双屏带阻频率选择表面的反射特性研究

摘要

设计了一种十字单元的带阻型双屏频率选择表面,并采用谱域法对其进行仿真研究.给出了中心频率及其反射系数随单元周期、入射电磁波的角度、介质厚度和介电常数的变化规律,为带阻型频率选择表面在天线副反射面中的应用提供设计依据.%A double screen band—stop frequency selective surface with a cross unit is designed and its reflection charac-teristics is simulated by means of spectral domain method. The variations of center frequency and reflection coefficient with the cell cycle, the incident angle of the electromagnetic wave and the dielectric thickness and constant are given. In the field of antenna subreflector, the results of these studies provide theoretical support for application of band—stop frequency selection surface