UC-EBG在微带阵列天线 RCS减缩中的应用

摘要

针对微带阵列天线的带内雷达散射截面问题，提出了一种在天线表面加载共面紧凑型光子晶体结构（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结构同向反射相位带隙随频率的变化情况。仿真结果表明：加载U C‐EBG结构后，阵列天线各个阵元的回波损耗基本保持不变，天线的增益有所增加，同时天线带内RCS最大减缩达到18dB。证实了U C‐EBG可以应用于阵列天线的带内隐身。%To solve the problem of microstrip array antenna with the radar cross section reduction ,an UC‐EBG structure is designed to load on the antenna surface to reduce the RCS by cancelling out the reflection wave .The reflection phase band‐gap changing with frequency is analyzed under different parameters .The simulated result shows that the return loss of the loaded antenna remains basically unchanged while its gain in‐creases .At the same time ,the largest reduction of antenna in‐band RCS can reach 18 dB ,which proves that UC‐EBG can be applied to microstrip array antenna to achieve in‐band stealth .