一种有效减少ADI-FDTD数值色散的方法

An Efficient Method to Reduce the Numerical Dispersion in ADI-FDTD Algorithm

摘要: ADI—FDTD算法的数值色散效应较为明显，本文的研究表明一种通过添加各向异性媒质来修正相速误差，从而减少FDTD数值色散的方法，同样适用于ADI-FDTD，且收效更为显著。数值运算结果证明该方法能够简单有效地去除较宽频带范围内的色散。

Abstract: Based on a new method to reduce the numerical dispersion in FDTD through artificial anisotropy, we show that this method becomes more efficient to ADI-FDTD than to FDTD after a small modification. Numerical results demonstrate that the numerical dispersion in ADI-FDTD can be eliminated significantly in relatively wide-band.