Plane lossy filter of hybrid structure

Abstract

The invention discloses a plane lossy filter of a hybrid structure. A micro-strip resonator and a substrate integrated waveguide resonator which are in bilateral symmetry are arranged, an input-output micro-strip line is respectively connected to the micro-strip resonator and the substrate integrated waveguide resonator through a first input-output micro-strip connecting line and a second input-output micro-strip connecting line, and the micro-strip resonator and the substrate integrated waveguide resonator are connected with an output micro-strip line of the lossy filter through the first input-output micro-strip connecting line and the second input-output micro-strip connecting line; the micro-strip resonator, the first input-output micro-strip connecting line, the second input-output micro-strip connecting line and the input-output micro-strip line are all printed on a dielectric substrate; the substrate integrated waveguide resonator is composed of substrate integrated waveguide earthing holes in the dielectric substrate and copper with which the upper portion and the lower portion of the dielectric substrate are covered. The plane lossy filter is easy to machine and low in cost, is of a plane structure, free of cross resistive coupling and is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of microwave lossy filters, in particular to a planar lossy filter in which substrate integrated waveguide technology and microstrip line technology are mixed. Background technique [0002] With the rapid development of modern wireless communication, high-performance microwave filters are widely used in broadband communication systems, especially in communication satellites, ground stations, wireless base stations and other occasions. As a kind of high-performance microwave filter, lossy filter will be paid more and more attention. During the design process of microwave filters, designers will find that the realization of a high-performance filter often requires a high-Q microwave resonator. Once the material and shape of the resonator are determined, the Q value of the resonator is constrained. In order to improve the Q value, the designer must increase the size of the resonator, which also leads to an in...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the embodiments of the present invention is to provide a planar lossy filter with a hybrid structure, which aims to solve the problems of complex structure, high cost and relatively large bandwidth in the existing lossy filter

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