Abstract: The Finite-Difference Time Domain (FDTD) algorithms of anisotropic material was used to analyze the plan wave scattering by slots on aircraft loaded with anisotropic material. This paper calculated the impact of the material filled in the slot on the scattering characteristics of the rotationally symmetric model. Numerical results showed that the backscatter could be greatly reduced by using negative unixial anisotropic media to fill in the slots of the proper width and depth at the specific position of the model.

Key words: anisotropic, FDTD, slot, RCS, electro-magnetic scattering, rotationally symmetric

摘要： 利用各向异性时域有限差分法(FDTD)分析填充不同介质凹槽的金属目标的电磁散射。就具有旋转对称特性的典型目标模型，详细计算分析了在凹槽中填充不同材料对其电磁散射特性的影响，计算结果显示在目标的特定部位上开适当宽度和深度的槽并填充负单轴各向异性介质能显著降低目标的后向雷达散射截面(RCS)。

关键词: 各向异性, 时域有限差分, 凹槽, 雷达散射截面, 电磁散射, 旋转对称