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Design and optimization of ultra-wideband planar multilayer absorber based on long-carbon fiber-loaded composites

Abstract : This article presents a strategy for designing optimal microwave planar multilayer absorbers based on epoxy foam composites loaded with carbon fibers of 12 mm length. Firstly, the impedance gradient principle (gradual loaded composites) was adopted to realize two multilayer absorbers, of 125 mm thickness, using slightly loaded composites (0.0125 wt% < CFs < 0.075 wt%) and relative highly loaded composites (0 wt% < CFs < 0.4 wt%), respectively. The simulation of these absorbers shows that composites with very low CF rates are sufficient to achieve a very close absorption performance and bandwidth to that of the commercial absorber, in the entire studied frequency range (0.75-18 GHz). Secondly, the genetic algorithm optimizer is used to achieve a multilayer absorber that presents the best compromise between absorption performance and thickness. Different CF-loaded composites and layer thicknesses are therefore tested; a multilayer absorber with a total thickness of 98 mm is then proposed. This absorber shows a better reflection coefficient and a better compromise (absorption/total thickness) than that of the commercial absorber, while presenting a reduction of 22% in thickness. The presented simulation and measurement results confirm that a judicious choice of the composition and the thickness of each layer is necessary to optimize the absorption performance of a planar multilayer absorber. This paper also shows the advantage of using an optimizer to improve the absorption performance while reducing the total thickness of the absorber.
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Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Thursday, December 16, 2021 - 4:17:17 PM
Last modification on : Wednesday, April 27, 2022 - 4:19:06 AM
Long-term archiving on: : Thursday, March 17, 2022 - 7:29:13 PM


Aicha EL assalDesign and optim...
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Aicha El Assal, Hanadi Breiss, Ratiba Benzerga, Ala Sharaiha. Design and optimization of ultra-wideband planar multilayer absorber based on long-carbon fiber-loaded composites. Journal of Materials Science, 2021, 56, pp.19484-19500. ⟨10.1007/s10853-021-06453-5⟩. ⟨hal-03367468⟩



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