Frequency Domain Analysis

Group delay, power gain, VSWR, and stability reflection coefficients

Analyze the frequency domain behavior of an RF network. Calculate the group delay, power gain, VSWR, and stability reflection coefficients

Functions

`groupdelay`	Group delay of S-parameter object or RF filter object or RF Toolbox circuit object
`ispassive`	Check passivity of N-port S-parameters
`makepassive`	Make N-port S-parameters passive
`freqresp`	Frequency response of rational object and `rationalfit` function object
`gamma2z`	Convert reflection coefficient to impedance
`gammaml`	Calculate load reflection coefficient of two-port network
`gammams`	Calculate source reflection coefficient of two-port network
`gammaout`	Calculate output reflection coefficient of two-port network
`gammain`	Calculate input reflection coefficient of two-port network
`z2gamma`	Convert impedance to reflection coefficient
`powergain`	Calculate power gain from two-port S-parameters
`vswr`	VSWR at given reflection coefficient Γ
`stabilityk`	Stability factor K of two-port network
`stabilitymu`	Stability factor μ of two-port network
`rfinterp1`	Interpolate network parameter data at new frequencies
`passivity`	Plot passivity of N-by-N `rationalfit` function output

Topics

S-Parameter Notation

Introduces the RF Toolbox™ S-parameter notation.

RF Network Parameter Objects

Describes the available RF network parameter objects and their uses.

Featured Examples

De-Embedding S-Parameters

Extract the S-parameters of a Device Under Test (DUT). First, read a Touchstone® file into a sparameter object, calculate the S-parameters for the left and right pads, de-embed the S-parameters using the deembedsparams function and then display the results.

Open Live Script

Data Analysis on S-parameters of RF Data Files

Perform statistical analysis on a set of S-parameter data files using magnitude, mean, and standard deviation (STD). First, read twelve S-parameter files representing twelve similar RF filters into the MATLAB® workspace and plot them. Next, plot and analyze the passband response of these filters to ensure they meet statistical norms.