be able to obtain better technical indicators

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