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Tutorial: Use new CSXCAD function: DetectEdges

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Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
This commit is contained in:
Thorsten Liebig 2012-11-07 14:09:48 +01:00
parent b5a39c54ba
commit 9367a8c091
1 changed files with 14 additions and 9 deletions
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23
matlab/Tutorials/Simple_Patch_Antenna.m
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@ -48,16 +48,12 @@ BC = {'MUR' 'MUR' 'MUR' 'MUR' 'MUR' 'MUR'}; % boundary conditions
FDTD = SetBoundaryCond( FDTD, BC );
%% setup CSXCAD geometry & mesh
% currently, openEMS cannot automatically generate a mesh
CSX = InitCSX();
%create fixed lines for the simulation box, substrate and port
mesh.x = [-SimBox(1)/2 SimBox(1)/2 -substrate.width/2 substrate.width/2 -patch.width/2 patch.width/2 feed.pos+[-feed.width/2 feed.width/2]];
mesh.y = [-SimBox(2)/2 SimBox(2)/2 -substrate.length/2 substrate.length/2 -feed.width/2 feed.width/2 -patch.length/2 patch.length/2];
mesh.z = [-SimBox(3)/3 SimBox(3)*2/3 linspace(0,substrate.thickness,substrate.cells) ];
% generate a smooth mesh with max. cell size: lambda_min / 20
mesh = SmoothMesh(mesh, c0 / (f0+fc) / unit / 20);
CSX = DefineRectGrid(CSX, unit, mesh);
%initialize the mesh with the "air-box" dimensions
mesh.x = [-SimBox(1)/2 SimBox(1)/2];
mesh.y = [-SimBox(2)/2 SimBox(2)/2];
mesh.z = [-SimBox(3)/3 SimBox(3)*2/3];
%% create patch
CSX = AddMetal( CSX, 'patch' ); % create a perfect electric conductor (PEC)
@ -72,6 +68,9 @@ start = [-substrate.width/2 -substrate.length/2 0];
stop = [ substrate.width/2 substrate.length/2 substrate.thickness];
CSX = AddBox( CSX, 'substrate', 0, start, stop );
% add extra cells to discretize the substrate thickness
mesh.z = [linspace(0,substrate.thickness,substrate.cells+1) mesh.z];
%% create ground (same size as substrate)
CSX = AddMetal( CSX, 'gnd' ); % create a perfect electric conductor (PEC)
start(3)=0;
@ -83,7 +82,13 @@ start = [feed.pos-feed.width/2 -feed.width/2 0];
stop = [feed.pos+feed.width/2 +feed.width/2 substrate.thickness];
[CSX] = AddLumpedPort(CSX, 5 ,1 ,feed.R, start, stop, [0 0 1], true);
%%nf2ff calc
%% finalize the mesh
% generate a smooth mesh with max. cell size: lambda_min / 20
mesh = DetectEdges(CSX, mesh);
mesh = SmoothMesh(mesh, c0 / (f0+fc) / unit / 20);
CSX = DefineRectGrid(CSX, unit, mesh);
%% add a nf2ff calc box; size is 3 cells away from MUR boundary condition
start = [mesh.x(4) mesh.y(4) mesh.z(4)];
stop = [mesh.x(end-3) mesh.y(end-3) mesh.z(end-3)];
[CSX nf2ff] = CreateNF2FFBox(CSX, 'nf2ff', start, stop);