Ultra-wideband polarization-insensitive and wide-angle thin absorber based on resistive metasurfaces with three resonant modes
Ultra-wideband polarization-insensitive and wide-angle thin absorber based on resistive metasurfaces with three resonant modes
复制标题
基于具有三种谐振模式的电阻超表面的超宽带偏振不敏感广角薄吸收体
DOI：
10.1063/1.4997468
复制
发表时间：
2017-08-07
影响因子：
3.2
通讯作者：
Lv, Zhiyong
中科院分区：
文献类型：
--
作者：
Li, Long;Lv, Zhiyong
本文设计、制作并实验验证了一种超材料吸收体，该吸收体由三层不同尺寸的方形阻性超材料表面组成，可实现超宽带吸收。多层阻性超颖表面不仅可以拓宽吸收带宽，而且可以基于多谐振模式调节阻抗匹配。所提出的吸收体的总厚度为3.8mm，在最低频率下仅为0.09λ。在7.0 ~ 37.4GHz范围内，吸收率大于90%的带宽约为137%。该吸收体具有良好的偏振不敏感性和宽入射角稳定性。测量结果与理论设计和数值模拟结果吻合较好。
In this paper, a metamaterial absorber is designed, fabricated, and experimentally demonstrated to realize ultra-wideband absorption, which is composed of three layers of square resistive metasurfaces with different dimensions. Multilayer resistive metasurfaces can not only broaden the absorption bandwidth but also adjust the impedance matching based on multi-resonant modes. The total thickness of the proposed absorber is 3.8 mm, which is only 0.09λ at the lowest frequency. The bandwidth of absorptivity more than 90% is from 7.0 GHz to 37.4 GHz, and the relative absorption bandwidth is about 137%. The proposed absorber has good polarization-insensitiveness and wide incident angle stability. The measured results agree well with the theoretical design and the numerical simulations.