Steve Miller

Hello, I have a 1-port S-Parameter file which I'd like to use as the impedance values for AC sources in a more complex S-Parameter circuit. Is this possible? In ADS, this is called a "Data Access Component". In essence, I want the Z in my other AC sources to be an equation. "Z=50*(1+S[4,4])/(1-S[4,4])". Where Source 4 connects solely to my single port S-Parameter file. However, this fails to run because S hasn't been defined yet. Presumably, the simulation has to run in order to self-reference variables...