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Triple-and Quadruple-Mode Wideband Bandpass Filter Using Simple Perturbation in Single Metal Cavity
Wong S.-W.1; Feng S.-F.1; Zhu L.2; Chu Q.-X.1
2015-10-01
Source PublicationIEEE Transactions on Microwave Theory and Techniques
ISSN00189480
Volume63Issue:10Pages:3416-3424
Abstract

This paper proposes a novel class of wideband metal cavity multiple-mode bandpass filters (BPFs), consisting of a triple-mode filter and a quadruple-mode filter. Two TE degeneration modes in a single metal cavity are excited by using an off-centered approach instead of a traditional corner-cut approach. They work together with the TM mode to constitute a three-pole wide passband with a fractional bandwidth of 30% at the central frequency of 3.2 GHz. Moreover, an off-centered metal cylinder can properly excite an extra TM mode in the passband. As such, this TM mode, TM mode, and a pair of degeneration TE modes can be simultaneously utilized to form a quadruple-mode BPF. Compared with the triple-mode BPF, the quadruple-mode BPF has better performance in term of the steepness of rejection skirt. The fractional bandwidth of this BPF can achieve up to 31%. In final, the two proposed BPFs are fabricated by using the silver plated aluminum technology. Measured S-parameter frequency response and group delay have satisfactorily matched with the simulated results.

KeywordDegeneration Modes Metal Cavity Perturbation Quadruple-mode Triple-mode Wideband Bandpass Filter
DOI10.1109/TMTT.2015.2460234
URLView the original
Indexed BySCI
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000362358200009
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Cited Times [WOS]:23   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.South China University of Technology
2.Universidade de Macau
Recommended Citation
GB/T 7714
Wong S.-W.,Feng S.-F.,Zhu L.,et al. Triple-and Quadruple-Mode Wideband Bandpass Filter Using Simple Perturbation in Single Metal Cavity[J]. IEEE Transactions on Microwave Theory and Techniques,2015,63(10):3416-3424.
APA Wong S.-W.,Feng S.-F.,Zhu L.,&Chu Q.-X..(2015).Triple-and Quadruple-Mode Wideband Bandpass Filter Using Simple Perturbation in Single Metal Cavity.IEEE Transactions on Microwave Theory and Techniques,63(10),3416-3424.
MLA Wong S.-W.,et al."Triple-and Quadruple-Mode Wideband Bandpass Filter Using Simple Perturbation in Single Metal Cavity".IEEE Transactions on Microwave Theory and Techniques 63.10(2015):3416-3424.
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