Wideband square spiral metamaterial absorbers based on flaky carbonyl iron/epoxy composites

Ruey-Bin Yang; Jyun Jhih Yang; Shen Tee Lo

doi:10.1063/1.5130470

AIP Advances (Jan 2020)

Wideband square spiral metamaterial absorbers based on flaky carbonyl iron/epoxy composites

Ruey-Bin Yang,
Jyun Jhih Yang,
Shen Tee Lo

Affiliations

Ruey-Bin Yang: Department of Aerospace and Systems Engineering, Feng Chia University, Taichung 40724, Taiwan
Jyun Jhih Yang: Department of Aerospace and Systems Engineering, Feng Chia University, Taichung 40724, Taiwan
Shen Tee Lo: Department of Aerospace and Systems Engineering, Feng Chia University, Taichung 40724, Taiwan

DOI: https://doi.org/10.1063/1.5130470
Journal volume & issue: Vol. 10, no. 1
pp. 015141 – 015141-4

Abstract

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A broadband and thin microwave absorber composed of metal-base planar metamaterials (MMs) sandwiched between two layers of flaked-shaped carbonyl iron (FCI) composites is presented. FCI powder was prepared by ball milling spherical carbonyl iron powder and then added to epoxy resin to prepare FCI composite (FCIC) samples with different weight fractions. With these electromagnetic characteristics, a broadband, polarization-insensitive and thin metamaterial absorber comprising of arrays of square spirals embedded between two different layers of FCIC is optimally designed through a genetic algorithm. The reflection loss of the measured square spiral MM absorber with a thickness of 3.4 mm can reach –26 dB at matching frequency 4.4 GHz and the absorbing bandwidth below –9.3 dB is covered from 3.6 to 18.0 GHz which almost 4 fourfold bandwidth compared to that of the FCIC without the incorporation of MM layers.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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