Second-Order Tri-Band Frequency Selective Surface with High Selectivity

摘要

In this paper, a tri-band frequency selective surface (FSS) with second-order response is presented by cascading a two-layer periodic array. The proposed FSS provides three pass-bands that are separated from one another by two transmission zeros, leading to a highly selective response. Each pass-band contains two transmission poles, which results in a broad and flat band performance. The central frequencies of three pass-bands are 5.5GHz, 8.7GHz, 11.7GHz and the corresponding bandwidths are 1.0GHz, 1.3GHz, 0.7GHz, respectively. The simulation is implemented using full wave electromagnetic wave simulator CST Microwave Studio, and the operating principle is also described. Furthermore, the FSS has the merits of polarization insensitivity and incident angle stability.