Vector Corrected Power Sensor Calibration System

Abstract

A new power sensor calibration system incorporating a vector network analyzer has been developed. The vector based system is able to account for the various impedance mismatches at the calibration test port, thus mathematically eliminating the mismatch uncertainty component of the power calibration. With scalar based systems, this component is a major contributor to the overall calibration uncertainty. With the new vector based system, the overall calibration uncertainty is significantly reduced. This paper will discuss the new system in detail, and show measurement data and associated uncertainties.