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rfmodel.rational class - Package: rfmodel

Rational function model

Description

Use the rational class to represent RF components using a rational function model of the form

(7-1)

There are two ways to construct an rfmodel.rational object:

• You can fit a rational function model to the component data using the rationalfit function.

• You can use the rfmodel.rational constructor to specify the pole-residue representation of the component directly.

Construction

rfmodel.rational

Construct rational function model

Properties

A	Poles of rational function
C	Residues of rational function
D	Frequency response offset
Delay	Frequency response time delay
Name	Object name

Methods

freqresp	Calculate frequency response of model object
ispassive	Check passivity of model object
stepresp	Calculate response of model object to step signal
timeresp	Calculate time response for model object
writeva	Write Verilog-A description of RF model object

Examples

orig_data=read(rfdata.data,'default.s2p');
freq=orig_data.Freq;
data=orig_data.S_Parameters(2,1,:);
fit_data=rationalfit(freq,data)

fit_data =
 
     Name: 'Rational Function'
     A: [2x1 double]
     C: [2x1 double]
     D: 0
     Delay: 0

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