In this thesis the alternating-direction-implicit (ADI) scheme is introduced to eliminate the CFL stability condition of traditional FDTD method.

• 本论文最后研究了ADI-FDTD算法存在的随着时间步长的增大，其数值色散误差也增大的问题，提出了三维的基于Crank-Nicolson差分格式的FDTD(CN-FDTD)算法。