non-causal result from 3D EM via solver

Discussion created by david.royle on Apr 26, 2012
Latest reply on Jun 12, 2012 by david.royle

Has anyone been able to get causal .s4p result using the 3D EM solver up to 25GHz?. I have differential via, modeling up to 25GHz and it is non-causal. I have tried increasing number of points up to 20,000 (which appears to be maximum allowed). I have also tried limiting range to 22GHZ - 24GHz (where the non-causal behavior is located) with still 20K points and it is non-causal.