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Toward an ultra-wideband hybrid metamaterial based microwave absorber

Abstract : In this paper, we propose a novel design of an ultra-wideband hybrid microwave absorber operating in the frequency range between 2 GHz and 18 GHz. This proposed hybrid absorber is composed of two different layers that integrate a multiband metamaterial absorber and a lossy dielectric layer. The metamaterial absorber consists of a periodic pattern that is composed of an arrangement of different scales of coupled resonators and a metallic ground plane, and the dielectric layer is made of epoxy foam composite loaded with low weight percentage (0.075 wt.%) of 12 mm length carbon fibers. The numerical results show a largely expanded absorption bandwidth that ranges from 2.6 GHz to 18 GHz with incident angles between 0◦ and 45◦ and for both transverse electric and transverse magnetic waves. The measurements confirm that absorption of this hybrid based metamaterial absorber exceeds 90% within the above-mentioned frequency range and it may reach an absorption rate of 99% for certain frequency ranges. The proposed idea offers a further step in developing new electromagnetic absorbers, which will impact a broad range of applications. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
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Submitted on : Friday, May 28, 2021 - 10:29:01 AM
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A El Assal, H. Breiss, R. Benzerga, A. Sharaiha, A. Jrad, et al.. Toward an ultra-wideband hybrid metamaterial based microwave absorber. Micromachines, MDPI, 2020, 11 (10), pp.0930. ⟨10.3390/mi11100930⟩. ⟨hal-03002117⟩



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