Quad-band THz frequency selective surface based on a split ring resonator loaded with multiple slots

Dongju Kim, Jeong Min Woo, Hyun-Woong Kim and Jae-Hyung Jang

Journal of Electromagnetic Waves and Applications, 2015, vol. 29, issue 18, 2472-2478

Abstract: A quad-band terahertz (THz) frequency selective surface with bandstop response is designed, fabricated, and characterized. The unit cell of the filter consists of a split ring resonator (SRR) and surrounding four groups of slots. Each group of slots has three slots with different lengths. The lowest frequency band is determined by the resonance of the SRR and the other three upper bands are selected by the resonance of the slots which exhibit bandstop characteristics rather than bandpass characteristics. The filter transformation characteristic originates from the slits placed between the unit cells which act as series-connected capacitive components. The fabricated quad-band THz filters exhibited bandstop characteristics with attenuation higher than 20 dB in all the operating frequency bands.

Date: 2015
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DOI: 10.1080/09205071.2015.1053576

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