Substrate integrated waveguide split ring resonator-based microwave band pass filter

Abstract

The invention discloses a substrate integrated waveguide split ring resonator-based microwave band pass filter. The microwave band pass filter comprises a substrate integrated waveguide which is formed by fixing two rows of metal members on a dielectric substrate, wherein the two ends of the substrate integrated waveguide are connected with a micro-strip feed line respectively; the surfaces of both the micro-strip feed line and the substrate integrated waveguide are made of metal dielectric; the upper surface of the substrate integrated waveguide is positioned between the two rows of metal members to corrode an m*n split ring resonator array; and a row of dumbbell-shaped area bodies or dumbbell-shaped deformation areas are corroded corresponding to each line of split ring resonators on the lower surface of the substrate integrated waveguide between the two rows of metal members. The band pass filter has the advantages of out-of-band steep attenuation, small volume, light weight and high power capacity and is easy to be integrated with other planar microwave and millimeter-wave circuits, so that the band pass filter is expected to be applied to the microwave and millimeter-wave integrated circuit or a millimeter wave integrated circuit.

Description

technical field [0001] The present invention relates to a microwave filter in a microwave and millimeter-wave hybrid integrated circuit (MMIC, Microwave and Millimeter-wave Integrated Circuits) or a millimeter-wave integrated circuit (MIC), in particular to a microwave bandpass filter based on a substrate-integrated waveguide split resonant ring structure device. Background technique [0002] Microwave filter is an important microwave device in microwave engineering. It is widely used in microwave systems to pass the microwave frequency band that is allowed to pass and cut off the microwave frequency band that is not allowed to pass. [0003] Commonly used microwave filters are implemented with rectangular waveguides or microstrip lines. However, traditional design ideas often make the size of the filter device a bottleneck for development. Especially in some designs with relatively high requirements, it will be more difficult to realize it by using traditional design idea...

AI Technical Summary

Problems solved by technology

[0007] So far, no one has combined the substrate-integrated waveguide split resonator ring with the double-sided parallel stripline structure to design a microwave bandpass filter with a double-layer hollow structure.

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