一个简单的计算电磁波多普勒频率的matlab函数，自己用的，随手编写了。-A simple matlab function for compute doppler frequency，very simple.

使用matlab进行二次开发，fdtd计算程序，计算电磁波，空间区域采用PML边界条件，模块化显示-Using MATLAB for secondary development, FDTD calculation program, the calculation of the electromagnetic wave, spatial region of the PML boundary condition, the modular display

该文件是用matlab编程语言，针对电磁波传播特性，用编程方式实现电磁波在二维空间中的传播，并进行了传播过程的演示。(This document is a programming language in MATLAB. In view of the characteristics of electromagnetic wave propagation, the transmission of electromagnetic wave in two-dimensional space is rea