本文選題：超材料 + 吸波器��； 參考：《微波學報》2017年06期

【摘要】：提出了一種基于集總電阻的S波段小型化超材料吸波器(Metamaterial Absorber,簡稱MMA)結構,并進行了理論分析和仿真驗證。設計的MMA基本單元結構由加載了集總元件的電諧振器、中間隔離層和金屬背板組成。利用S參數(shù)反演算法求出等效阻抗,結果表明集總電阻的加入使該MMA在較寬頻帶范圍內有較好的阻抗匹配特性。根據等效電路理論,分析了MMA諧振吸收頻率與其單元結構幾何參數(shù)之間的關系。通過MMA單元結構表面電流和能流分布分析了其吸波機制。不同模式下的極化角和斜入射角吸收率表明:該MMA具有極化不敏感和寬入射角特性。進一步研究MMA結構-參數(shù)對其吸波性能的影響,通過單元結構幾何參數(shù)和集總參數(shù)的調節(jié)獲得最優(yōu)的MMA模型。最終,通過MMA基本單元結構的進一步優(yōu)化設計,使其在1.9~6.0GHz范圍內吸收率達到90%以上,對應的相對帶寬達到101.9%。該設計有望在電磁能量捕獲及隱身領域擁有潛在應用價值。
[Abstract]:A novel S-band miniaturized hyper material absorber (MMA) structure based on lumped resistor is proposed, and the theoretical analysis and simulation results are given. The MMA basic unit structure is composed of an electric resonator with lumped elements, an intermediate isolation layer and a metal backplane. The equivalent impedance is obtained by using the S-parameter inversion algorithm. The results show that the addition of lumped resistance makes the MMA have a better impedance matching property in a wide frequency range. Based on the equivalent circuit theory, the relationship between the resonant absorption frequency of MMA and the geometric parameters of its unit structure is analyzed. The absorbing mechanism of MMA cell structure is analyzed by the surface current and energy flow distribution. The absorption rates of polarization angle and oblique incident angle at different modes show that the MMA is polarization-insensitive and has wide incidence angle. The influence of structure parameters on the absorbing performance of MMA is further studied. The optimal MMA model is obtained by adjusting the geometric parameters and lumped parameters of the element structure. Finally, through the further optimization design of MMA basic unit structure, the absorptivity of MMA is over 90% in the range of 1.9GHz and the relative bandwidth is 101.9%. The design is expected to have potential applications in electromagnetic energy capture and stealth.
【作者單位】： 武漢科技大學信息科學與工程學院;華中科技大學光學與電子信息學院;
【基金】：國家自然科學基金聯(lián)合重點項目(U1435209);國家自然科學基金青年項目(61605147) 湖北省自然科學基金面上項目(2017CFB588) 武漢科技大學青年科技骨干培育計劃(2016xz010);武漢科技大學大學生科技創(chuàng)新基金(16ZRA125)
【分類號】：O441;TB33

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