Design of ultra-wideband absorbing metasurface driven by genetic algorithm via gradient impedance matching Article Swipe
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· 2025
· Open Access
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· DOI: https://doi.org/10.1364/oe.576551
· OA: W4415096995
To address the urgent demand for broadband electromagnetic wave absorption in modern devices, this study proposes an innovative design method for ultra-wideband absorbing metasurfaces, based on the impedance matching principle and driven by a genetic algorithm. Targeting the requirement of over 90% electromagnetic wave energy absorption across the entire L-Ku (1-18 GHz) band, the core concept involves intelligently optimizing the spatial arrangement of discrete resistive film patterns within a multi-layer structure using GA to achieve fine-tuned impedance matching over a broad bandwidth. This method overcomes the limitations of traditional design approaches, which rely heavily on experience and struggle to efficiently solve broadband matching problems. Notably, the absorber achieves a thickness reaching 90% of Rozanov's theoretical limit thickness while exhibiting low areal density, demonstrating significant application potential in areas such as microwave stealth and electromagnetic compatibility.
