Compact Dual-Mode Bandpass Filters Based on Half-Mode Substrate-Integrated Waveguide Cavities

This letter presents a novel class of compact dual-mode bandpass filters based on half-mode substrate-integrated waveguide (HMSIW) cavities. By using both TE 102 and TE 301 modes of the HMSIW rectangular cavity as resonant modes and TE 101 mode as nonresonating mode, a novel HMSIW doublet with two p...

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Bibliographic Details
Published inIEEE microwave and wireless components letters Vol. 31; no. 5; pp. 441 - 444
Main Authors Zhu, Fang, Luo, Guo Qing, Liao, Zhen, Dai, Xi Wang, Wu, Ke
Format Journal Article
LanguageEnglish
Published IEEE 01.05.2021
Subjects
Band-pass filters
Bandpass filters
dual-mode
Filtering theory
half-mode substrate-integrated waveguide (HMSIW)
Microwave filters
Passband
Resonator filters
Substrates
transmission zeros (TZs)
Wireless communication
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Summary:This letter presents a novel class of compact dual-mode bandpass filters based on half-mode substrate-integrated waveguide (HMSIW) cavities. By using both TE 102 and TE 301 modes of the HMSIW rectangular cavity as resonant modes and TE 101 mode as nonresonating mode, a novel HMSIW doublet with two poles and two transmission zeros (TZs) is implemented. The TZs can be located at one side or both sides of the passband. Therefore, flexible responses can be obtained. A two-pole HMSIW filter with asymmetric response and a four-pole HMSIW filter with quasi-elliptic response have been designed, fabricated, and measured, to demonstrate and verify the proposed structure. Compared with substrate-integrated waveguide (SIW) counterparts, the dual-mode HMSIW filters have the advantage of smaller size.
ISSN:1531-1309
1558-1764
DOI:10.1109/LMWC.2021.3066569