Determines physical distance from a transmission or reflection ntwk
Given a matched transmission or reflection measurment the physical distance is estimated at each frequency point based on the scattering parameter phase of the ntwk and propagation constant.
If the ntwk is a reflect measurement, the returned distance will be twice the physical distance.
Parameters: ntwk (Network) – A one-port network of either the reflection or the transmission. if
>>>air = rf.air50 >>>l = air.line(1,’cm’) >>>d_found = air.extract_distance(l.s21) >>>d_found