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A low insertion loss low-pass filter based on single comb-shaped spoof surface plasmon polaritons

Published online by Cambridge University Press:  28 May 2019

Luping Li Open the ORCID record for Luping Li [Opens in a new window] ,
Lijuan Dong Open the ORCID record for Lijuan Dong [Opens in a new window] ,
Peng Chen Open the ORCID record for Peng Chen [Opens in a new window]  and
Kai Yang
Luping Li
Affiliation:
School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China Aircraft swarm intelligent sensing and cooperative control Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
Lijuan Dong
Affiliation:
School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
Peng Chen*
Affiliation:
School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China Aircraft swarm intelligent sensing and cooperative control Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
Kai Yang
Affiliation:
School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China Aircraft swarm intelligent sensing and cooperative control Key Laboratory of Sichuan Province, University of Electronic Science and Technology of China, Chengdu 611731, P. R. China
*
Author for correspondence: Peng Chen, E-mail: chenp@uestc.edu.cn
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Abstract

This paper presents a low insertion loss low-pass filter based on the spoof surface plasmon polariton (SSPP) with single comb-shape. Compared with traditional ones, the proposed filter provides lower insertion loss and return loss by optimizing the structural parameters of the mode conversion and SSPP parts. According to the measurement results, the average insertion loss of the fabricated filter is 0.41 dB and the return loss of which at the near-zero-hertz band is <−25.9 dB. The S parameter comparison result between the unoptimized and optimized filters demonstrates that the optimized filter provides lower insertion loss and return loss, smaller size, and better out-of-band rejection. The dispersion comparison result reveals the reasons behind the improved performances. The better performances of the optimized filter proves that breaking the regularity of traditional SSPP filters is beneficial to the filter's performances.

Keywords

Low-pass filterultra wideband filtersingle comb-shaped spoof surface plasmon polaritonlow insertion loss filter
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 11 , Issue 8 , October 2019 , pp. 792 - 796
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2019 

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