一种新型二阶双频带通频率选择表面的设计

Design of New Second-order Dual-band Frequency Selective Surface

文章通过层叠三层周期性金属阵列,提出了一种具有高选择性的二阶双频带通频率选择表面结构。根据该FSS的结构建立了等效电路模型,该结构可以提供多个传输极点和传输零点。这些传输零点导致每个通带两侧都有较宽的带外抑制和快速的陡降。仿真采用CST软件实现,两个通带的中心频率分别为12.7GHz和17.4GHz,并且均有良好的频率选择特性,仿真结果表明该FSS模型拥有较高的角度稳定性与极化稳定性。

In this paper,a second-order,dual-band,band-pass frequency selective surface(FSS)with high selectivity is presented by cascading three-layers of periodic metallic arrays.An equivalent circuit model is developed based on the structure of this FSS,which can provide multiple transmission poles and transmission zeros.The simulation is implemented using full wave electromagnetic simulator CST Microwave Studio,the central fre-quencies of the two pass-bands are 12.7GHz and 17.4GHz.The simulation results show that the FSS model has high angle stability and polarization stability.