Hi,

I have a problem in simulating in CST Studio Suite for simple transmission line with lumped elements in the middle and two waveguide ports are set as the input and output port of the transmission line. i can get a correct s parameters when the lumped elements is set as touchstone type and a passive s2p file is imported. However, when i import an active s2p file as an lumped element, the S parameters is obviously wrong . Does it mean the active s2p file is not supported in Microwave Studio?

PS: I can get a correct results when i use the method of Circuit-EM co simulation