108 lines
2.8 KiB
Matlab
108 lines
2.8 KiB
Matlab
function [port] = calcLumpedPort( port, SimDir, f, varargin)
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% [port] = calcLumpedPort( port, SimDir, f, varargin)
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%
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% Calculate voltages and currents of given lumped port.
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%
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% The port has to be created by e.g. AddLumpedPort().
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%
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% input:
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% port: return value of e.g. AddMSLPort()
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% SimDir: directory, where the simulation files are
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% f: frequency vector for DFT
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%
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% variable input:
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% 'RefImpedance': - use a given reference impedance to calculate inc and
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% ref voltages and currents
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% - default is given port or calculated line impedance
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% 'SwitchDirection': 0/1, switch assumed direction of propagation
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%
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% output:
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% % output signals/values in time domain (TD):
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% port.ut.tot total voltage (time-domain)
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% port.ut.time voltage time vector
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% port.it.tot total current (time-domain)
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% port.it.time current time vector
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%
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% % output signals/values in frequency domain (FD):
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% port.f the given frequency fector
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% port.uf.tot/inc/ref total, incoming and reflected voltage
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% port.if.tot/inc/ref total, incoming and reflected current
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%
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% example:
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% port{1} = calcLumpedPort( port{1}, Sim_Path, f, 'RefImpedance', 50);
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%
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% openEMS matlab interface
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% -----------------------
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% (C) 2012 Thorsten Liebig <thorsten.liebig@gmx.de>
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%
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% See also AddLumpedPort, calcPort
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if (iscell(port))
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for n=1:numel(port)
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port{n}=calcLumpedPort(port{n}, SimDir, f, varargin{:});
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end
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return;
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end
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if (strcmpi(port.type,'Lumped')~=1 && strcmpi(port.type,'Curve')~=1)
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error('openEMS:calcLumpedPort','error, type is not a lumped port');
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end
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%% read optional arguments %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%set defaults
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ref_ZL = port.Feed_R;
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switch_dir = 1;
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UI_args = {};
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for n=1:2:numel(varargin)
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if (strcmp(varargin{n},'RefImpedance')==1);
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ref_ZL = varargin{n+1};
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elseif (strcmpi(varargin{n},'SwitchDirection')==1);
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if (varargin{n+1})
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switch_dir = -1;
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end
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else
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UI_args(end+1) = varargin(n);
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UI_args(end+1) = varargin(n+1);
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end
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end
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port.ZL_ref = ref_ZL;
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% read time domain data
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U = ReadUI( port.U_filename, SimDir, f, UI_args{:} );
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I = ReadUI( port.I_filename, SimDir, f, UI_args{:} );
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% store the original frequency domain waveforms
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u_f = U.FD{1}.val;
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i_f = switch_dir*I.FD{1}.val;
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port.ut.time = U.TD{1}.t;
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port.ut.tot = U.TD{1}.val;
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port.it.time = I.TD{1}.t;
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port.it.tot = switch_dir*I.TD{1}.val;
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port.Zin = u_f./i_f;
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port.f = f;
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uf_inc = 0.5 * ( u_f + i_f .* ref_ZL );
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if_inc = 0.5 * ( i_f + u_f ./ ref_ZL );
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uf_ref = u_f - uf_inc;
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if_ref = if_inc - i_f;
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port.uf.tot = u_f;
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port.uf.inc = uf_inc;
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port.uf.ref = uf_ref;
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port.if.tot = i_f;
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port.if.inc = if_inc;
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port.if.ref = if_ref;
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port.raw.U = U;
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port.raw.I = I;
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