基于频率选择面低雷达散射截面的波导天线设计  

The design of waveguide antenna with low radar cross section based on frequency selective surface

作　　者：何恺[1] 吕英华[1] 张金玲[1] 

机构地区：[1]北京邮电大学,北京100876

出　　处：《电波科学学报》2016年第2期243-246,共4页Chinese Journal of Radio Science

基　　金：国家自然科学基金(No.61171051)

摘　　要：设计了一种可以缩减波导缝隙天线带内雷达散射截面(Radar Cross Section,RCS)的频率选择表面(Frequency Selective Surface,FSS)结构.该结构采用人工磁导体(Artificial Magnetic Conductor,AMC)方环为基本单元,螺旋排布的方式组成FSS反射地板,波导缝隙天线作为底部馈源.为了证明该天线在带内具有良好的RCS缩减性能,采用了同等大小的金属地板作为参考天线地板进行对比.仿真计算结果表明,当入射波垂直入射天线时,天线带内RCS可达-25dB,所设计的结构具有良好的带内RCS减缩性能,同时保持了正常的天线辐射性能.We designed a frequency selective surface（FSS） structure which can reduce the radar cross section（RCS）in band of waveguide slot antenna. The structure utilized the artificial magnetic conductor （AMC）loop as the basic unit, which were formed in helical arrangement on FSS reflection board and took the waveguide slot antenna as the bottom feed. In order to prove that the antenna which has good perform- ance in RCS reduction, the same size of metal board is designed to compare with the reference antenna. The simulation results show that, when the wave vertically incident into the antenna, the RCS of antenna can achieve --25 dB, and the antenna maintains good reflective performance and normal radiation perform- ance as well.

关 键 词：雷达散射截面 波导缝隙天线 频率选择表面 

分 类 号：TN82[电子电信—信息与通信工程]