Wide-Passband Miniaturized Filter with Higher-Order Mode Suppression Using QMSIW and Microstrip Resonators.

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Bibliographic Details
Title:	Wide-Passband Miniaturized Filter with Higher-Order Mode Suppression Using QMSIW and Microstrip Resonators.
Authors:	Wang, Jingyv¹, Zeng, Haiyan¹, Su, Mengling¹, Chen, Xuan'an¹, Huang, Lishan¹, Ou, Jinming¹, Yan, Xiaohei¹ yanxiaohei@gxnun.edu.cn
Source:	Progress in Electromagnetics Research C. 2026, Vol. 166, p52-56. 5p.
Subjects:	Microstrip resonators, Substrate integrated waveguides, Transmission zeros, Resonators, Electric filters
Abstract:	This paper presents a wide-passband, miniaturized filter based on quarter-mode substrate-integrated waveguide (QMSIW) resonant cavities and microstrip resonators. The filter employs two QMSIW resonant cavities, which effectively reduce its size. Moreover, the higher-order modes TE120, TE210, and TE220 cannot propagate within these cavities. The addition of two microstrip resonators at the coupling iris between the QMSIW cavities enables a fourth-order filter response using only two resonant cavities. High selectivity is achieved through cross-coupling, which introduces two transmission zeros (TZs). The filter was fabricated and measured, showing good agreement with the simulation results. Compared with other substrate-integrated waveguide (SIW) filters, the proposed filter offers advantages in compactness, passband bandwidth, and higher-order mode suppression. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	This paper presents a wide-passband, miniaturized filter based on quarter-mode substrate-integrated waveguide (QMSIW) resonant cavities and microstrip resonators. The filter employs two QMSIW resonant cavities, which effectively reduce its size. Moreover, the higher-order modes TE120, TE210, and TE220 cannot propagate within these cavities. The addition of two microstrip resonators at the coupling iris between the QMSIW cavities enables a fourth-order filter response using only two resonant cavities. High selectivity is achieved through cross-coupling, which introduces two transmission zeros (TZs). The filter was fabricated and measured, showing good agreement with the simulation results. Compared with other substrate-integrated waveguide (SIW) filters, the proposed filter offers advantages in compactness, passband bandwidth, and higher-order mode suppression. [ABSTRACT FROM AUTHOR]
ISSN:	19378718
DOI:	10.2528/PIERC25110505