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Ansys Learning Forum › Forums › Discuss Simulation › Electronics › S-parameter causality issue › Reply To: S-parameter causality issue

March 7, 2024 at 8:40 pm
aalmeida
Subscriber

Hi Dan, 

I'm also running into a similar issue where I cannot extract causal PDN Z-parameter models from my package or board design.

If possibe, could you please post a screenshot of your recommended "Compute SYZ-parameters" setup window for the following senario?

PDN Z-parameter extraction up to 10GHz

I reverted all of my capacitors models to C / ESR / ESL approximations to keep things simple. 

Besides the frequency setup range, I am also curious what you recommend for the other setup options in this window.  For reference, I have tried about a dozen different combinations of settings and none of my results can pass 2.5% causality tolerance.

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