使用Z变换FDTD法计算仿真色散媒质中电磁场  

Calculation and simulation of complicated frequency-dependent materials using the FDTD method and Z-transform

作　　者：周文兵[1] 张昕[1] 杨晓冬[1] 李文兴[1] 

机构地区：[1]哈尔滨工程大学信息与通信学院,哈尔滨黑龙江150001

出　　处：《应用科技》2007年第4期5-8,共4页Applied Science and Technology

摘　　要：在使用FDTD法计算仿真电磁波在复杂色散媒质中的传播时,由于介电参数的复杂性往往给实现带来很大的困难,因此有必要对常规的Maxwell方程做出修改,使得FDTD迭代式能更独立于媒质函数,有利于程序通用化;基于此使用Z变换法把FDTD法应用到复杂色散媒质电磁场计算中;最后给出了一维情况下的仿真图.使用上述Z变换法可以简便对于色散媒质FDTD法计算和编程.It is very difficult to calculate and simulate the propagation of electromagnetic wave in a complicated dis- persive medium using the FDTD method because of the complication of the dielectric function in it. So it is indispensable to modify the conventional Maxwell equations to make the most of FDTD equations more independent of the dielectric function and more convenient for the generalization of programs . Then the calculation is made for the electromagnetic field of complicated dispersive medium by using Z-transform into FDTD Finally, simulation in one dimension is given The Z-transform in this method simplifies the calculation and programming for complicated frequency-dependent medium with FDTD method.

关 键 词：时域有限差分法 色散媒质 Z变换 

分 类 号：TB115[理学—数学]