A technique for assessing the validity of multiline TRL calibration. The main goal of this method is to identify error in the reference impedance of the calibration. You can find in-depth details about the method in [1]. The mTRL algorithm used is based on [2,3], which you can access here: https://github.com/ZiadHatab/multiline-trl-calibration. The uncertainty propagation through the calibration is from here: https://github.com/ZiadHatab/uncertainty-multiline-trl-calibration.
The files in this repo includes everything I used to generate the plots in [1]. The measurement are raw wave parameters, which then converted to S-parameters from the VNA. You SCPI code used to collect the data is from here: https://github.com/ZiadHatab/scpi-anritsu-vectorstar
Extracted reflection coefficient of the impedance transformation and validation bounds.
Estimated error in the reference impedance of the stepped impedance (30 ohm) and the uncertainty contribution.
[1] Z. Hatab, M. E. Gadringer, A. B. Alothman Alterkawi, and W. Bösch, "Validation of the Reference Impedance in Multiline Calibration with Stepped Impedance Standards," in IEEE Open Journal of Instrumentation and Measurement, vol. 2, pp. 1-12, 2023, doi: 10.1109/OJIM.2023.3315349.
[2] Z. Hatab, M. Gadringer and W. Bösch, "Improving The Reliability of The Multiline TRL Calibration Algorithm," 2022 98th ARFTG Microwave Measurement Conference (ARFTG), 2022, pp. 1-5, doi: 10.1109/ARFTG52954.2022.9844064
[3] Z. Hatab, M. E. Gadringer, and W. Bösch, "Propagation of Linear Uncertainties through Multiline Thru-Reflect-Line Calibration," in IEEE Transactions on Instrumentation and Measurement, vol. 72, pp. 1-9, 2023, doi: 10.1109/TIM.2023.3296123.