结构型吸波材料在阵列天线RCS减缩中的应用

天线雷达散射截面(RCS)减缩时需要保证天线的基本辐射性能，这使得其带内的RCS控制变得十分困难．为此，提出了利用结构型吸波材料实现阵列天线的带内RCS减缩．结构型吸波材料由矩形金属贴片和相邻贴片之间的加载电阻构成，阵列天线为1×4的微带贴片天线阵，并将吸波材料排列在阵列天线单元之间．仿真和实测结果表明，当阵列单元之间加入结构型吸波材料后，阵列天线的辐射性能基本保持不变，阵列天线的带内RCS能获得9dB以上的减缩．

Radar absorbing material applied to the RCS reduction of array antennas

The radiation performance of an antenna must be ensured when reducing the antenna radar cross section(RCS),which makes it difficult to control the in-band RCS.For this reason,this paper presents a radar absorbing material(RAM) applied to reduce the in-band RCS of the array antenna.The structure of the RAS is based on the square patch structure loaded with lumped resistances.An array with four patch elements is designed,and the RAM is located between two adjacent patch elements.Simulated and measured results show that the radiation performance of the array antenna is preserved when RAS is used.At the working frequency the RCS of an array antenna with RAM can be reduced more than 9 dB by this method.