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为了提高卫星通信和雷达的信息容量与抗干扰性能,要求地面站天线多频段和变极化工作.因此,近年来发展了能圆极化工作的频率选择面,以代替极化选择面.极化选择面是由固定在介质基板上的平行细金属导线(或板条)组成的栅网.若导线间距远小于波长,它对于极化平行于导线的电波是一个良好的反射器,
In order to improve the information capacity and anti-jamming performance of satellite communications and radar, multi-band and variable-polarization operation of ground station antennas are required. Therefore, in recent years, a frequency selective plane capable of circularly polarized operation has been developed instead of the polarization selective plane The selective surface is a grid of parallel thin metal wires (or slats) fixed to a dielectric substrate .If the distance between the wires is much smaller than the wavelength, it is a good reflector for the polarization parallel to the wires,