资源简介
《MATLAB模拟的电磁学数值技术(第3版)》内容简介:计算电磁学界的专家只熟悉一种或很少几种技术,而很少专家熟悉所有主要计算电磁学技术。《MATLAB模拟的电磁学数值技术(第3版)》的目的就是想要填补这方面的空白。《MATLAB模拟的电磁学数值技术(第3版)》适合于大学高年级学生或研究生用。可以作为一学期或两学期的课程。《MATLAB模拟的电磁学数值技术(第3版)》对读者的主要要求是学MATLAB电磁学的课程,具有计算机高级编程语言的知识。由于书中所有的计算机代码是由MATLAB程序给出的,所以作者假设读者具备基本的MATLAB知识,虽然熟悉线性代数和数值分析是有用的,但不是必需的。

代码片段和文件信息
% This program demonstrates a one-dimensional FDTD simulation.
% The problem geometry is composed of two PEC plates extending to
% infinity in y and z dimensions parallel to each other with 1 meter
% separation. The space between the PEC plates is filled with air.
% A sheet of current source paralle to the PEC plates is placed
% at the center of the problem space. The current source excites fields
% in the problem space due to a z-directed current density Jz
% which has a Gaussian waveform in time.
% Define initial constants
eps_0 = 8.854187817e-12; % permittivity of free space
mu_0 = 4*pi*1e-7; % permeability of free space
c = 1/sqrt(mu_0*eps_0); % speed of light
% Define problem geometry and parameters
domain_size = 1; % 1D problem space length in meters
dx = 1e-3; % cell size in meters
dt = 3e-12; % duration of time step in seconds
number_of_time_steps = 2000; % number of iterations
nx = round(domain_size/dx); % number of cells in 1D problem space
source_position = 0.5; % position of the current source Jz
% Initialize field and material arrays
Ceze = zeros(nx+11);
Cezhy = zeros(nx+11);
Cezj = zeros(nx+11);
Ez = zeros(nx+11);
Jz = zeros(nx+11);
eps_r_z = ones (nx+11); % free space
sigma_e_z = zeros(nx+11); % free space
Chyh = zeros(nx1);
Chyez = zeros(nx1);
Chym = zeros(nx1);
Hy = zeros(nx1);
My = zeros(nx1);
mu_r_y = ones (nx1); % free space
sigma_m_y = zeros(nx1); % free space
% Calculate FDTD updating coefficients
Ceze = (2 * eps_r_z * eps_0 - dt * sigma_e_z) ...
./(2 * eps_r_z * eps_0 + dt * sigma_e_z);
Cezhy = (2 * dt / dx) ...
./(2 * eps_r_z * eps_0 + dt * sigma_e_z);
Cezj = (-2 * dt) ...
./(2 * eps_r_z * eps_0 + dt * sigma_e_z);
Chyh = (2 * mu_r_y * mu_0 - dt * sigma_m_y) ...
./(2 * mu_r_y * mu_0 + dt * sigma_m_y);
Chyez = (2 * dt / dx) ...
./(2 * mu_r_y * mu_0 + dt * sigma_m_y);
Chym = (-2 * dt) ...
./(2 * mu_r_y * mu_0 + dt * sigma_m_y);
% Define the Gaussian source waveform
time = dt*[0:number_of_time_steps-1].‘;
Jz_waveform = exp(-((time-2e-10)/5e-11).^2);
source_position_index = round(nx*source_position/domain_size)+1;
% Subroutine to initialize plotting
initialize_plotting_parameters;
% FDTD loop
for time_step = 1:number_of_time_steps
% Update Jz for the current time step
Jz(source_position_index) = Jz_waveform(time_step);
% Update magnetic field
Hy(1:nx) = Chyh(1:nx) .* Hy(1:nx) ...
+ Chyez(1:nx) .* (Ez(2:nx+1) - Ez(1:nx)) ...
+ Chym(1:nx) .* My(1:nx);
% Update electric field
Ez(2:nx) = Ceze (2:nx) .* Ez(2:nx) ...
+ Cezhy(2:nx) .* (Hy(2:nx) - Hy(1:nx-1)) ...
+ Cezj(2:nx) .* Jz(2:nx);
Ez(1) = 0; % A
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 2911 2012-09-07 15:40 Chapter_6\calculate_frequency_domain_outputs.m
文件 5009 2012-09-07 15:40 Chapter_6\display_frequency_domain_outputs.m
文件 1095 2012-09-07 15:40 Chapter_6\example_6_a\define_geometry.m
文件 1970 2012-09-07 15:40 Chapter_6\example_6_a\define_output_parameters.m
文件 2388 2012-09-07 15:40 Chapter_6\example_6_a\define_problem_space_parameters.m
文件 1149 2012-09-07 15:40 Chapter_6\example_6_a\define_sources_and_lumped_elements.m
文件 2039 2012-09-07 15:40 Chapter_6\example_6_b\define_geometry.m
文件 2923 2012-09-07 15:40 Chapter_6\example_6_b\define_output_parameters.m
文件 2384 2012-09-07 15:40 Chapter_6\example_6_b\define_problem_space_parameters.m
文件 1430 2012-09-07 15:40 Chapter_6\example_6_b\define_sources_and_lumped_elements.m
文件 4317 2012-09-07 15:40 Chapter_6\initialize_output_parameters.m
文件 2798 2012-09-07 15:40 Chapter_7\example_7_a1\calculate_domain_size_2d.m
文件 851 2012-09-07 15:40 Chapter_7\example_7_a1\calculate_frequency_domain_outputs_2d.m
文件 4241 2012-09-07 15:40 Chapter_7\example_7_a1\calculate_material_component_values_2d.m
文件 1611 2012-09-07 15:40 Chapter_7\example_7_a1\capture_sampled_electric_fields_2d.m
文件 771 2012-09-07 15:40 Chapter_7\example_7_a1\capture_sampled_magnetic_fields_2d.m
文件 447 2012-09-07 15:40 Chapter_7\example_7_a1\create_circles.m
文件 563 2012-09-07 15:40 Chapter_7\example_7_a1\create_rectangles.m
文件 78 2012-09-07 15:40 Chapter_7\example_7_a1\define_geometry_2d.m
文件 643 2012-09-07 15:40 Chapter_7\example_7_a1\define_output_parameters_2d.m
文件 2454 2012-09-07 15:40 Chapter_7\example_7_a1\define_problem_space_parameters_2d.m
文件 586 2012-09-07 15:40 Chapter_7\example_7_a1\define_sources_2d.m
文件 1994 2012-09-07 15:40 Chapter_7\example_7_a1\display_frequency_domain_outputs_2d.m
文件 2156 2012-09-07 15:40 Chapter_7\example_7_a1\display_sampled_parameters_2d.m
文件 1615 2012-09-07 15:40 Chapter_7\example_7_a1\display_transient_parameters_2d.m
文件 4760 2012-09-07 15:40 Chapter_7\example_7_a1\draw_ob
文件 686 2012-09-07 15:40 Chapter_7\example_7_a1\fdtd_solve_2d.m
文件 578 2012-09-07 15:40 Chapter_7\example_7_a1\frequency_to_time_domain.m
文件 692 2012-09-07 15:40 Chapter_7\example_7_a1\impressed_J_updating_coefficients.m
文件 693 2012-09-07 15:40 Chapter_7\example_7_a1\impressed_M_updating_coefficients.m
............此处省略435个文件信息
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