中文说明：
这是一个用FDTD算法计算二维导体方柱散射场RCS的matlab程序.采用UPML吸收边界条件和高斯脉冲源激励,对于学习FDTD方法中的激励源加入,近-远场外推,吸收边界设置等很有帮助。
English Description：
Using UPML absorbing boundary condition and Gaussian pulse source excitation, it is very helpful to learn the excitation source adding, near far field extrapolation, absorbing boundary setting in FDTD method.