Can I plot a subset (reduced frequency range) of S-parameters?

Question

Wis 2014-10-8

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https://ww2.mathworks.cn/matlabcentral/answers/157915-can-i-plot-a-subset-reduced-frequency-range-of-s-parameters

编辑： Wis 2014-10-9

I'd like to plot a some rfckt.passive S-parameters over a frequency range less than that of the circuit. Can I do that without creating a new circuit? I'd like to avoid an extra 'analyze' step.

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Answer 1

Sandip Kumar 2014-10-9

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https://ww2.mathworks.cn/matlabcentral/answers/157915-can-i-plot-a-subset-reduced-frequency-range-of-s-parameters#answer_154568

You can use the 'plot' command and use the condition, value pair to define a range of frequency:

http://www.mathworks.com/help/releases/R2014b/rf/plot.html

As written here: When plotting large-signal S-parameters as a function of input power, you can specify frequency points of interest using condition/value pairs.

Thanks, Sandip, MathWorks

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Wis 2014-10-9

OK, but how to specify the proper condition/value pairs? That's not at all clear on the cited page.

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Answer 2

Wis 2014-10-9

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https://ww2.mathworks.cn/matlabcentral/answers/157915-can-i-plot-a-subset-reduced-frequency-range-of-s-parameters#answer_154597

编辑：Wis 2014-10-9

在 MATLAB Online 中打开

I found this works:

% get frequency subset
plot_freqs = freq_list(1:2*end_freq_idx) ;
% define circuit over frequency range of interest
% ( "diff_two_port_Sparams" was created with "freq_list" )
diff_ckt = rfckt.passive('NetworkData',rfdata.network('Data', diff_two_port_Sparams(:,:,1:2*end_freq_idx),  'Freq', plot_freqs, 'z0', Z0*2)) ;