The finite-difference time-domain (FDTD) method is a powerful tool of computational electromagnetical, which have the advantages of fast computation, little storage memory and well simulation.

• 近二十年来，时域有限差分(FDTD)方法以其运算速度快、节省存储空间、仿真效果好等众多的优点，迅速运用于电磁场的各个领域。