S-Parameter characterisation of a transition from a 50 Ω coaxial line to a non-50 Ω microstrip line
The letter presents a routine for the experimental characterisation of coaxial-to-microstrip transitions in terms of S-parameters which are normalised with respect to two different impedances. This enables the de-embedding of devices in terms of S-parameters normalised to an impedance which is more convenient than 50 Ω.