基于宽带极化转换超表面的天线RCS缩减  

Antenna RCS Reduction Based on Wideband Polarization Conversion Metasurface

作　　者：刘洁[1] 李建瀛[1] 杜彪[2] LIU Jie;LI Jianying;DU Biao(School of Electronics and Information,Northwestern Polytechnical University,Xi’an 710129,China;The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]西北工业大学电子信息学院,陕西西安710129 [2]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2022年第2期231-237,共7页Radio Engineering

基　　金：国家自然科学基金(61871324)。

摘　　要：针对天线隐身问题,设计了一款宽带极化转换超表面加载的缝隙阵列天线。超表面采用渐变L型枝节的设计方法,其极化转换比大于0.9的工作带宽为79.2%。为缩减一款2×2的H形缝隙阵列天线的雷达散射截面(Radar Cross Section,RCS),将超表面结构加载到该天线上方。对阵列天线及超表面天线分别进行了仿真和测试,超表面天线的辐射特性保持良好,同时其RCS对于垂直入射方向上的x和y极化波分别在13.4~30.5 GHz和13.1~30.7 GHz得到10.0 dB的缩减。To address the stealth problem of antennas,a wideband polarization conversion metasurface is designed for Radar Cross Section(RCS)reduction of a slot array antenna.The metasurface adopts a tapered L-shaped strip,achieving an operating frequency bandwidth of 79.2%with a polarization conversion ratio greater than 0.9.In order to reduce the RCS of a 2×2 H-shaped slot array antenna,the proposed metasurface is loaded onto the top of this antenna.The antenna and its corresponding metasurface antenna are both simulated and measured,and the results show that the radiation characteristics of the metasurface antenna is maintained good,while the RCS of the metasurface antenna is reduced by 10.0 dB under normal incidence in frequency range of 13.4~30.5 GHz for x polarized wave and 13.1~30.7 GHz for y polarized wave,respectively.

关 键 词：极化转换超表面 极化转换比 雷达散射截面 缝隙阵列天线 

分 类 号：TN82[电子电信—信息与通信工程]