Measurement and evaluation of the WR-28 calorimeter

We have designed and measured WR28 calorimeter which will be used as national primary power standard frequency range is 26.5-40GHz. The detail of design and measurement results was published in 2010CPEM and 74
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ARFTG[1][2]. At present, the effective efficiency of WR-28 calorimeter was calculated and some uncertainty evaluations were done.