The GT-RF/95-1 key comparison of power measurements at 62 GHz

An international key comparison of effective efficiency was carried out fro m 1996 to 1998 between four National Metrology Institutes (NMIs) at 62 GHz in IEC R620 rectangular waveguide standard, The traveling item was a wavegu ide temperature compensated thermistor mount. The following NMIs participat ed: National Physical Laboratory (NPL), Malvern, U,K,; State Scientific Ind ustrial Association (SSIA), Kharkov, Ukraine; National Institute of Standar ds and Teehnology (NIST), Boulder, CO; and Bureau National de Metrologie-La boratoire Central des Industries Electriques (BNM-LCIE), Fontenay-aux-Roses , France, which acted as the pilot laboratory for the GT-RF/95-1 key compar ison. Good agreement was found among the results from the different NMIs, w ith all results agreeing within one standard uncertainty (kappa = 1), which ranged from approximately 0.5% to 0.9%.