Comment on Liu et al. “Discrepancies of Measured SAR between Traditional and Fast Measuring Systems.” Int. J. Environ. Res. Public Health, 2020, 17, 2111

Mark Douglas and Niels Kuster
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Mark Douglas: Foundation for Research on Information Technologies in Society, 8004 Zurich, Switzerland
Niels Kuster: Foundation for Research on Information Technologies in Society, 8004 Zurich, Switzerland

IJERPH, 2020, vol. 17, issue 14, 1-4

Abstract: An article published in the International Journal of Environmental Research and Public Health compares two types of specific absorption rate measurement systems—a fast system using a time-domain array and a traditional system using probe scanning. While the time-domain array system is analyzed in detail under idealized conditions, the probe-scanning system evaluation used a fixed set of scanning and evaluation parameters that are not fully compliant with the requirements of the published standards. This leads to a false comparison and the incorrect conclusion that time-domain array systems can be theoretically more accurate than probe-scanning systems. We have repeated the analysis applied in the paper using the same raw data but with state-of-the art scanning and evaluation parameters. The results confirm the high accuracy of probe-scanning systems for any field distribution. Due to the high precision, robustness, and reliability of probe-scanning systems, the results of these systems are often referred to as reference results.

Keywords: specific absorption rate; fast SAR measurement; field reconstruction; plane-wave expansion; traditional SAR measurement; measurement discrepancy; uncertainty analysis (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2020
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