光滑目标表面不连续性极点分布规律研究

利用雷达目标散射场极点分布特征来进行目标识别具有重要的理论意义.用矩阵束法对导体球和圆柱体散射场进行极点提取,分析了当光滑导体球与圆柱体表面存在局部凸起和凹陷时,极点分布的变化规律.结果发现,当光滑导体球和圆柱体局部存在凸起时,和无凸起情况相比,极点的虚部变小;当光滑表面存在局部凹陷时,极点虚部变大.

Poles distribution of unsmooth conduct object

The characteristic of poles distribution of radar target has an important application potential in target recognition and identification. By employing FDTD method to obtain the scattering data of conductor sphere and cylinder with concave or convex surface, the pole distribution characteristic of unsmooth conduct objects are acquired with MPM (Matrix pencil method). Results show that for conductor sphere or cylinder with a convex surface, the imaginary of poles will be smaller than those of smooth conductor objects, contrariwise, the imaginary of poles will become larger for a concave surface.