Design of Multi-Band Terahertz Absorber with Close-Spaced Characteristic
2023 IEEE 11th Asia-Pacific Conference on Antennas and Propagation (APCAP)（2023）
Abstract
A terahertz frequency selective surface (FSS) with a six-band absorption is proposed. The structure which mainly consists of a loss layer at the top and an all-metal plate separated by a dielectric layer at the bottom has six close-spaced absorption bands at 0.88, 1.12, 1.56, 1.88, 2.16 and 2.42THz in the terahertz waves. All the peak absorbance is above 85%. Moreover, the minimum adjacent band ratio is 1.12. In addition, the proposed structure has good polarization stability. This multi-band absorber with close-spaced characteristic will be of great significance in the terahertz (THz) field.
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Key words
Multi-band Absorption,Terahertz Absorber,Absorption Band,Dielectric Layer,Minimum Ratio,Band Ratio,Minimum Band,Frequency Selective Surface,Absorption Rate,Electric Distribution,Electric Field Distribution,Small Ratio,Potential Application Prospects,Regular Ring,Regular Hexagon
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