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add

Add additional data to existing Smith chart

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Syntax

add(plot,data)
add(plot,frequency,data)

Description

add(plot,data) adds data to an existing Smith chart.

add(plot,frequency,data) adds data to an existing Smith chart based on multiple data sets containing frequencies corresponding to columns of data matrix.

Examples

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This example uses:

Open Live Script

Plot the reflection coefficients of a dipole antenna.

Create a strip dipole antenna on the Y-Z plane. Calculate the complex s-parameters of the dipole antenna from 60 MHz to 90 MHz, with an interval of 150 kHz.

Plot S11 on a Smith plot for a reference impedance of 50 ohm.

d = dipole; 
freq = linspace(60e6, 90e6, 200);
s_50 = sparameters(d, freq,50);
hg = smithplot(s_50,[1,1]);
hg.LegendLabels = {"S11 at 50#ohm"};

Figure Smith Chart contains an axes object. The hidden axes object contains an object of type line. This object represents S11 at 50Ω .

Find S11 for a new impedance of 75 ohm. Add new S11 to the existing Smith plot.

s_75 = sparameters(d, freq, 75);
gamma = rfparam(s_75,1,1);
add(hg, gamma);
hg.LegendLabels = {"S11 at 50#ohm","S11 at 75#ohm"};

Figure Smith Chart contains an axes object. The hidden axes object contains 2 objects of type line. These objects represent S11 at 50Ω , S11 at 75Ω .

Input Arguments

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Smith chart handle, specified as a function handle. If the handle of the Smith chart is not retained during creation, it is obtained by using the command p = smithplot('gco').

Data Types: double

Input data, specified as a complex vector or complex matrix.

For a matrix D, the columns of D are independent data sets. For N-by-D arrays, dimensions 2 and greater are independent data sets.

Data Types: double
Complex Number Support: Yes

Frequency data, specified as a real vector.

Data Types: double

Version History

Introduced in R2017b

See Also

(RF Toolbox) | (RF Toolbox)