New low-pass filter path and communication cavity device using it

Abstract

The invention discloses a novel low-pass filter path and a communication cavity device using the same. The novel low-pass filter path includes a metal cavity and a cover plate covering the metal cavity. There are connected sub-cavities, and connection windows are provided between two adjacent sub-cavities. A conductor rod is arranged in the metal cavity to pass through the connected sub-cavities in sequence. On the conductor rod corresponding to each connection window, there is a The cover plate exposes the resonant rod of the rod body. There are threaded holes corresponding to the above resonant rods on the cover plate. A group of tuning screws with mounting holes inside pass through the threaded holes and go deep into the cavity to capacitively couple with the corresponding resonant rod. The hole is covered with a medium sleeve. The novel low-pass filter channel and the communication cavity device using it in the present invention have excellent electrical indicators, can be tuned externally and are convenient for processing and mass production, and the communication cavity device using the channel can generate Strong suppression to meet the high isolation requirements between communication systems.

Description

technical field [0001] The invention relates to a communication cavity device for performing low-pass filtering on communication signals, in particular to a novel low-pass filter path that can be tuned externally and a communication cavity device using the path structure, such as filters, combiners and Diplexer. 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 developing in two directions: lower and higher. With the introduction of new standards or systems, the market has higher and higher requirements for passive components. [0003] As passive communication devices, combiners, duplexers and filters are widely used in the field of communication, especially in the field of radio frequency communication. With the addition of TV systems and video-on-demand systems to communication system channels, a high-performance low-pass filter is required. ...

AI Technical Summary

Problems solved by technology

[0004] For low-pass filters, the traditional implementation is generally Chebyshev type, such as the common candied fruit-shaped low-pass filter, which has the advantages of simple structure and easy implementation, but the disadvantage is that the out-of-band decline is slow and the out-of-band rejection The consistency of low and filtering characteristics depends on the precision of processing and assembly

Such a low-pass filter is often used to suppress the far-end out-of-band, and in general, it cannot meet the requirements of high isolation between actual systems

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