宽带低RCS超表面天线阵设计  

Design of Wideband Matasurface Antenna Array with Low Scattering Characteristics

作　　者：刘涛[1] 曹祥玉[1] 高军[1] 兰俊祥 丛丽丽[1] LIU Tao;CAO Xiangyu;GAO Jun;LAN Junxiang;CONG Lili(Information and Navigation College,Air Force Engineering University,Xi’an 710077,China)

机构地区：[1]空军工程大学信息与导航学院

出　　处：《电子与信息学报》2019年第9期2095-2102,共8页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61271100,61471389,61501494);陕西省自然科学基金(2017JM6025);博士后创新人才支持计划(BX20180375);陕西省高校科协青年人才托举计划资助项目(20170107)~~

摘　　要：该文利用电磁超表面与微带天线的结构高度相似性,设计了2种辐射特性几乎一致且具有反射相位差异的超表面天线,通过将2种天线单元进行棋盘布阵,在x极化波和y极化波照射下分别利用相位相消及匹配负载吸收实现了天线阵带内散射能量的抑制。实测与仿真结果表明:该超表面天线工作于6.0~8.5 GHz。x极化波垂直入射时天线单站RCS减缩6 dB带宽为6.2~10.5 GHz,最大减缩量达21.07 dB。y极化波垂直入射时天线的带内RCS减缩依然能达到3 dB以上。且实测与仿真结果吻合良好。该设计方法为实现天线阵带内RCS减缩提供了新的设计思路。A broadband metasurface antenna array with wideband low Radar Cross Section(RCS)is proposed.Two kind metasurface antennas with nearly the same radiation performance are designed and fabricated in a chessboard configuration.For x-polarized incidence,the reflected energy from the two elements is dissipated based on destructive phase difference.For y-polarized incidence,the incident energy is absorbed by matching load.By this means,inherent wideband low RCS is achieved for both polarizations without redundant structures.The proposed antenna array is fabricated and measured.Simulated and measured results show that the working frequency band is 6.0~8.5 GHz.Meanwhile under x polarization the antenna monostatic RCS is reduced significantly 6 dB RCS reduction is achieved over the range of 6.2~10.5 GHz and the peak reduction is up to 21.07 dB.Under y polarization the antenna monostatic RCS is reduced over 3 dB RCS reduction in bandwidth.Both measured and simulated results verify the proposed antenna array is characterized with wideband low-RCS without degrading the radiation performance.

关 键 词：阵列天线 超表面 雷达散射截面 宽频 

分 类 号：TN820[电子电信—信息与通信工程]