Learning Forum

[Suzit Hasan Nayem]

I would like to know, the methodology of the Ansys Interconnect  time domain analysis for modulators specifically, optical time variant s-parameter  element.   I have checked out the s parameter file format, where the frequency dependent S parameter data are provided against different modulating electrical signal. But Bu how, the time-dependent output  are generated as the data transmission is dynamic  i.e. depends on the modulating electrical  signal 

 

[Guanhui Wang]

Hi Suzit Hasan Nayem,

 

Thank you for the post. In the s-parameter file you will notice the transmission is dependent on the electrical driving signal, and if the driving signal is not defined, the solver will use the interpolation based on the provided values. Hope this can help. 

[Suzit Hasan Nayem]

Thanks for your kind reply.  Actually, I didn't mean that, I was asking how the frequency domain data is used for providing time domain output.  I guess the methodology is not just Inverse Fourier Transform, as the time domain output is voltage-dependent.

[Guanhui Wang]

Hi Suzit Hasan Nayem,

 

We use digital filters to convert the frequency domain data to time domain effect. This is in the Digital Filter section in the model and you can tune the number of taps and other parameters to let this model work the best in both domains. You can use the ONA to test the frequency domain and time domain behavior and make sure they match.