介质对厚屏频率选择表面传输特性的影响

摘要

In this paper, a thick-screen FSS with circle-hole elements is designed. Based on the moment method, its transmission properties for different thick metallic screen with and without filling dielectrics are analyzed and simulated. It can be seen from results that the thick-screen frequency selective surface without filling dielectrics has stable the cen-ter frequency and its bandwidth narrows as increasing the thickness of metallic screen. In addition, with increasing the thickness of metallic screen the center frequency drifts to the low frequency and the bandwidth is decreased.%本文设计了圆孔单元的厚屏FSS，采用矩量法进行理论研究和仿真，通过不同厚度的金属屏在介质填充前与填充后的传输特性对比发现：无介质填充时，厚屏FSS具有稳定的中心频率，而带宽随金属屏厚度增大变窄；填充介质后，中心频率随金属屏厚度增大向低频漂移，带宽减小。