A dual-band independently tunable substrate-integrated waveguide filter

Abstract

The invention discloses a substrate integrated waveguide filter with independently adjustable double bands. The substrate integrated waveguide filter comprises a resonant cavity and a perturbation body on the resonant cavity, wherein the resonant cavity comprises a ground plane, a dielectric plate, a top-layer surface and metal wall via holes; the top-layer surface and the ground plane are located at the upper part and the lower part of the dielectric plate; the metal wall via holes are distributed in the periphery of the resonant cavity in an array at equal distances to form a wall; the hole pitch between two metal wall via holes is smaller than or equal to 2.5 times of the diameter of each metal wall via hole; the perturbation body comprises a perturbation trough, perturbation metal via holes and connecting troughs; the perturbation trough is located at the center position of the top-layer surface of the resonant cavity; the connecting troughs are symmetrically arranged about the perturbation trough; the perturbation metal via holes in each resonant cavity are symmetrical about the perturbation trough and correspondingly located in the connecting troughs; and the numbers of the connecting troughs and the perturbation metal via holes are even numbers. The SIW filter with the independently adjustable double bands has the advantages of being simple in structure, relatively large in return loss, independently adjustable in double bands and simple in operation.

Description

Technical field [0001] The present invention relates to a dual-band independently adjustable substrate integrated waveguide filter. Specifically, it relates to a wireless communication system that needs to switch filters in different frequency bands at any time, and belongs to the technical field of microwave transmission devices. Background technique [0002] At present, multi-frequency bands and real-time adjustable frequency bands provide effective solutions for radio frequency / microwave / terahertz transceivers to overcome the problem of effective utilization of wireless communication with crowded spectrum. Filters are the key modules of wireless transceiver systems, and multi-band or real-time adjustable-band filters need to have multi-functional integrated features to meet future applications of spectrum in telecommunications and the Internet. [0003] Recently, there are mainly two types of SIW-based tunable / reconfigurable filters: 1) electrically tunable filters and 2) mechan...

AI Technical Summary

Problems solved by technology

The above-mentioned method will make the circuit complex, high-cost multi-layer structure, in addition, it can only generate a single frequency band, and control the movement of a frequency band

And the document "Dual-band Dual-mode Substrate Integrated Waveguide Filters with Independently Reconfigurable TE 101 "Resonant Mode" is simple in structure, easy to operate, and has two frequency bands. However, this document can only realize that one frequency band can be adjusted, while the other frequency band does not change.

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