Compact multi-band transversal bandpass filters with source-load coupling

A method in designing multi-band bandpass filter is proposed in this paper. This design employs source and load cross-coupling technique and transversal structure with stub-loaded dual-mode resonators. The proposed filters are miniaturized by using stub-loaded dual-mode resonators, and half of the r...

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Bibliographic Details
Published in:Journal of electromagnetic waves and applications 2014-01, Vol.28 (2), p.184-193
Main Authors: Lai, Zhenhao, Tang, Zongxi, Zhan, Xiaowu, Cao, Xin, Wu, Yunqiu, Zhang, Biao
Format: Article
Language:English
Subjects:
filter
microwave circuit
multi-band
transversal structure
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Summary:A method in designing multi-band bandpass filter is proposed in this paper. This design employs source and load cross-coupling technique and transversal structure with stub-loaded dual-mode resonators. The proposed filters are miniaturized by using stub-loaded dual-mode resonators, and half of the resonators are reduced compared with traditional SIR filters. What is more, the dual-mode resonators and the source-load cross-coupling can introduce more transmission zeros to improve frequency selectivity. It is demonstrated by the simulated and measured results that the novel filters have the advantages of low in-band insertion loss, good out-band rejection, and compact size. This proposed filter can be applied in the microwave circuits and wireless communication systems.
ISSN:0920-5071
1569-3937
DOI:10.1080/09205071.2013.860362