SParameterCalculator Class Reference

Calculates S-parameters using nodal analysis. More...

#include <SParameterCalculator.h>

Public Member Functions
	SParameterCalculator ()
	Constructor.
bool	setNetlist (const QString &netlist)
	Sets netlist and parses components.
const QString &	getNetlist () const
	Returns current netlist string.
void	addComponent (ComponentType_SPAR type, const string &name, const vector< int > &nodes, QMap< QString, double > value)
	Adds lumped component with real-valued parameters.
void	addComponent (ComponentType_SPAR type, const string &name, const vector< int > &nodes, QMap< QString, Complex > Zvalue)
	Adds component with complex impedance.
void	addComponent (ComponentType_SPAR type, const string &name, const vector< int > &nodes, QMap< QString, QList< double > > freqDepData)
	Adds frequency-dependent component.
void	addPort (int node, double impedance=50.0)
	Adds port to circuit.
vector< vector< Complex > >	calculateSParameters ()
	Calculates S-parameters at current frequency.
vector< vector< Complex > >	convertS2Y (const vector< vector< Complex > > &S, double Z0)
	Converts S-parameters to Y-parameters.
void	addSParamBlockToAdmittance (vector< vector< Complex > > &Y, const Component_SPAR &comp)
	Adds S-parameter block to admittance matrix.
void	addSParameterBlock (const string &name, const vector< int > &nodes, const vector< vector< Complex > > &Smatrix)
	Adds S-parameter block component.
void	printSParameters (const vector< vector< Complex > > &S)
	Prints S-parameters in readable format to console.
void	exportTouchstone (const QString &filename, const vector< vector< Complex > > &S)
	Exports S-parameters to Touchstone file format.
void	clear ()
	Clears all components and ports.
int	getNumNodes () const
	Returns total number of circuit nodes.
size_t	getNumComponents () const
	Returns number of components in circuit.
size_t	getNumPorts () const
	Returns number of ports defined.
double	getFrequency () const
	Returns current analysis frequency.
QMap< QString, QList< double > >	getData ()
	Returns formatted sweep data.
void	setFrequency (double freq)
	Sets current analysis frequency.
void	setFrequencySweep (double start, double stop, int points)
	Configures frequency sweep parameters.
void	calculateSParameterSweep ()
	Performs S-parameter calculation over frequency sweep.
void	printSParameterSweep () const
	Prints all S-parameters from stored sweep.
void	exportSweepTouchstone (const QString &filename) const
	Exports frequency sweep to Touchstone file.

Detailed Description

Calculates S-parameters using nodal analysis.

This class performs frequency-domain analysis of linear RF circuits including:

• Lumped elements (R, L, C)
• Transmission lines (ideal and microstrip)
• Coupled lines and directional couplers
• S-parameter blocks from Touchstone files
• Microstrip discontinuities (steps, opens, vias)

Member Function Documentation

addPort()

void SParameterCalculator::addPort	(	int	node,
		double	impedance = 50.0
	)

Adds port to circuit.

Parameters

node	Node number for port connection
impedance	Port characteristic impedance (default 50Ω)

calculateSParameters()

vector< vector< Complex > > SParameterCalculator::calculateSParameters

(

)

Calculates S-parameters at current frequency.

Returns

S-parameter matrix

setNetlist()

bool SParameterCalculator::setNetlist ( const QString &  netlist )

inline

Sets netlist and parses components.

Parameters

netlist

Circuit netlist in custom format

Returns

true if parsing succeeded, false otherwise

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The documentation for this class was generated from the following files:

• SPAR/SParameterCalculator.h
• SPAR/matrix_operations.cpp
• SPAR/misc.cpp
• SPAR/output.cpp
• SPAR/parser.cpp
• SPAR/SParameterCalculator.cpp
• SPAR/SpecialComponents/CoupledLines.cpp
• SPAR/SpecialComponents/IdealCoupler.cpp
• SPAR/SpecialComponents/IdealTransmissionLine.cpp
• SPAR/SpecialComponents/MicrostripComponents/MicrostripCoupledLines.cpp
• SPAR/SpecialComponents/MicrostripComponents/MicrostripLine.cpp
• SPAR/SpecialComponents/MicrostripComponents/MicrostripOpen.cpp
• SPAR/SpecialComponents/MicrostripComponents/MicrostripStep.cpp
• SPAR/SpecialComponents/MicrostripComponents/MicrostripVia.cpp
• SPAR/SpecialComponents/SP_Component.cpp