143 lines
4.6 KiB
Matlab
143 lines
4.6 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 = 5000;
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unit = 1e-3;
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rad = 300;
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mesh_res = [15 15 30];
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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) '/rho*cos(a)*j1(' num2str(kc) '*rho)'];
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func_Ea = [ num2str(1/kc) '*sin(a)*0.5*(j0(' num2str(kc) '*rho)-jn(2,' num2str(kc) '*rho))'];
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func_Ex = [func_Er '*cos(a) - ' func_Ea '*sin(a)'];
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func_Ey = [func_Er '*sin(a) + ' func_Ea '*cos(a)'];
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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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Sim_Path = 'tmp';
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Sim_CSX = 'Circ_WG.xml';
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mkdir(Sim_Path);
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%% setup FDTD parameter & excitation function %%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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FDTD = InitFDTD(1000,1e-6,'OverSampling',5);
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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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BC = [1 1 1 1 1 1] * 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 = -mesh_res(1)/2-rad:mesh_res(1):rad+mesh_res(1)/2;
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mesh.y = -mesh_res(2)/2-rad:mesh_res(2):rad+mesh_res(2)/2;
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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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start = [0,0,0];
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stop = [0,0,length];
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%%% fake pml
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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 = AddCylinder(CSX,'pml',10 ,[0 0 length-abs_length],stop,rad);
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%%% fill everything with copper, priority 0
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CSX = AddMaterial(CSX,'copper');
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CSX = SetMaterialProperty(CSX,'copper','Kappa',56e6);
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CSX = AddBox(CSX,'copper',0,[mesh.x(1) mesh.y(1) mesh.z(1)],[mesh.x(end) mesh.y(end) mesh.z(end)]);
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%%% cut out an air cylinder as circular waveguide... priority 5
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CSX = AddMaterial(CSX,'air');
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CSX = SetMaterialProperty(CSX,'air','Epsilon',1);
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CSX = AddCylinder(CSX,'air', 5 ,start,stop,rad);
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CSX = AddExcitation(CSX,'excite',0,[1 1 0]);
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weight{1} = func_Ex;
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weight{2} = func_Ey;
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weight{3} = 0;
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CSX = SetExcitationWeight(CSX, 'excite', weight );
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CSX = AddCylinder(CSX,'excite', 5 ,[0 0 -0.1],[0 0 0.1],rad);
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%% define dump boxes... %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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CSX = AddDump(CSX,'Et','SubSampling','2,2,4','FileType',1,'DumpMode',2);
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start = [mesh.x(1) , mesh.y(1) , mesh.z(1)];
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stop = [mesh.x(end) , mesh.y(end) , mesh.z(end)];
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CSX = AddBox(CSX,'Et',0 , start,stop);
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% CSX = AddDump(CSX,'Ht','SubSampling','2,2,4','DumpType',1,'FileType',1,'DumpMode',2);
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% CSX = AddBox(CSX,'Ht',0,start,stop);
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% CSX = AddDump(CSX,'Excite_');
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% start = [mesh.x(1) , mesh.y(1) , 0];
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% stop = [mesh.x(end) , mesh.y(end) ,0];
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% CSX = AddBox(CSX,'Excite_',0 , start,stop);
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%
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% CSX = AddDump(CSX,'Exy');
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% start = [mesh.x(1) , mesh.y(1) , length/2];
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% stop = [mesh.x(end) , mesh.y(end) , length/2];
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% CSX = AddBox(CSX,'Exy',0 , start,stop);
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%% define voltage calc boxes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%voltage calc
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CSX = AddProbe(CSX,'ut1',0);
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start = [ -rad 0 0/2 ];stop = [ rad 0 0/2 ];
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CSX = AddBox(CSX,'ut1', 0 ,start,stop);
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%current calc
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CSX = AddProbe(CSX,'it1',1);
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mid = 0.5*(coax_rad_i+coax_rad_ai);
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start = [ -mid -mid length/2 ];stop = [ mid mid length/2 ];
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CSX = AddBox(CSX,'it1', 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('ut1','tmp/');
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plot(UI.TD{1}.t,UI.TD{1}.val);
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grid on;
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% plotting
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if exist('tmp/Et.h5','file')
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PlotArgs.slice = {mesh.x(round(end/2)) mesh.y(round(end/2)) mesh.z(round(end/2))};
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PlotArgs.pauseTime=0.1;
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PlotArgs.component=0;
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PlotArgs.zlim='auto';
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PlotHDF5FieldData('tmp/Et.h5',PlotArgs)
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end |