Can I obtain S11 values vs Time?

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RandomZed

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Hello
Im currently simulating a project in the time domain solver for a certain frequency range. Understandebly im getting the S11 results as a function of frequency.
I was wondering if there is a way to obtain the S11 values as a function of time (meaning time would be plotted on the x-axis)

If any further information is required, please let me know.

thank you
 

s-parameters are defined in LTI domain.
 

BigBoss said:
s-parameters are defined in LTI domain.
Click to expand...
Hey, so is there no way I can obtain a s11 vs time from the result template? or even excite a new excitation signal with a specified simulaion time and amplitude?
 

RandomZed said:
Hey, so is there no way I can obtain a s11 vs time from the result template? or even excite a new excitation signal with a specified simulaion time and amplitude?
Click to expand...
No, .
But if you want to see how an input Impedance is changing by time, you can use Envelope Simulation based on Harmonic Balance.
You measure complex voltage and current at a node then divide this two quantities to find input impedance.
This method is frequently used in switched RF Power Amplifiers to find their Input Impedances by time to get an idea.
 

Modern vector network analyzers e.g. E5071C are calculating TDR response from S11 via inverse fourier transformer. Should be possible in simulation as well.
 

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