遺伝子アルゴリズムによる勾配インピーダンス整合駆動超広帯域吸収メタサーフェスの設計

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.