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Article

Toward an Ultra-Wideband Hybrid Metamaterial Based Microwave Absorber

1
Univ Rennes, CNRS, IETR—UMR 6164, F-35000 Rennes, France
2
Faculty of Science, LEPA- CRSI, Lebanese University, EDST, Tripoli 1300, Lebanon
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(10), 930; https://doi.org/10.3390/mi11100930
Received: 4 September 2020 / Revised: 1 October 2020 / Accepted: 9 October 2020 / Published: 13 October 2020
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. View Full-Text
Keywords: hybrid absorber; metamaterial; dielectric layer; ultra-wideband absorber; anechoic chamber hybrid absorber; metamaterial; dielectric layer; ultra-wideband absorber; anechoic chamber
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MDPI and ACS Style

El Assal, A.; Breiss, H.; Benzerga, R.; Sharaiha, A.; Jrad, A.; Harmouch, A. Toward an Ultra-Wideband Hybrid Metamaterial Based Microwave Absorber. Micromachines 2020, 11, 930. https://doi.org/10.3390/mi11100930

AMA Style

El Assal A, Breiss H, Benzerga R, Sharaiha A, Jrad A, Harmouch A. Toward an Ultra-Wideband Hybrid Metamaterial Based Microwave Absorber. Micromachines. 2020; 11(10):930. https://doi.org/10.3390/mi11100930

Chicago/Turabian Style

El Assal, Aicha, Hanadi Breiss, Ratiba Benzerga, Ala Sharaiha, Akil Jrad, and Ali Harmouch. 2020. "Toward an Ultra-Wideband Hybrid Metamaterial Based Microwave Absorber" Micromachines 11, no. 10: 930. https://doi.org/10.3390/mi11100930

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