Rational Fitting and Time Domain Analysis

Fit frequency domain data to rational function, calculate time, step, impulse, and frequency response

Use the rationalfit function to fit data defined in the frequency domain with an equivalent Laplace transfer function. Using rational function fitting you can create simple models for a required accuracy, model order reduction, zero phase on extrapolation to DC, and causal modeling system among other advantages.


rfmodel.rationalStore output power and phase information for amplifiers or mixers


rationalfitApproximate data using stable rational function object
timerespTime response for rational function object
steprespStep-signal response of rational function object
freqrespFrequency response of a rational function and rationalfit function object
impulseImpulse response for rational function object
ispassiveReturn true if rationalfit output is passive at all frequencies
makepassiveEnforce passivity of a rationalfit output
passivityPlot passivity of N-by-N rationalfit function output
generateSPICEGenerate SPICE file from rationalfit of S-parameters


RF Model Objects

Describes the available RF model objects and their uses.

Featured Examples