[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Effect of Uncorrected Test Port Match of a Vector Network Analyzer on the Transmission Coefficient Gained After SOLT Calibration

摘要： For the widespread SOLT calibration scheme, the influence of uncorrected RF performance of the VNA on the transmission parameters of the DUT is investigated. It is shown that the corresponding error is proportional to the uncorrected reflection coefficient of the passive test port multiplied by its directivity and the residual source match of the active port. The theoretical results are in excellent agreement with a variety of experiments that have been performed in the WR-10 waveguide band. The outcome of the work asks for a reformulation of the uncertainty calculation for the transmission parameters if the calibrated VNA is characterized by the residuals of the error box parameters (ripple method). Especially for well-matched devices, the contribution from this effect exceeds the known influences significantly.