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A dual-wideband bandpass filter using open/shorted coupled lines

Published online by Cambridge University Press:  11 September 2018

Xiao-Le Bo ,
Yong-Hong Zhang ,
Xiao-Kun Li Open the ORCID record for Xiao-Kun Li [Opens in a new window] ,
Yang Yang ,
Yin Tian  and
Yong Fan
Xiao-Le Bo
Affiliation:
EHF Key Laboratory of Science, University of Electronic Science and Technology of China, Chengdu 611731, China
Yong-Hong Zhang*
Affiliation:
EHF Key Laboratory of Science, University of Electronic Science and Technology of China, Chengdu 611731, China
Xiao-Kun Li
Affiliation:
EHF Key Laboratory of Science, University of Electronic Science and Technology of China, Chengdu 611731, China
Yang Yang
Affiliation:
Department of Microwave Technology, Sichuan Jiuzhou Electric Group Co. Ltd., Mianyang 621000, China
Yin Tian
Affiliation:
Department of Microwave Technology, Sichuan Jiuzhou Electric Group Co. Ltd., Mianyang 621000, China
Yong Fan
Affiliation:
EHF Key Laboratory of Science, University of Electronic Science and Technology of China, Chengdu 611731, China
*
Author for correspondence: Yonghong Zhang, E-mail: zhangyhh@uestc.edu.cn
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Abstract

A compact dual-wideband (DWB) bandpass filter utilizing open-shorted coupled lines (OSCL) is proposed in this paper. The introduction of the folded structure not only reduces the overall size but also contribute to the split of the transmission zero (TZ), which improves the selectivity effectively. Six transmission poles and five TZs are realized utilizing the shorted-circuit stub and OSCL. The characteristic of the flexible adjustment method of TZs guarantees an independently wide adjustable range of the bandwidth. For demonstration, a DWB filter (3 dB bandwidth 120 and 28%, respectively) is designed and fabricated. The filter is compact and has the characteristics of extraordinary wide bandwidth, low insertion loss, as well as high selectivity.

Keywords

Compactnessdual-bandpassopen-shorted coupled linesultra-wideband
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 10 , Issue 10 , December 2018 , pp. 1113 - 1117
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2018 

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