分形在天线雷达散射截面减缩中的应用

The Use of Fractal in Antenna RCS Reduction

首次提出利用分形独特的填充性能实现天线雷达散射截面 (RCS)减缩 ,同时 ,分形单元可以减缩单元间的耦合 ,提高阵列的性能。给出了分形天线与常规天线辐射、散射特性的对比 ,表明将分形的概念用于天线设计中 ,不仅可以减小互耦 ,提高天线阵列的辐射性能 ,而且也可以减小天线的雷达散射截面 ,对天线的隐身有一定的借鉴作用。

For the first time, the fractal geometry is used for the radar cross section (RCS) reduction of antenna. The special space filling ability of fractal geometry can reduce the RCS, and also reduce the array coupling to enhance the array performance. The radiation and scattering character of fractal antenna array are illustrated, compared with conventional antenna, which shows that fractal antenna not only can improve the array performance, but also can reduce the RCS of antenna. The conclusion of the paper is useful for the antenna radar cross section reduction.