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Comment published on 14 July 2020, see Int. J. Environ. Res. Public Health 2020, 17(14), 5045.
Article

Discrepancies of Measured SAR between Traditional and Fast Measuring Systems

1
Chaire C2M, LTCI, Télécom Paris, 91120 Palaiseau, France
2
Laboratoire National de Métrologie et d’Essais, 78197 Trappes, France
3
National Physical Laboratory, Teddington TW11 0LW, UK
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2020, 17(6), 2111; https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph17062111
Received: 28 February 2020 / Revised: 15 March 2020 / Accepted: 16 March 2020 / Published: 22 March 2020
Human exposure to mobile devices is traditionally measured by a system in which the human body (or head) is modelled by a phantom and the energy absorbed from the device is estimated based on the electric fields measured with a single probe. Such a system suffers from low efficiency due to repeated volumetric scanning within the phantom needed to capture the absorbed energy throughout the volume. To speed up the measurement, fast SAR (specific absorption rate) measuring systems have been developed. However, discrepancies of measured results are observed between traditional and fast measuring systems. In this paper, the discrepancies in terms of post-processing procedures after the measurement of electric field (or its amplitude) are investigated. Here, the concerned fast measuring system estimates SAR based on the reconstructed field of the region of interest while the amplitude and phase of the electric field are measured on a single plane with a probe array. The numerical results presented indicate that the fast SAR measuring system has the potential to yield more accurate estimations than the traditional system, but no conclusion can be made on which kind of system is superior without knowledge of the field-reconstruction algorithms and the emitting source. View Full-Text
Keywords: specific absorption rate; fast SAR measurement; field reconstruction; plane-wave expansion; traditional SAR measurement; measurement discrepancy; uncertainty analysis specific absorption rate; fast SAR measurement; field reconstruction; plane-wave expansion; traditional SAR measurement; measurement discrepancy; uncertainty analysis
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MDPI and ACS Style

Liu, Z.; Allal, D.; Cox, M.; Wiart, J. Discrepancies of Measured SAR between Traditional and Fast Measuring Systems. Int. J. Environ. Res. Public Health 2020, 17, 2111. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph17062111

AMA Style

Liu Z, Allal D, Cox M, Wiart J. Discrepancies of Measured SAR between Traditional and Fast Measuring Systems. International Journal of Environmental Research and Public Health. 2020; 17(6):2111. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph17062111

Chicago/Turabian Style

Liu, Zicheng, Djamel Allal, Maurice Cox, and Joe Wiart. 2020. "Discrepancies of Measured SAR between Traditional and Fast Measuring Systems" International Journal of Environmental Research and Public Health 17, no. 6: 2111. https://0-doi-org.brum.beds.ac.uk/10.3390/ijerph17062111

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