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本文推出集总电阻加载圆柱形天线在时域有限差分（FD-TD）法中的计算公式。对Mur二阶吸收边界条件在三维FD-TD法计算中的稳定性进行了研究，提出保证Mur二阶吸收边界条件稳定所必须注意的问题。在集总电阻加载圆柱形天线激励下，对色激媒质中三维目标的瞬态电磁散射特性进行了计算和分析，并将部分计算结果与实验测试的结果进行了比较，二者具有比较好的一致性。研究了色散媒质和目标特性对目标回波信号的影响，并对有耗媒质中细导线型目标的瞬态散射机理进行了分析。
In this paper, the formula of lumped-resistor-loaded cylindrical antenna in the finite-difference time domain (FD-TD) method is introduced. The stability of Mur second-order absorption boundary condition in 3D FD-TD method is studied, and the problems that must be paid attention to to ensure the stability of Mur second-order absorption boundary condition are proposed. Under the excitation of a lumped resistance loaded cylindrical antenna, the transient electromagnetic scattering characteristics of the three-dimensional target in the color-stimulating medium are calculated and analyzed, and some of the calculated results are compared with the experimental test results, both of which have good consistency. The influence of dispersion medium and target characteristic on the target echo signal is studied. The transient scattering mechanism of the thin wire target in lossy medium is analyzed.