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Using Radiation Pressure to Develop a Radio-Frequency Power Measurement Technique Traceable to the Redefined SI

Published

Author(s)

Christopher L. Holloway, Matthew T. Simons, David R. Novotny, John H. Lehman, Paul A. Williams, Gordon A. Shaw

Abstract

We discuss a power measurement technique traceable to the International System of Units based on radiation pressure (or radiation force) carried by an electromagnetic wave. A measurement of radiation pressure offers the possibility for a power measurement traceable to the kilogram and to Planck's constant through the redefined SI. Towards this goal, we performed measurements of the radiation pressure from a radio-frequency (RF) electromagnetic field at three frequencies (26.5~GHz, 32.5~GHz, and 40.0~GHz) and power levels (ranging from 2~W to 25~W) using a commercially available mass scale. We show comparisons between the RF power obtained with this technique and those obtained with a conventional power meter. The results in this paper are the first step towards the realization of a more direct link to RF power within the newly redefined SI.
Citation
Applied Physics Letters

Keywords

radiation pressure, SI, quantum SI, power metrology
Created October 15, 2018, Updated March 7, 2019