Metrological Traceability of Scattering Parameter Up to 18 GHz for BNC 75–Ω Connector

This paper presents the achievement of primary scattering parameter (S-parameter) measurement standard based on the precision coaxial air lines with BNC, 75 ohms connectors. The primary standard can as a reference to calibrate a device under test up to 18 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 up to 18 GHz in the author's knowledge.