Title :
A Broadband Waveguide Calorimeter in the Frequency Range From 50 to 110 GHz
Author :
Shimaoka, Kazuhiro ; Kinoshita, Moto ; Inoue, Takeru
Author_Institution :
Nat. Inst. of Adv. Ind. Technol. & Sci., Nat. Metrol. Inst. of Japan, Tsukuba, Japan
Abstract :
A new broadband rectangular waveguide calorimeter for radio-frequency (RF) power meter calibration in the millimeter-wave region is reported. The calorimeter has a quasi-twin structure exploiting the WR-10 and WR-15 rectangular waveguides, and its operational frequency ranges from 50 to 110 GHz. This calorimeter is characterized by its high measuring speed and sensitivity. A thermal feedback control system reduces the typical reading time per frequency to less than 10 min, and the minimum measurable incident RF power is 0.2 mW. A new technique for reducing the equivalence error by utilizing a flat millimeter-wave absorber is also discussed.
Keywords :
calibration; calorimeters; feedback; millimetre wave detectors; millimetre wave measurement; power meters; rectangular waveguides; velocity measurement; RF; WR-10 rectangular waveguide; WR-15 rectangular waveguide; broadband rectangular waveguide calorimeter; equivalence error reduction; frequency 50 GHz to 110 GHz; millimeter-wave absorber region; power 0.2 mW; quasitwin structure; radiofrequency power meter calibration; speed measurement; thermal feedback control system; Broadband communication; Calibration; Power measurement; Radio frequency; Rectangular waveguides; Standards; Temperature measurement; Calibration; calorimetry; measurement standards; millimeter-wave measurements; power measurement; waveguides;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2012.2225956
