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Miniaturized bandpass filter using dual-mode hexagonal loop resonator

Published online by Cambridge University Press:  16 January 2017

Kaijun Song ,
Yu Zhu ,
Minghua Zhao ,
Maoyu Fan  and
Yong Fan
Kaijun Song*
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China. Phone: +86 28 61830311
Yu Zhu
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China. Phone: +86 28 61830311
Minghua Zhao
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China. Phone: +86 28 61830311 National Key Laboratory of Space Microwave Technology, China Academy of Space Technology, CAST, Xi'an 710000, China
Maoyu Fan
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China. Phone: +86 28 61830311
Yong Fan
Affiliation:
EHF Key Laboratory of Science, School of Electronic Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China. Phone: +86 28 61830311
*
Corresponding author: S. Kaijun Email: ksong@uestc.edu.cn; kaijun.song@hotmail.com
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Abstract

A novel miniaturized dual-mode bandpass filter (BPF) using hexagonal loop resonator is presented. In order to reduce the circuit size, capacitive loading structure is applied to enhance the self-capacitance and electrical length of the hexagonal loop resonator. The frequency selectivity and out-of-band rejection of the proposed BPF can be improved by the two inherent transmission zeros in each side of the passband. Compared with the conventional hexagonal loop resonator without capacitive loading structure, the size of the proposed resonator is reduced by 46.6%. The simulated and measured results are presented and show good agreement.

Keywords

Bandpass filterMiniaturizedDual modeHexagonal loop resonator
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Issue 5 , June 2017 , pp. 1003 - 1008
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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References

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