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本文提出了N阶色散媒质瞬态特性的时域分析方法,结合E变换对常规的时域有限差分(FDTD)法进行了修正,改进后的FDTD法能分析和处理与频率有关的电磁场问题,具有方法简洁、易实现等优点.为验证此方法的有效性和可靠性,对N阶色散媒质的反射系数进行了分析与计算,并与已知的解析结果进行了比较.同时,采用此时域方法对N阶色散媒质和导体覆盖N阶色散媒质的瞬时散射场进行了计算和分析.
In this paper, the time-domain analysis method for the transient characteristics of N-order dispersion media is proposed, and the conventional FDTD method is modified by combining E transform. The improved FDTD method can analyze and process the electromagnetic field problems related to frequency, The method has the advantages of simple method and easy implementation, etc. To verify the validity and reliability of this method, the reflection coefficient of N-order dispersion medium is analyzed and calculated and compared with the known analytical results. Domain method is used to calculate and analyze the instantaneous scattering field of N-order dispersion medium and conductor covering N-stage dispersion medium.