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Genetic algorithm guided design of gradient multilayer metamaterial for ultra broadband and wide angle electromagnetic wave absorption
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DOI：10.1088/1361-6463/ae5ddb.png)
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Abstract
En 中文
This paper presents a genetic algorithm-driven design of a gradient multilayer pyramid metamaterial absorber for ultra broadband and wide-angle electromagnetic wave absorption. The proposed structure evolves from a conventional stepped pyramid into an optimized five-layer frustum configuration, enabling continuous impedance matching across a broad frequency range. Under normal incidence, the absorber based on composite comprising carbonyl iron particles (CIP) and polyamide achieves an effective absorption bandwidth spanning 2.8-40 GHz, corresponding to a relative bandwidth of 173.8%. Angularly, it maintains stable performance for wide incident angles up to 60 degrees. The broadband and angularly robust absorption is attributed to complementary layer-wise impedance matching and spatially distributed dissipation mechanisms. Full-wave simulations, supported by experimental validation using 3D-printed samples, confirm the design's effectiveness and manufacturability. Radar cross section analysis further indicates significant scattering reduction, highlighting its potential in practical applications such as radar stealth, camouflage, and electromagnetic interference shielding.
Keywords:
metamaterial absorber
genetic algorithm
broadband andwide angle absorption
impedance matching
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3.2
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2.6W
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4.9W
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