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2024-10-27
Designing Fabric-Based Broadband Metamaterial Absorbers for Radar Operating Frequency Bands
By
Progress In Electromagnetics Research M, Vol. 130, 19-27, 2024
Abstract
With the increasing use of radar technology across various fields, electromagnetic pollution has become a growing concern, posing significant risks to human health. Consequently, there is a rising interest in developing wearable, flexible fabric-based absorbers that can efficiently absorb electromagnetic waves. However, the low dielectric constant of fabrics makes it challenging to achieve high absorption rates and broad bandwidth at low frequencies. To address this issue, in this study, we introduce a fabric-based broadband metamaterial absorber using felt as the dielectric substrate. The absorber features a centrosymmetric square block array design, incorporating a PU conductive film as the surface resonant material. By fine-tuning the parameters of each component in the absorber's equivalent circuit and optimizing structural parameters, the absorber achieves an extended bandwidth from 3.92 to 15.25 GHz, with a relative absorption bandwidth of 118.21%. Impressively, in the lower frequency C-band, the absorber maintains an efficiency of over 95%. The absorber was fabricated using the ``cut-transfer-paste patterning method.'' Testing results demonstrate that it is insensitive to incident angle and polarization and retains excellent absorption performance even when being bent.
Citation
Baojun Chen, Hao Yuan, Yanjie Ju, Yanbing Xue, Tianyu Jiao, Qinghua Liu, and Mengqiu Qian, "Designing Fabric-Based Broadband Metamaterial Absorbers for Radar Operating Frequency Bands," Progress In Electromagnetics Research M, Vol. 130, 19-27, 2024.
doi:10.2528/PIERM24092201
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