define_sources_and_lumped_elements.m

The Finite Difference Time Domain Method for Electromagnetics With MATLAB Simulations Atef Elshe

disp('defining sources and lumped element components');

voltage_sources = [];
current_sources = [];
diodes = [];
resistors = [];
inductors = [];
capacitors = [];

% define source waveform types and parameters
waveforms.sinusoidal(1).frequency = 1e9; 
waveforms.sinusoidal(2).frequency = 5e8; 
waveforms.unit_step(1).start_time_step = 50; 
waveforms.gaussian(1).number_of_cells_per_wavelength = 0; 
waveforms.gaussian(2).number_of_cells_per_wavelength = 15; 
waveforms.derivative_gaussian(1).number_of_cells_per_wavelength = 20; 
waveforms.cosine_modulated_gaussian(1).bandwidth = 4e9; 
waveforms.cosine_modulated_gaussian(1).modulation_frequency = 2e9; 

% voltage sources 
% direction: 'xp', 'xn', 'yp', 'yn', 'zp', or 'zn'
% resistance : ohms, magitude   : volts
voltage_sources(1).min_x = 4e-3;
voltage_sources(1).min_y = 0;
voltage_sources(1).min_z = 0;
voltage_sources(1).max_x = 5.8e-3;
voltage_sources(1).max_y = 0.4e-3;
voltage_sources(1).max_z = 1e-3;
voltage_sources(1).direction = 'zp';
voltage_sources(1).resistance = 50;
voltage_sources(1).magnitude = 1;
voltage_sources(1).waveform_type = 'gaussian';
voltage_sources(1).waveform_index = 1;
 
resistors(1).min_x = 4.8e-3;
resistors(1).min_y = 17.6e-3;
resistors(1).min_z = 0;
resistors(1).max_x = 5.2e-3;
resistors(1).max_y = 18e-3;
resistors(1).max_z = 1e-3;
resistors(1).direction = 'z';
resistors(1).resistance = 100;