Ultra-wide bandstop filter based on nested square resonant ring

Yuqian Cai; Baichuan Yao; Xinyu Hu; Bin Li

doi:10.1117/12.2587191

2 December 2020 Ultra-wide bandstop filter based on nested square resonant ring

Yuqian Cai, Baichuan Yao, Xinyu Hu, Bin Li

Proceedings Volume 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics; 1171721 (2020) https://doi.org/10.1117/12.2587191
Event: 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 2020, Shanghai, China

Abstract

A nested resonant ring structure composed of double split square ring based on frequency selective surface (FSS) is proposed to realize ultra-wide bandstop filter. To begin with, the structure is supposed by a single layer, adding the number of resonant rings and metal-dielectric layers to adjust frequency points and bandwidth. Through numerical simulation, we found that the location of the frequency points depended on horizontal nested rings and the transmission coefficient improved by multiply layers. In order to enhance the flatness of stopband, the depth and size of slots are calculated, showing 1.72THz stop-band from 1.27THz to 2.99THz. The result demonstrates that the range of bandwidth achieve 1.5THz with transmission depth up to 20dB, and flat bandstop as well as out-band rejection are well-performed compared with traditional slot structure.

Citation Download Citation

Yuqian Cai, Baichuan Yao, Xinyu Hu, and Bin Li "Ultra-wide bandstop filter based on nested square resonant ring", Proc. SPIE 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 1171721 (2 December 2020); https://doi.org/10.1117/12.2587191

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