Waveguide filter with built-in isolator

Abstract

The invention discloses a waveguide filter with built-in isolators. The waveguide filter comprises a cover plate and a cavity, wherein the cover plate and the cavity are buckled together. The waveguide filter is characterized in that: a plurality isolators are arranged in the cover plate and the cavity; each isolator comprises a first isolator magnetic field cavity and a second isolator magnetic field cavity which are symmetrically arranged on the upper surface of the cover plate and the lower surface of cavity and are used for placing permanent magnets; a first metal matching block and a second metal matching block are arranged between two isolator magnetic field cavities; and a ferrite is placed between the two metal matching blocks. The isolators are integrated in the waveguide filter, so that the isolation degree of the waveguide filter is improved, and the performance of the waveguide filter is high; and the thicknesses of the cover plate and the cavity are increased, and the thickness difference is not more than 10 percent of the thickness of the cavity, so that the hidden trouble of temperature distortion of devices is avoided, and the reliability and the stability of the devices are improved.

Description

technical field [0001] The invention relates to the technical field of filtering of digital microwaves and other microwaves, in particular to a waveguide filter with a built-in isolator for digital microwaves and other microwaves. Background technique [0002] In order to obtain better isolation, the traditional waveguide filter used for digital microwave and other microwaves requires an external isolator, which is not conducive to the miniaturization and integration requirements of the device, and the connection between the isolator and the waveguide filter will Cause a certain mismatch and affect the performance of the waveguide filter. At the same time, the thickness of the cavity and the cover plate of the traditional waveguide filter is too thin, which is easy to cause thermal deformation. Contents of the invention [0003] In order to solve the problem that the traditional waveguide filter requires an external isolator, which will affect the performance of the waveg...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the traditional waveguide filter requires an external isolator, which will affect the performance of the waveguide filter, and is not conducive to the miniaturization and integration of the device, the present invention provides a method that integrates the isolator into the waveguide filter The waveguide filter with built-in isolator improves the isolation of the waveguide filter and has good performance. The cover plate and cavity of the waveguide filter are thickened and the thickness difference is less than 10% of the cavity thickness, avoiding the hidden danger of thermal deformation of the device , improving device reliability and stability

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