Holloway, C.
, Simons, M.
, Novotny, D.
, Lehman, J.
, Williams, P.
and Shaw, G.
(2018),
Using Radiation Pressure to Develop a Radio-Frequency Power Measurement Technique Traceable to the Redefined SI, Applied Physics Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=926474
(Accessed October 27, 2025)
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Using Radiation Pressure to Develop a Radio-Frequency Power Measurement Technique Traceable to the Redefined SI
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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
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Journals
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Keywords
radiation pressure, SI, quantum SI, power metrology
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Created October 15, 2018, Updated March 7, 2019