提出了一种低端吸收、高端透过型频率选择表面,该结构具有宽通带,低插入损耗,且在大角度和双极化条件下性能具有相对稳定的优点。该结构由无耗带通层和损耗层组成,无耗带通层和损耗层的基本单元分别是耶路撒冷型缝隙单元和十字开缝单元。损耗层是由集总电阻加载于相邻十字开缝单元间实现损耗吸收。进一步,基于等效电路法和全波仿真得出感应电流分布,对结构实现的功能和物理机理进行分析。在法向入射的情况下,1 dB通带带宽约为22. 16%,最低插入损耗0. 087 dB,10 dB 吸收相对带宽约为80%,最大吸收率是93. 1%。

This letter presents a low insertion loss and wide passband rasorber with lower-frequency absorption and higher-frequency transmission, and this resorber has stability performances in wide angle incidence and dual polarizations. It consists of two layerslossless bandpass layer and lossy layer. The elements of lossless bandpass layer and lossy layer are slot Jerusalem unit and slot cross unit respectively. The lossy layer realizes absorption function by resistances. These resistors of lossy layer are placed between adjacent elements. Furthermore, the functions and physical mechanism of structure are analyzed by equivalent circuit method and

TN820. 1