rfplot

Plot S-parameter data

Syntax

rfplot(s_obj)

rfplot(s_obj,i,j)

rfplot(___,lineSpec)

rfplot(___,plotflag)

hline = rfplot(___)

[hline,haxes] = rfplot(filter,frequencies)

Description

rfplot(s_obj) plots the magnitude in dB versus frequency of all S-parameters (S₁₁, S₁₂ ... S_NN) on the current axis. s_obj must be an s-parameter object.

rfplot(s_obj,i,j) plots the magnitude of S_{i, j}, in decibels, versus frequency on the current axis.

rfplot(___,lineSpec) plots S-parameters using optional line types, symbols, and colors specified by linespec.

rfplot(___,plotflag) allows to specify the type of plot by using the plotflag.

hline = rfplot(___) plots the S-parameters and returns the column vector of handles to the line objects, hline.

[hline,haxes] = rfplot(filter,frequencies) plots the magnitude response of the S-parameters for the rf filter.

Examples

Plot S-Parameter Data Using rfplot

Use sparameters to create a set S-parameters.

hs = sparameters('default.s2p');

Plot all S-parameters.

rfplot(hs)

Plot S21.

rfplot(hs,2,1)

Plot the angle of S21 in degrees.

rfplot(hs,2,1,'angle')

Plot the real part of S21.

rfplot(hs,2,1,'real')

Input Arguments

s_obj — S-parameters

network parameter object

S-parameters, specified as an RF Toolbox™ network parameter object. To create this type of object, use the sparameters function.

i — Row index

positive integer

Row index of data to plot, specified as a positive integer.

j — Column index

positive integer

Column index of data to plot, specified as a positive integer.

lineSpec — Line specification

character array

Line specification, specified as a text input, that modifies the line types, symbols, and colors of the plot. The function takes text inputs in the same format as plot command. For more information on line specification values, see linespec.

Example: '-or'

plotflag — Plot types

'db' (default)

Plot types, specified as the following values: 'db', 'real', 'imag', 'abs', 'angle'.

Example: 'angle'

filter — RF filter

rffilter object

RF filter, specified as an rffilter object.

frequencies — Frequencies to plot magnitude response

vector

Frequencies to plot magnitude response, specified as a vector.

Output Arguments

hline — Line

line handle

Line containing the S-parameter plot, returned as a line handle.

haxes — Axes

axes handle

Axes of the rfplot, returned as an axes handle.