Measuring the scattering parameters of microwave devices

A complete six-port network analyser is proposed that makes use of a single reflectometer. The proposed configuration employes a precision attenuator which dispenses with connections and disconnections with calibration standards, needs no inversion of the two-port device under test for measuring the transmission parameters and as its main feature, avoids the use of switches which are always present in the traditional configurations described in the literature. Its calibration and measurement procedures are also described.