具有极化选择特性的超材料频率选择表面的设计

摘要

Two kinds of frequency selective surfaces with polarization selective characteristics are proposed in this paper.According to the design method of metamaterial,frequency selectivity capability can be achieved by the combination of continuous conducting wire and cut-wire whose effective permittivity is Lorentz-type.By different dimensions and structures in the x-axis and the y-axis of frequency selective surface unit cells,the passband properties for TE and TM waves are separated,so a polarization selective surface in GHz band can be achieved.The design method demonstrates the feasibility of metamaterial frequency selective surface and is of great reference value in fabricating polarization filter and polarization wave generator of specified frequency.%基于超材料结构的设计理论,通过长金属线周期阵列和具有Lorentz谐振形式等效介电常数的金属短线的组合可频率选通特性.由不同周期排布和结构尺寸的长金属线和金属短线组合而成的频率选择表面具有不同频段的选通特性.文章提出了双层及单面两种具有极化选择特性的频率选择表面,两种结构均可实现对特定频段TE及TM波选通.具有极化选择特性的超材料频率选择表面的设计为极化滤波器以及极化波产生器的设计提供了借鉴.