资源简介
非常有用,不过要配合第三版的那本书看。这本书里面非常详细的介绍了FDTD在电磁场中的应用,同时可以用在光波传播和弹性波传播里面
代码片段和文件信息
%***********************************************************************
% 1-D FDTD code with simple radiation boundary conditions
%***********************************************************************
%
% Program author: Susan C. Hagness
% Department of Electrical and Computer Engineering
% University of Wisconsin-Madison
% 1415 Engineering Drive
% Madison WI 53706-1691
% 608-265-5739
% hagness@engr.wisc.edu
%
% Date of this version: February 2000
%
% This MATLAB M-file implements the finite-difference time-domain
% solution of Maxwell‘s curl equations over a one-dimensional space
% lattice comprised of uniform grid cells.
%
% To illustrate the algorithm a sinusoidal wave (1GHz) propagating
% in a nonpermeable lossy medium (epsr=1.0 sigma=5.0e-3 S/m) is
% modeled. The simplified finite difference system for nonpermeable
% media (discussed in Section 3.6.6 of the text) is implemented.
%
% The grid resolution (dx = 1.5 cm) is chosen to provide 20
% samples per wavelength. The Courant factor S=c*dt/dx is set to
% the stability limit: S=1. In 1-D this is the “magic time step.“
%
% The computational domain is truncated using the simplest radiation
% boundary condition for wave propagation in free space:
%
% Ez(imaxn+1) = Ez(imax-1n)
%
% To execute this M-file type “fdtd1D“ at the MATLAB prompt.
% This M-file displays the FDTD-computed Ez and Hy fields at every
% time step and records those frames in a movie matrix M which is
% played at the end of the simulation using the “movie“ command.
%
%***********************************************************************
clear
%***********************************************************************
% Fundamental constants
%***********************************************************************
cc=2.99792458e8; %speed of light in free space
muz=4.0*pi*1.0e-7; %permeability of free space
epsz=1.0/(cc*cc*muz); %permittivity of free space
freq=1.0e+9; %frequency of source excitation
lambda=cc/freq; %wavelength of source excitation
omega=2.0*pi*freq;
%***********************************************************************
% Grid parameters
%***********************************************************************
ie=200; %number of grid cells in x-direction
ib=ie+1;
dx=lambda/20.0; %space increment of 1-D lattice
dt=dx/cc; %time step
omegadt=omega*dt;
nmax=round(12.0e-9/dt); %total number of time steps
%***********************************************************************
% Material parameters
%***********************************************************************
eps=1.0;
sig=5.0e-
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 5465 2007-11-19 22:08 fdtd1D.m
文件 19909 2007-11-19 22:08 fdtd2D.m
文件 7828 2007-11-19 22:08 fdtd3D.m
----------- --------- ---------- ----- ----
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