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tutorials: update to simple patch antenna tutorial 

Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
pull/10/head
Thorsten Liebig 2013-08-15 16:55:51 +02:00
parent f1b2a94633
commit eed200d1a3
1 changed files with 21 additions and 10 deletions
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29
matlab/Tutorials/Simple_Patch_Antenna.m
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@ -19,7 +19,7 @@ physical_constants;
unit = 1e-3; % all length in mm
% patch width in x-direction
patch.width = 30; % resonant length
patch.width = 32; % resonant length
% patch length in y-direction
patch.length = 40;
@ -82,8 +82,11 @@ stop = [feed.pos 0 substrate.thickness];
[CSX port] = AddLumpedPort(CSX, 5 ,1 ,feed.R, start, stop, [0 0 1], true);
%% finalize the mesh
% detect all edges except of the patch
mesh = DetectEdges(CSX, mesh,'ExcludeProperty','patch');
% detect and set a special 2D metal edge mesh for the patch
mesh = DetectEdges(CSX, mesh,'SetProperty','patch','2D_Metal_Edge_Res', c0/(f0+fc)/unit/50);
% 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);
@ -135,7 +138,6 @@ title( 'reflection coefficient S_{11}' );
xlabel( 'frequency f / MHz' );
ylabel( 'reflection coefficient |S_{11}|' );
drawnow
%% NFFF contour plots %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@ -153,21 +155,30 @@ disp( ['radiated power: Prad = ' num2str(nf2ff.Prad) ' Watt']);
disp( ['directivity: Dmax = ' num2str(nf2ff.Dmax) ' (' num2str(10*log10(nf2ff.Dmax)) ' dBi)'] );
disp( ['efficiency: nu_rad = ' num2str(100*nf2ff.Prad./real(P_in(f_res_ind))) ' %']);
% normalized directivity
% normalized directivity as polar plot
figure
plotFFdB(nf2ff,'xaxis','theta','param',[1 2])
% D_log = 20*log10(nf2ff.E_norm{1}/max(max(nf2ff.E_norm{1})));
% D_log = D_log + 10*log10(nf2ff.Dmax);
% plot( nf2ff.theta, D_log(:,1) ,'k-' );
polarFF(nf2ff,'xaxis','theta','param',[1 2],'normalize',1)
% conventional directivity plot
figure
D_log = 20*log10(nf2ff.E_norm{1}/max(max(nf2ff.E_norm{1})));
D_log = D_log + 10*log10(nf2ff.Dmax);
plot( nf2ff.theta, D_log );
grid on
xlabel('theta')
ylabel('D (dBi)');
legend('phi=0','phi=90')
drawnow
%%
disp( 'calculating 3D far field pattern and dumping to vtk (use Paraview to visualize)...' );
thetaRange = (0:2:180);
phiRange = (0:2:360) - 180;
nf2ff = CalcNF2FF(nf2ff, Sim_Path, f_res, thetaRange*pi/180, phiRange*pi/180,'Verbose',1,'Outfile','3D_Pattern.h5');
figure
plotFF3D(nf2ff);
plotFF3D(nf2ff,'logscale',-20);
E_far_normalized = nf2ff.E_norm{1} / max(nf2ff.E_norm{1}(:)) * nf2ff.Dmax;