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Double-Layer Frequency Selective Surface for Terahertz Bandpass Filter

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Abstract

A thin, low-cost, double-layer frequency-selective surface (FSS) bandpass filter has been designed, fabricated, and measured for operation in the terahertz band. The present FSS structure is composed of double-layer tin foil with a hexagonal lattice array of circular holes. A flat passband is observed with a 3-dB bandwidth of 0.20 THz from 0.81 to 1.01 THz, which is about 22% relative to the center frequency. This bandpass filter based on double-layer FSS structures achieved average insertion loss of 0.7-dB and 106.31-dB/THz band-edge steepness. We have found good agreement between theoretical calculations and experimental results.

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Funding

The authors would like to thank the support from the National Natural Science Foundation of China (No.61379024) and National Quality Infrastructure Program of China (2016YFF0200306).

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Authors and Affiliations

  1. Centre for THz Research, China Jiliang University, Hangzhou, 310018, China

    Xiong Ri-Hui & Li Jiu-Sheng

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  1. Xiong Ri-Hui
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  2. Li Jiu-Sheng
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Correspondence to Li Jiu-Sheng.

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Ri-Hui, X., Jiu-Sheng, L. Double-Layer Frequency Selective Surface for Terahertz Bandpass Filter. J Infrared Milli Terahz Waves 39, 1039–1046 (2018). https://doi.org/10.1007/s10762-018-0527-x

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  • DOI: https://doi.org/10.1007/s10762-018-0527-x

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