等离子体涂覆三维目标散射特性的PLRC-FDTD分析

Analysis for scattering of 3-dimentional target coated with plasma by PLRC-FDTD technique

采用分段线性递归卷积时域有限差分方法(PLRC-FDTD)分析等离子体覆盖三维目标的散射特性,分别计算了均匀和非均匀等离子体覆盖导体球的后向雷达散射截面。计算结果表明等离子体涂层选择合适的厚度、电子密度和碰撞频率,能够有效的减小目标的雷达散射截面。选择合适的参数,非均匀等离子体层有更好的隐身效果。

The scattering characteristic of 3-dimentional target coated with nonmagnetic plasma is analyzed by employing finite-difference time domain （FDTD） technique integrated with piecewise linear recursive convolution （PLRC）. The radar scattering sections （RCS＇s） of conductive spherical targets coated with uniform and non-uniform plasma are simulated. Numerical results show that plasma cover layer can greatly reduce echo energy of radar targets if appropriate parameters of plasma are chosen, and the non-uniform plasma cover has better absorption effect.