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

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