Precise Power Measurement With a Single-Mode Waveguide Calorimeter in the 220–330 GHz Frequency Range | IEEE Journals & Magazine | IEEE Xplore

Precise Power Measurement With a Single-Mode Waveguide Calorimeter in the 220–330 GHz Frequency Range


Abstract:

A calorimeter based on single-mode WR-03 waveguides is developed with the aim of establishing a measurement standard for terahertz (THz)-wave power over the frequency ran...Show More

Abstract:

A calorimeter based on single-mode WR-03 waveguides is developed with the aim of establishing a measurement standard for terahertz (THz)-wave power over the frequency range of 220-330 GHz. Correction factors such as the thermal leakage are estimated by actual measurements. This calorimeter measures the absolute power of the THz waves by substituting dc power, based on the isothermal temperature control technique. A commercial power meter with a WR-03 waveguide is calibrated by direct comparison with the calorimeter at a power level of 0.1 mW. The calibration factors of the commercial power meter are evaluated in the frequency range, 220-330 GHz. The associated uncertainties of the calibration factors are estimated by combining the measurement uncertainty factors using the Monte Carlo method. The relative expanded uncertainties are less than 7.2% with a coverage factor of two.
Published in: IEEE Transactions on Instrumentation and Measurement ( Volume: 67, Issue: 6, June 2018)
Page(s): 1451 - 1460
Date of Publication: 05 February 2018

ISSN Information:


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