Single-Layer Substrate-Integrated Waveguide Inline Filters With Flexible Transmission Zeros

This letter presents a novel class of single-layer substrate-integrated waveguide (SIW) inline filters with flexible transmission zeros (TZs). The basic structure is an oversized half-mode SIW (HMSIW) rectangular cavity (RC) perturbed by a pair of metallic via-holes or an open-ended slotline. Each p...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 32; no. 6; pp. 495 - 498
Main Authors Zhu, Fang, Wu, Yunfei, Chu, Peng, Luo, Guo Qing, Wu, Ke
Format Journal Article
LanguageEnglish
Published IEEE 01.06.2022
Subjects
Couplings
Half-mode substrate-integrated waveguide (HMSIW)
inline filters
Microwave filters
Passband
rectangular cavities (RCs)
Resonator filters
Resonators
Substrates
transmission zeros (TZs)
Wireless communication
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Summary:This letter presents a novel class of single-layer substrate-integrated waveguide (SIW) inline filters with flexible transmission zeros (TZs). The basic structure is an oversized half-mode SIW (HMSIW) rectangular cavity (RC) perturbed by a pair of metallic via-holes or an open-ended slotline. Each perturbed HMSIW RC can provide one pole and two TZs. By changing the distance between the perturbation via-holes or the length of the perturbation slotline, one TZ can be moved either above or below the passband, while the other is always located above the passband. Based on these perturbed HMSIW RCs, two SIW three-pole inline filters are fabricated and measured to validate the design concept.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2022.3141994