Fast Design of Ultrawideband Absorbers Based on Equivalent Circuit Model

A fast method is presented for designing ultra-wideband absorbers composed of resistive surfaces (RSs), substrates and metallic plates. A general effective permittivity for RSs printed on stratified dielectrics under considering metallic plate is derived to obtain the closed-form relationships betwe...

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Bibliographic Details
Published in:IEEE antennas and wireless propagation letters 2024-06, Vol.23 (6), p.1869-1873
Main Authors: Kong, Xianglin, Zhang, Shengjun, Pang, Xiaoyu, Fu, Yixiang, Zhao, Lei, Shen, Zhongxiang
Format: Article
Language:English
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Summary:A fast method is presented for designing ultra-wideband absorbers composed of resistive surfaces (RSs), substrates and metallic plates. A general effective permittivity for RSs printed on stratified dielectrics under considering metallic plate is derived to obtain the closed-form relationships between resistance, capacitance and absorber parameters. An equivalent circuit (EC) is developed for absorbers to combine with a genetic algorithm to quickly achieve an optimal value of lumped elements, thereby calculating absorber parameters. Utilizing the proposed approach, an absorber within 0.64-41.7 GHz with a reflection loss lower than −10 dB is obtained efficiently. The close match between the EC model and full-wave simulation results shows the accuracy of the proposed approach. To further verify the proposed method, a 1.16-19.2 GHz absorber was designed and manufactured, and the measurements agreed well with the EC and full-wave simulations.
ISSN:1536-1225
1548-5757
DOI:10.1109/LAWP.2024.3371930