频率选择表面在前门防护中的应用

Application of Frequency Selective Surface in Front-door Protection

为了提高雷达天线的抗带外干扰能力,在传统耶路撒冷环孔的基础上,设计了一种基于基片集成波导技术的新型带通频率选择表面（FSS）。仿真计算表明：将该新型FSS加载到喇叭天线上,不仅能够保证喇叭天线在通带内正常工作,而且可以有效抑制带外的一些干扰信号,在610 GHz工作频带内的带外抑制度达到20 dB,具有良好的前门防护效果。

In order to improve the out-band interference suppression performance of radar antenna,on the basis of the traditional Jerusalem loop aperture,a new band-pass frequency selective surface（FSS） is designed based on substrate integrated waveguide（SIW）.The calculation results show that the horn antenna by covering the FSS at the aperture can not only work well at pass-band,but also suppress the interference signals at out-band and the performance of anti-interference is improved 20 dB at 6～10 GHz,excellent front-door protection performance can be achieved.