Calibration of a 3.5 mm coaxial power sensor using a transfer standard with 7 mm coaxial or WR42 waveguide connectors

A calibration system of a 3.5 mm coaxial power sensor was implemented using transfer standards with 7 mm coaxial or K-band waveguide input connectors. A 7 mm-3.5 mm or WR42-3.5 mm adapter was used to form a combined transfer standard. The effective efficiency of the combined transfer standard was obtained. The 3.5 mm coaxial power sensor was calibrated using the well-known direct comparison method and measurement uncertainty was evaluated.