Physical models for 2.4 mm and 3.5 mm coaxial VNA calibration kits developed within the NIST microwave uncertainty framework

We developed physical models of commercially-available 2.4 mm and 3.5 mm coaxial calibration kits for vector network analyzers. These models support multiline thru-reflect-line (TRL) and open-short-load-thru (OSLT) calibrations, and include error mechanisms in each of the standards´ constituent parameters that can be utilized in the NIST Microwave Uncertainty Framework to propagate uncertainties. For both connector sizes, we calibrated a network analyzer using the two calibration methods, and compared measurements and uncertainties made on a number of verification devices. In both cases, we showed that the two calibrations agree to within their respective uncertainties.