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matlab: updates to far-field plot functions

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Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
This commit is contained in:
Thorsten Liebig 2013-06-05 16:23:38 +02:00
parent 5644d86836
commit f286b88c67
2 changed files with 42 additions and 28 deletions
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54
matlab/plotFF3D.m
View File

@ -7,18 +7,20 @@ function h = plotFF3D(nf2ff,varargin)
% nf2ff: output of CalcNF2FF
%
% variable input:
% 'cellelement': - use element from cell array
% 'freq_index': - use the given frequency index, see nf2ff.freq
% - default is 1
% 'logscale': - if set, show farfield with logarithmic scale
% - set the dB value for point of origin
% - values below will be clamped
% 'normalize': - true/false, normalize linear plot
% - default is false, log-plot is always normalized!
%
% example:
% plotFF3D(nf2ff, 'cellelement', 2, 'logscale', -20)
% plotFF3D(nf2ff, 'freq_index', 2, 'logscale', -20)
%
% see examples/NF2FF/infDipol.m
% see examples/antennas/infDipol.m
%
% See also CalcNF2FF
% See also CalcNF2FF, plotFFdB
%
% openEMS matlab interface
% -----------------------
@ -26,40 +28,52 @@ function h = plotFF3D(nf2ff,varargin)
% defaults
logscale = [];
cellelement = 1;
freq_index = 1;
normalize = 0;
for n=1:2:numel(varargin)
if (strcmp(varargin{n},'logscale')==1);
logscale = varargin{n+1};
elseif (strcmp(varargin{n},'cellelement')==1);
cellelement = varargin{n+1};
elseif (strcmp(varargin{n},'freq_index')==1);
freq_index = varargin{n+1};
elseif (strcmp(varargin{n},'normalize')==1);
normalize = varargin{n+1};
end
end
E_far_normalized = nf2ff.E_norm{cellelement} / max(nf2ff.E_norm{cellelement}(:));
if ((normalize~=0) || ~isempty(logscale))
E_far = nf2ff.E_norm{freq_index} / max(nf2ff.E_norm{freq_index}(:));
else
E_far = nf2ff.E_norm{freq_index};
end;
if ~isempty(logscale)
E_far_normalized = 20*log10(E_far_normalized)/-logscale + 1;
ind = find ( E_far_normalized < 0 );
E_far_normalized(ind) = 0;
titletext = sprintf('electrical far field [dB] @ f = %e Hz',nf2ff.freq(cellelement));
E_far = 20*log10(E_far)/-logscale + 1;
E_far = E_far .* ( E_far > 0 );
titletext = sprintf('electrical far field [dB] @ f = %e Hz',nf2ff.freq(freq_index));
elseif (normalize==0)
titletext = sprintf('electrical far field [V/m] @ f = %e Hz',nf2ff.freq(freq_index));
else
titletext = sprintf('electrical far field [V/m] @ f = %e Hz',nf2ff.freq(cellelement));
titletext = sprintf('normalized electrical far field @ f = %e Hz',nf2ff.freq(freq_index));
end
[theta,phi] = ndgrid(nf2ff.theta,nf2ff.phi);
x = E_far_normalized .* sin(theta) .* cos(phi);
y = E_far_normalized .* sin(theta) .* sin(phi);
z = E_far_normalized .* cos(theta);
x = E_far .* sin(theta) .* cos(phi);
y = E_far .* sin(theta) .* sin(phi);
z = E_far .* cos(theta);
%figure
h = surf( x,y,z, E_far_normalized );
h = surf( x,y,z, E_far );
set(h,'EdgeColor','none');
axis equal
axis off
if ~isempty(logscale)
colorbar('YTick', linspace(0,max(E_far(:)),9), ...
'YTickLabel',linspace(logscale, 10*log10(nf2ff.Dmax(freq_index)),9));
else
colorbar;
end
title( titletext );
xlabel( 'x' );
ylabel( 'y' );
zlabel( 'z' );
if (nargout == 0)
clear h;

16
matlab/plotFFdB.m
View File

@ -7,7 +7,7 @@ function h = plotFFdB(nf2ff,varargin)
% nf2ff: output of CalcNF2FF
%
% variable input:
% 'cellelement': - use element from cell array
% 'freq_index': - use the given frequency index, see nf2ff.freq
% - default is 1
% 'xaxis': - 'phi' (default) or 'theta'
% 'param': - array positions of parametric plot
@ -15,25 +15,25 @@ function h = plotFFdB(nf2ff,varargin)
% - default is 1
%
% example:
% plotFFdB(nf2ff, 'cellelement', 2, ...
% plotFFdB(nf2ff, 'freq_index', 2, ...
% 'xaxis', 'phi', 'param', [1 46 91])
%
% see examples/NF2FF/infDipol.m
%
% See also CalcNF2FF
% See also CalcNF2FF, plotFF3D
%
% openEMS matlab interface
% -----------------------
% author: Thorsten Liebig, Stefan Mahr
% defaults
cellelement = 1;
freq_index = 1;
xaxis = 'phi';
param = 1;
for n=1:2:numel(varargin)
if (strcmp(varargin{n},'cellelement')==1);
cellelement = varargin{n+1};
if (strcmp(varargin{n},'freq_index')==1);
freq_index = varargin{n+1};
elseif (strcmp(varargin{n},'xaxis')==1);
xaxis = varargin{n+1};
elseif (strcmp(varargin{n},'param')==1);
@ -41,7 +41,7 @@ for n=1:2:numel(varargin)
end
end
D_log = nf2ff.E_norm{cellelement} / max(nf2ff.E_norm{cellelement}(:));
D_log = nf2ff.E_norm{freq_index} / max(nf2ff.E_norm{freq_index}(:));
D_log = 20*log10(D_log) + 10*log10(nf2ff.Dmax);
if (strcmp(xaxis,'theta')==1);
@ -64,7 +64,7 @@ ylabel( 'directivity (dBi)');
createlegend = @(d)sprintf('%s = %3.1f',param,d / pi * 180);
legendtext = arrayfun(createlegend,parval,'UniformOutput',0);
legend( legendtext );
title( sprintf('far field pattern @ f = %e Hz',nf2ff.freq(cellelement)) );
title( sprintf('far field pattern @ f = %e Hz',nf2ff.freq(freq_index)) );
grid on;
if (nargout == 0)