Mark Jenkins

You are correct... I was not using the correct definition of S parameters in this case. I had forgotten that I should be using generalized incident and reflected waves (that include a sqrt(Zi) so that Sij = Vi^out/Vj^in * sqrt(Zj/Zi) ). Everything matches up correctly now. Thanks!

Also, I am using version 0.0.19 (373d737)

I would like to report an issue I am having when working with S parameter simulations where the ports involved have different values for their reference impedance. I understand that in general S parameters assume that all ports have the same (in principle arbitrary) value of the reference impedance. I am not sure how the S-parameter simulation defines the matrix in this case but I would have expected it to be the ratio of the incoming and outgoing voltage waves for the ports involved (Sij = Vi^out/Vj^in)....

Thanks for the info. I will just input them manually then. Fortunately I don't think...

I am trying to simulate circuits that involve different types of transmission lines....