EVALUATION OF COPLANAR WAVEGUIDE-TO-MICROSTRIP TRANSITIONS FOR PRECISION S-PARAMETER MEASUREMENTS

摘要

The metric of unaccounted power is introduced as a sufficient condition to successful thru-reflect-line (TRL) calibrations for microstrip circuits. It is then demonstrated how this metric can be used both a priori, with simulation data, and a posteriori, with measured data, to evaluate the efficacy of coplanar waveguide to microstrip transitions in TRL calibrations. This demonstration is performed with four different transition topologies, two of which utilize coaxial edge mount connectors and two of which utilize ground-signal-ground coplanar probes.