A measurement comparison of effective efficiency has been carried out betwe
en eight national metrology laboratories at 33 GHz in rectangular waveguide
TEC R320,Two waveguide thermistor mounts were measured. The following nati
onal laboratories participated: BNM-LCIE (France), NIST (U.S.), NRC (Canada
), KRISS (Korea), CSIRO (Australia), PTB (Germany), NMi VSL (The Netherland
s), and NPL (U.K.). The Bureau National de Metrologie-Laboratoire Central d
es Industries Electriques (France) acted as the pilot laboratory for the co
mparison. Excellent harmony is observed between results given by the partic
ipants, especially for the item LCIE-92021.