rfdata.data class - Package: rfdata

Store result of circuit object analysis

Syntax

h = rfdata.data h = rfdata.data('Property1',value1,'Property2',value2,...)

Description

Use the data class to store S-parameters, noise figure in decibels, and frequency-dependent, third-order output (OIP3) intercept points.

There are three ways to create an rfdata.data object:

You can construct it by specifying its properties from workspace data using the rfdata.data constructor.
You can create it from file data using the read method.
You can perform frequency domain analysis of a circuit object using the analyze method, and RF Toolbox software stores the results in an rfdata.data object.

h = rfdata.data returns a data object whose properties all have their default values.

h = rfdata.data('Property1',value1,'Property2',value2,...) returns a data object, h, based on the specified properties. Properties that you do not specify retain their default values.

Use the read method to read data from a file.

Properties

Freq	Frequency data
GroupDelay	Group delay data
IntpType	Interpolation method
Name	Object name
NF	Noise figure
OIP3	Output third-order intercept point
S_Parameters	S-parameter data
Z0	Reference impedance
ZL	Load impedance
ZS	Source impedance

Methods

analyze	Analyze circuit object in frequency domain
calculate	Calculate specified parameters for circuit object
circle	Draw circles on Smith chart
extract	Extract array of network parameters from data object
getop	Display operating conditions
listformat	List valid formats for specified circuit object parameter
listparam	List valid parameters for specified circuit object
loglog	Plot specified circuit object parameters using log-log scale
plot	Plot specified circuit object parameters on X-Y plane
plotyy	Plot specified object parameters with y-axes on both left and right sides
polar	Plot specified circuit object parameters on polar coordinates
read	Read RF data from file to new or existing circuit or data object
restore	Restore data to original frequencies
semilogx	Plot specified circuit object parameters using log scale for x-axis
semilogy	Plot specified circuit object parameters using log scale for x-axis
smith	Plot specified circuit object parameters on Smith chart
write	Write RF data from circuit or data object to file

Examples

Construct an RF data object from a .s2p data file.

file = 'default.s2p';
h = read(rfdata.data,file);  % Read file into data object.
figure
plot(h,'s21','db');   % Plot dB(S21) in XY plane.

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