FD－TD法计算色散媒质中埋入异常体的电磁散射  

The Calculation of EM Scattering by Buried Objects in Dispersive Media Through FD-TD Method

作　　者：方广有[1] 张忠治[1] 汪文秉[1] 

机构地区：[1]中国电波传播研究所,西安交通大学

出　　处：《电子学报》1995年第6期34-38,共5页Acta Electronica Sinica

摘　　要：本文论述了ＦＤ－ＴＤ法用于计算地下浅层目标的电磁散射问题。推出了Ｄｅｂｙｅ型色散媒质中ＦＤ－ＴＤ法的迭代公式和吸收边界条件。通过将ＦＤ－ＴＤ法计算的结果与其它结果相比较，证实了该方法计算有耗媒质中电磁场问题的有效性。对瞬态脉冲在色散媒质中的传播特性进行了讨论。分别计算了典型地下目标的散射波形和波形堆积图。The electromagnetic scattering by buried objects in dispersive media is calculated by FD-TD method. The FD-TD formula and the absorbing boundary condition in Debye dispersive media are deduced,respectively. The validity of this method in lossy media is verified through comparing the FD-TD's result with other one. The propagation of transient pulses in dispersive media is studied in detail. The scattering pulses and the wiggle traces are given for several typical buried objects.

关 键 词：FD-TD法 色散媒质 无载频脉冲 电磁散射 

分 类 号：TN011[电子电信—物理电子学] O451[理学—无线电物理]