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 technical field of communication, and in particular relates to a waveguide duplexer. Background technique [0002] In the traditional RF communication system architecture, the filter and the two isolators at the RF front-end are manufactured separately, and finally assembled together to form a waveguide duplexer, which ensures that useful signals in the communication system are transmitted forward with low loss, and at the same time protects unwanted signals Perform necessary attenuation to provide safety protection for communication system circuits. 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 and does not meet the design requirements for ...

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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