Discrepancies of Measured SAR between Traditional and Fast Measuring Systems

Zicheng Liu, Djamel Allal, Maurice Cox and Joe Wiart
Additional contact information
Zicheng Liu: Chaire C2M, LTCI, Télécom Paris, 91120 Palaiseau, France
Djamel Allal: Laboratoire National de Métrologie et d’Essais, 78197 Trappes, France
Maurice Cox: National Physical Laboratory, Teddington TW11 0LW, UK
Joe Wiart: Chaire C2M, LTCI, Télécom Paris, 91120 Palaiseau, France

IJERPH, 2020, vol. 17, issue 6, 1-13

Abstract: 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.

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
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.mdpi.com/1660-4601/17/6/2111/pdf (application/pdf)
https://www.mdpi.com/1660-4601/17/6/2111/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jijerp:v:17:y:2020:i:6:p:2111-:d:335695

Access Statistics for this article

IJERPH is currently edited by Ms. Jenna Liu

More articles in IJERPH from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().