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 characteristics of the plasma covering three-dimensional target were analyzed by piecewise linear recursive convolution time-domain finite difference method (PLRC-FDTD). The backscatter cross section of the uniform and inhomogeneous plasma-covered conductor sphere was calculated. The calculated results show that the plasma coating thickness, electron density and collision frequency can effectively reduce the radar cross section of the target. Select the appropriate parameters, non-uniform plasma layer has a better stealth effect.