Dual-band filter design based on composite patch and substrate integrated waveguide structures

doi:10.3969/j.issn.0253-2778.2020.03.015

Journal of University of Science and Technology of China ›› 2020, Vol. 50 ›› Issue (3): 363-368.DOI: 10.3969/j.issn.0253-2778.2020.03.015

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Dual-band filter design based on composite patch and substrate integrated waveguide structures

LI Anran

Received:2020-01-12 Revised:2020-03-12 Accepted:2020-03-12 Online:2020-03-31 Published:2020-03-12
About author:LI Anran, male, born in 1995, Master. Research field: microwave material. E-mail: lar@mail.ustc.edu.cn

Abstract

Abstract: A new type of patch double band-pass filter based on circular substrate integrated waveguide is designed. By loading a circular metal patch, the circular SIW (circular substrate integrate waveguide, CSIW) cavity changes into the composite multilayer circular patch SIW filter. Compared to dual mode CSIW filter, composite multilayer circular patch SIW resonator not only reduces the resonant eigen mode frequency of its main mode, but also adds new modes to form a dual band. To prove its effectiveness, a simulation model is built in HFSS (high frequency structure simulator). Then through parameter optimization, the dual-band composite multilayer circular patch SIW filter is obtained. The results show that the dual-band frequency of the filter is from 1.88 GHz to 2.08 GHz and from 3.35 GHz to 3.60 GHz, and that the upper and lower sidebands of the two passbands have Transmission zeros, which shows good selectivity.

Key words: dual-band filter, magnetic wall, Composite Patches

CLC Number:

O157.4

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Dual-band filter design based on composite patch and substrate integrated waveguide structures

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