基于极化转换超表面的低RCS对称振子天线设计  

Design of Dipole Antenna with Low RCS Based on Polarization Conversion Meta-Surfaces

作　　者：薛宇 李长源[1] XUE Yu;LI Changyuan

机构地区：[1]中国电子科技集团公司第二十研究所,西安710068

出　　处：《现代导航》2019年第1期39-44,共6页Modern Navigation

摘　　要：本文基于极化转换超表面加载技术提出了一种具有宽带雷达散射截面(Radar Cross Section, RCS)减缩特性的对称振子天线。用极化转换超表面代替传统对称振子天线的金属反射板,在不影响天线辐射性能的前提下,实现了天线的带外RCS减缩。以对称振子天线为例进行了仿真研究,当电磁波分别以x极化和y极化方式垂直入射时,相对于传统对称振子天线,加载极化转换超表面的天线可在5～18GHz频段内实现不同程度地单站RCS减缩,其中5dB以上单站RCS减缩带宽分别为6.3～14.5GHz和5.9～14GHz。仿真结果表明加载极化转换超表面的天线在保证辐射性能基本不变的情况下,可以实现良好的带外RCS减缩性能。In this paper, a dipole antenna with broadband radar cross section ( RCS ) reduction is proposed based on the polarization conversion meta-surfaces. By replacing the traditional metal reflector with the polarization conversion meta-surfaces, the out-of-band RCS reduction is achieved without degrading the antenna radiation performance. Simulation is carried out taking a dipole antenna as an example. Results show that, compared with the RCS characteristic of the dipole antenna with metal reflector, acceptable RCS reduction can be obtained in 5-18GHz when the meta-surfaces are excited by the x-polarized / y-polarized waves in normal direction. The 5dB bandwidth of the monostatic RCS reduction is from 6.3 to 14.5GHz and from 5.9 to 14GHz for two orthogonal incident waves respectively, and good out-of-band RCS reduction is achieved with antenna radiation performance basically unchanged.

关 键 词：极化转换超表面 对称振子天线 RCS减缩 

分 类 号：TN821[电子电信—信息与通信工程]