A waveguide duplexer

Abstract

The invention discloses a waveguide duplexer. The waveguide duplexer comprises a cavity, and a waveguide circulator, a first waveguide filter and a second waveguide filter are arranged in the cavity. The waveguide circulator comprises first ridge waveguide, second ridge waveguide, third ridge waveguide and a ridge. One end of the first ridge waveguide, one end of the second ridge waveguide and one end of the third ridge waveguide are all connected with the ridge, the other end of the first ridge waveguide and the other end of the second ridge waveguide are communicated with the first waveguide filter and the second waveguide filter respectively, and the other end of the third ridge waveguide forms an antenna connection port in the cavity. A ridge waveguide filter is arranged between the first ridge waveguide and the first waveguide filter, and a ridge waveguide filter is arranged between the second ridge waveguide and the second waveguide filter. The waveguide circulator and the two waveguide filters are integrated to form the waveguide duplexer, so that the structure is simple; by means of high isolation of the circulator, after the two waveguide filters are cascaded, the impact of combination of the two filters can be eliminated without extra matched design at an ANT port, and therefore system cost is reduced.

Description

Technical field [0001] The invention belongs to the field of communication technology, and specifically relates to a waveguide duplexer. Background technique [0002] In the traditional radio frequency communication system architecture, the filter and the two isolators in the radio frequency front end are made separately, and finally assembled together to form a waveguide duplexer to ensure the forward low-loss transmission of useful signals in the communication system, and to prevent unwanted signals Perform the necessary attenuation to provide safety protection for the communication system circuit. When making this type of combined waveguide duplexer, the filter needs to be specially equipped with input and output waveguide ports and corresponding mounting holes, which is costly, and the corresponding isolator also needs to be equipped with mounting holes. The installed equipment is bulky. It occupies a lot of space and does not meet the design requirements of miniaturization ...

AI Technical Summary

Problems solved by technology

When making this combined waveguide duplexer, the filter needs to be specially equipped with input and output waveguide ports and corresponding mounting holes, which is expensive, and the corresponding isolator also needs to be equipped with mounting holes. After installation, the equipment is bulky. It will take up a lot of space, which does not meet the design requirements of miniaturization of communication equipment

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