Q-factor of microwave resonators: Calibrated vs. uncalibrated measurements

Abstract

In this article we present a study about using VNA calibrated or uncalibrated measurements for the purpose of measuring the Q-factor of a dielectric loaded microwave resonator. We evaluate the uncertainties in Q involved in both methods. We use a complete and robust transmission resonant model for the fit and parameter extraction. The Q values obtained from uncalibrated and calibrated data were compared by taking into account the S-parameter measurement uncertainty.