VNA Error Model Conversion for N-Port Calibration Comparison

摘要

This paper examines the extended 12-term error model commonly used in commercial multiport vector network analyzers, introduces a generalized multiport error model, and applies this error model for the purposes of general N-port comparison of calibrations. These tools have been implemented in a commercially available calibration and measurement software product [1]. Previous work demonstrated the utility of these tools in the estimation of calibration error associated with ignoring coupling [2] and for evaluating measurement system repeatability [3]. Equations are presented for bidirectional conversion between an extended 16-term-like error model and the extended 12-term model as well as for calculation of DUT-specific and worst-case multiport calibration comparison error bounds.