Analysis of Eighth-Mode Substrate-Integrated Waveguide Cavity and Flexible Filter Design

In this paper, a systematic research campaign on eighth-mode substrate integrated waveguide (EMSIW) filters is reported. The sizes of these EMSIW resonant cavities are only one-eighth or one-sixteenth of a conventional SIW resonant cavity. Two different coupling topologies, i.e., electric coupling a...

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Veröffentlicht in:IEEE transactions on microwave theory and techniques 2019-07, Vol.67 (7), p.2701-2712
Hauptverfasser: Wang, Xiang, Zhu, Xiao-Wei, Jiang, Zhi Hao, Hao, Zhang-Cheng, Wu, Yi-Wen, Hong, Wei
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container_title IEEE transactions on microwave theory and techniques
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creator Wang, Xiang
Zhu, Xiao-Wei
Jiang, Zhi Hao
Hao, Zhang-Cheng
Wu, Yi-Wen
Hong, Wei
description In this paper, a systematic research campaign on eighth-mode substrate integrated waveguide (EMSIW) filters is reported. The sizes of these EMSIW resonant cavities are only one-eighth or one-sixteenth of a conventional SIW resonant cavity. Two different coupling topologies, i.e., electric coupling and magnetic coupling, are employed between two EMSIW resonant cavities, which are analyzed theoretically via the response of the structure and the relationship between the cavities. Both coupling topologies enable structural variations that possess advantages and flexibility of the second-order EMSIW bandpass filters (BPFs) designing. By utilizing these basic coupling mechanisms, multilayer board technology, and other practical techniques, a class of triple-order SIW BPFs with the merits of compact size and high selectivity are demonstrated. Specifically, several triple-order EMSIW BPFs composed of pure EMSIW cavities or comprised by combining EMSIW and quarter-mode SIW cavities are simulated, fabricated, and measured for verification.
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The sizes of these EMSIW resonant cavities are only one-eighth or one-sixteenth of a conventional SIW resonant cavity. Two different coupling topologies, i.e., electric coupling and magnetic coupling, are employed between two EMSIW resonant cavities, which are analyzed theoretically via the response of the structure and the relationship between the cavities. Both coupling topologies enable structural variations that possess advantages and flexibility of the second-order EMSIW bandpass filters (BPFs) designing. By utilizing these basic coupling mechanisms, multilayer board technology, and other practical techniques, a class of triple-order SIW BPFs with the merits of compact size and high selectivity are demonstrated. 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subjects Bandpass filter (BPF)
Bandpass filters
Cavity resonators
compact size
Coupling
Couplings
eighth mode
Electric filters
Feeds
Filter design (mathematics)
Holes
Magnetic multilayers
Magnetic resonance
Microstrip
Multilayers
Selectivity
Substrate integrated waveguides
substrate-integrated waveguide (SIW)
Topology
Wave filters
title Analysis of Eighth-Mode Substrate-Integrated Waveguide Cavity and Flexible Filter Design
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