基于时域有限差分法的各向异性铁氧体圆柱电磁散射分析

摘要

A metal cylinder coated with anisotropic ferrite material is analyzed using the finite-difference time-domain method (FDTD) in this paper, and the bistatic radar cross-section (RCS) is obtained. The new method of electromagnetic scattering by magnetized ferrite medium is analyzed in detail based on the FDTD. To exemplify the availability of the algorithm, bistatic RCS of a magnetized ferrite cylinder is computed, and the numerical results are the same as the shift operator FDTD (SO-FDTD), which shows that the proposed FDTD method is correct and efficient.%采用时域有限差分法(FDTD)求解了各向异性铁氧体材料覆盖金属圆柱的雷达散射截面(RCS).提出一种新的磁各向异性材料的离散方法，推导了磁化铁氧体的FDTD公式，并将其应用于分析二维铁氧体覆盖金属圆柱的散射.通过与移位算子法(SO-FDTD)对比证明了此方法的有效性.应用此方法求解了不同铁氧体参数影响下金属圆柱的RCS.数值结果表明，该方法正确可行，具有较高的计算效率.