磁化等离子体涂覆目标散射特性的FDTD方法

FDTD Technique Analysis on the Scattering of Targets Coated with Magnetized Plasma

基于分段线性递归卷积法(PLRC)把时域有限差分方法(FDTD)推广应用于三维各向异性磁化等离子体中,给出了三维计算公式,并且和电流密度卷积时域有限差分方法(JEC-FDTD)进行了对比,结果表明PLRC方法更精确。计算了磁化等离子体覆盖球锥体的双站雷达散射截面(RCS)与无涂敷以及涂敷非磁化等离子体球锥体的散射特性进行了对比,结果表明磁化等离子体有更加独特的特性。其隐身效果优于非磁化等离子体。

The finite-difference time-domain method（FDTD） is extended to three dimensional anisotropic magnetized plasma based on the piecewise linear recursive convolution（PLRC）.In this paper,a 3-D formula is provided and the numerical results show that the PLRC-FDTD method has the better accuracy than the current density convolution（JEC） does.The radar scattering sections（RCS） of conductive targets coated with uniform magnetized plasma are simulated.The results show that magnetized plasma cover layer can greatly reduce echo energy of radar targets and the magnetized plasma cover has better absorption effect than non-magnetized.