156 lines
4.8 KiB
Matlab
156 lines
4.8 KiB
Matlab
close all;
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clear all;
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clc
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%% setup the simulation %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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abs_length = 500;
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length = 10000;
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unit = 1e-3;
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rad = 300;
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mesh_max = 15;
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N_alpha = ceil(rad * pi / mesh_max) * 2;
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mesh_res = [mesh_max 2*pi/N_alpha mesh_max];
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do_Half_Waveguide = 1;
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EPS0 = 8.85418781762e-12;
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MUE0 = 1.256637062e-6;
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C0 = 1/sqrt(EPS0*MUE0);
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f0 = 400e6;
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p11 = 1.841;
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kc = p11 / rad /unit;
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k = 2*pi*f0/C0;
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fc = C0*kc/2/pi
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beta = sqrt(k^2 - kc^2);
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kc = kc*unit;
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func_Er = [ num2str(-1/kc^2,15) '/rho*cos(a)*j1(' num2str(kc,15) '*rho)'];
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func_Ea = [ num2str(1/kc,15) '*sin(a)*0.5*(j0(' num2str(kc,15) '*rho)-jn(2,' num2str(kc,15) '*rho))'];
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%% define file pathes and openEMS options %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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openEMS_Path = [pwd() '/../../']
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openEMS_opts = '';
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% openEMS_opts = [openEMS_opts ' --disable-dumps'];
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% openEMS_opts = [openEMS_opts ' --debug-material'];
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% openEMS_opts = [openEMS_opts ' --debug-operator'];
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% openEMS_opts = [openEMS_opts ' --engine=multithreaded'];
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if (do_Half_Waveguide)
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Sim_Path = 'tmp_half_CWG_CC';
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else
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Sim_Path = 'tmp_full_CWG_CC';
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end
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Sim_CSX = 'Circ_WG_CC.xml';
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mkdir(Sim_Path);
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%% setup FDTD parameter & excitation function %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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FDTD = InitCylindricalFDTD(1e5,1e-5,'OverSampling',10);
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% T = 1/f0;
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% FDTD = SetCustomExcite(FDTD,f0,[ '(1-exp(-1*(t/' num2str(T) ')^2) ) * sin(2*pi*' num2str(f0) '*t)' ]);
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FDTD = SetSinusExcite(FDTD,f0);
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BC = [0 0 0 0 0 0];
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FDTD = SetBoundaryCond(FDTD,BC);
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%% setup CSXCAD geometry & mesh %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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CSX = InitCSX();
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mesh.x = 0:mesh_res(1):rad;
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if (do_Half_Waveguide)
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mesh.y = linspace(-pi/2,pi/2,N_alpha/2);
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else
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mesh.y = linspace(-pi,pi,N_alpha)+pi/2;
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end
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y_delta = mesh.y(2) - mesh.y(1);
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mesh.z = 0 : mesh_res(3) : length;
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CSX = DefineRectGrid(CSX, 1e-3,mesh);
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%% fake pml %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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start = [0 mesh.y(1)-y_delta length-abs_length];
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stop = [rad*1.2 mesh.y(end)+y_delta length];
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finalKappa = 0.3/abs_length^4;
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finalSigma = finalKappa*MUE0/EPS0;
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CSX = AddMaterial(CSX,'pml');
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CSX = SetMaterialProperty(CSX,'pml','Kappa',finalKappa);
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CSX = SetMaterialProperty(CSX,'pml','Sigma',finalSigma);
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CSX = SetMaterialWeight(CSX,'pml','Kappa',['pow(abs(z)-' num2str(length-abs_length) ',4)']);
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CSX = SetMaterialWeight(CSX,'pml','Sigma',['pow(abs(z)-' num2str(length-abs_length) ',4)']);
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CSX = AddBox(CSX,'pml',0 ,start,stop);
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%% apply the excitation %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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CSX = AddExcitation(CSX,'excite',0,[1 1 0]);
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weight{1} = func_Er;
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weight{2} = func_Ea;
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weight{3} = 0;
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CSX = SetExcitationWeight(CSX, 'excite', weight );
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start(3)=-.5;
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stop(3)=0.5;
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CSX = AddBox(CSX,'excite', 5 ,start,stop);
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%% define dump boxes... %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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CSX = AddDump(CSX,'Et','FileType',1,'DumpMode',0,'SubSampling','1,1,5');
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start = [mesh.x(1) , mesh.y(1)-y_delta , 0];
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stop = [mesh.x(end) , mesh.y(end)+y_delta , length];
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CSX = AddBox(CSX,'Et',0 , start,stop);
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CSX = AddDump(CSX,'Ht','FileType',1,'DumpType',1,'DumpMode',0,'SubSampling','1,1,5');
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CSX = AddBox(CSX,'Ht',0 , start,stop);
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CSX = AddDump(CSX,'Et_rz_','FileType',0,'DumpMode',2,'SubSampling','1,1,5');
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start = [mesh.x(1) , 0 , 0];
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stop = [mesh.x(end) , 0 , length];
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CSX = AddBox(CSX,'Et_rz_',0 , start,stop);
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%% define voltage calc boxes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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CSX = AddProbe(CSX,'ut_exc',0);
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start = [ 0 0 0 ];stop = [ rad 0 0 ];
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CSX = AddBox(CSX,'ut_exc', 0 ,start,stop);
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CSX = AddProbe(CSX,'ut_1',0);
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start = [ 0 0 length/2 ];stop = [ rad 0 length/2 ];
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CSX = AddBox(CSX,'ut_1', 0 ,start,stop);
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%% Write openEMS compatoble xml-file %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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WriteOpenEMS([Sim_Path '/' Sim_CSX],FDTD,CSX);
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%% cd to working dir and run openEMS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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savePath = pwd();
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cd(Sim_Path); %cd to working dir
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command = [openEMS_Path 'openEMS.sh ' Sim_CSX ' ' openEMS_opts];
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disp(command);
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system(command)
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cd(savePath);
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%% do the plots %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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UI = ReadUI('ut_1',[Sim_Path '/']);
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plot(UI.TD{1}.t,UI.TD{1}.val);
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grid on;
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file = [Sim_Path '/Et.h5'];
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z_planes = 1;
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timestep = 10;
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for z =z_planes
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figure
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if exist(file,'file')
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mesh = ReadHDF5Mesh(file);
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fields = ReadHDF5FieldData(file);
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[ALPHA RHO] = meshgrid(double(mesh.lines{1}),double(mesh.lines{2}));
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X = RHO.*cos(ALPHA);
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Y = RHO.*sin(ALPHA);
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Er = double( fields.values{timestep}(:,:,z,1) );
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Ea = double( fields.values{timestep}(:,:,z,2) );
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Ez = double( fields.values{timestep}(:,:,z,3) );
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Ex = Er.*cos(ALPHA) - Ea.*sin(ALPHA);
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Ey = Er.*sin(ALPHA) + Ea.*cos(ALPHA);
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quiver(X,Y,Ex,Ey)
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axis equal
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title(['z : ' num2str(mesh.lines{2}(z)) ' ts: ' int2str(n)] );
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Ex(10,5)
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pause(1)
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end
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end |