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In the precise measurement of RF (Radio Frequency) power, a calorimeter system is often used.Here a calorimeter system was designed, composed and experimented to determine the effective efficiency of bolometer mounts in the 100GHz frequency band.This system is made up of thermo-electric detecting and cooling elements, an auxiliary heater, a new circular bolometer mount and other supporting components. A circular waveguide is used in the system as an RF power guide line to reduce a measurement error due to waveguide loss.As the result of the error estimation, the measurement accuracy of ±0.49% is obtained.
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Inoue et al. (1977) studied this question.
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