Primary standard and calibration of scattering parameter up to 12 GHz for Type N, 75 ohms connector

This paper summaries the achievement of primary scattering parameter (S-parameter) measurement standard based on the precision coaxial air lines with Type-N, 75 ohms connectors. The primary standard can calibrate a device under test up to 12 GHz. The mechanical measurements of the line's diameters and length made accurately using NMIJ's standard system. Furthermore, the small insertion loss also measured in the microwave frequency regions. The established primary standard is the first achievement to undertake the traceability of S-parameter measurement over 3 GHz (to 12 GHz) in the author's knowledge.