96 lines
2.8 KiB
Matlab
96 lines
2.8 KiB
Matlab
close all;
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clear all;
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clc
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abs_length = 250;
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length = 1000;
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coax_rad_i = 100;
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coax_rad_ai = 230;
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coax_rad_aa = 240;
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mesh_res = [5 5 5];
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EPS0 = 8.85418781762e-12;
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MUE0 = 1.256637062e-6;
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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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Sim_Path = 'tmp';
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Sim_CSX = 'coax.xml';
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mkdir(Sim_Path);
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%setup FDTD parameter
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FDTD = InitFDTD(5e5,1e-6);
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FDTD = SetGaussExcite(FDTD,0.5e9,0.5e9);
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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
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CSX = InitCSX();
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mesh.x = -2.5*mesh_res(1)-coax_rad_aa : mesh_res(1) : coax_rad_aa+2.5*mesh_res(1);
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mesh.y = mesh.x;
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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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%create copper helix and feed lines...
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CSX = AddMaterial(CSX,'copper');
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CSX = SetMaterialProperty(CSX,'copper','Kappa',56e6);
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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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%%% coax
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start = [0, 0 , 0];stop = [0, 0 , length];
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CSX = AddCylinder(CSX,'copper',0 ,start,stop,coax_rad_i);
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CSX = AddCylindricalShell(CSX,'copper',0 ,start,stop,0.5*(coax_rad_aa+coax_rad_ai),(coax_rad_aa-coax_rad_ai));
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start(3) = length-abs_length;
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CSX = AddCylindricalShell(CSX,'pml',0 ,start,stop,0.5*(coax_rad_i+coax_rad_ai),(coax_rad_ai-coax_rad_i));
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start(3) = 0; stop(3)=mesh_res(1)/2;
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CSX = AddExcitation(CSX,'excite',0,[1 1 0]);
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weight{1} = '(x)/(x*x+y*y)';
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weight{2} = 'y/pow(rho,2)';
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weight{3} = 0;
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CSX = SetExcitationWeight(CSX, 'excite', weight );
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CSX = AddCylindricalShell(CSX,'excite',0 ,start,stop,0.5*(coax_rad_i+coax_rad_ai),(coax_rad_ai-coax_rad_i));
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%dump
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CSX = AddDump(CSX,'Et_','DumpMode',2);
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start = [mesh.x(1) , 0 , mesh.z(1)];
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stop = [mesh.x(end) , 0 , mesh.z(end)];
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CSX = AddBox(CSX,'Et_',0 , start,stop);
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CSX = AddDump(CSX,'Ht_','DumpType',1,'DumpMode',2);
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CSX = AddBox(CSX,'Ht_',0,start,stop);
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%voltage calc
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CSX = AddProbe(CSX,'ut1',0);
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start = [ coax_rad_i 0 length/2 ];stop = [ coax_rad_ai 0 length/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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