Z-transform theory and the FDTD method
Z-transform theory and the FDTD method
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DOI：
10.1109/8.477525
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发表时间：
1996
影响因子：
5.7
通讯作者：
D. Sullivan
中科院分区：
文献类型：
--
作者：
D. Sullivan
在对具有色散或非线性的材料实施时域有限差分（FDTD）方法时，通量密度和电场之间的关系可能是问题中最复杂的部分。由于FDTD方法是一种采样时域方法，这种关系可被视为一个数字滤波问题。Z变换通常用于数字滤波和信号处理问题。本文阐述了在涉及复杂的色散或非线性材料的情况下，Z变换在实施FDTD方法中的应用。
In implementing the finite-difference time-domain (FDTD) method on materials which are dispersive or nonlinear, the relationship between the flux density and the electric field can be the most complicated part of the problem. Because the FDTD method is a sampled time-domain method, this relationship can be can be looked upon as a digital filtering problem. The Z transform is typically used in digital filtering and signal processing problems. The paper illustrates the use of the Z transform in implementing the FDTD method where complicated dispersive or nonlinear materials are involved.