基于UC-EBG的微带天线RCS减缩方法

RCS Reduction of the Microstrip Antenna Based on UC-EBG

针对微带天线的带内雷达散射截面减缩问题,提出了一种在天线表面加载共面紧凑型电磁带隙结构(UC-EBG),通过散射对消,实现天线雷达散射截面(RCS)减缩的方法。分析了在不同参数下UC-EBG结构同相反射相位带隙随频率的变化情况。仿真和实测结果表明:加载UC-EBG结构后,天线带内RCS得到了很大减缩,最大减缩达到了14dB,同时微带天线回波损耗基本保持不变,天线的增益不仅未受影响而且有所增加。证实了UCEBG可以很好地应用于微带天线的带内隐身。

To solve the problem of microstrip antenna with the radar cross section reduction,an UC-EBG structure was designed to load on the antenna surface to reduce the RCSby canceling out the reflection wave.The reflection phase band-gap changing with frequency was analyzed with different parameters.The simulated and experimental results show that the in-band RCSof antenna has been greatly reduced and the largest reduction can reach 14 dB.At the same time,the return loss of the loaded antenna remains basically unchanged whereas its gain increases,which proves that UC-EBG can be applied to microstrip array antenna to achieve in-band stealth well.