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Discrepancies of Measured SAR between Traditional and Fast Measuring Systems
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...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143529/ https://www.ncbi.nlm.nih.gov/pubmed/32235815 http://dx.doi.org/10.3390/ijerph17062111 |
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author | Liu, Zicheng Allal, Djamel Cox, Maurice Wiart, Joe |
author_facet | Liu, Zicheng Allal, Djamel Cox, Maurice Wiart, Joe |
author_sort | Liu, Zicheng |
collection | PubMed |
description | 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. |
format | Online Article Text |
id | pubmed-7143529 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-71435292020-04-14 Discrepancies of Measured SAR between Traditional and Fast Measuring Systems Liu, Zicheng Allal, Djamel Cox, Maurice Wiart, Joe Int J Environ Res Public Health Article 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. MDPI 2020-03-22 2020-03 /pmc/articles/PMC7143529/ /pubmed/32235815 http://dx.doi.org/10.3390/ijerph17062111 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Liu, Zicheng Allal, Djamel Cox, Maurice Wiart, Joe Discrepancies of Measured SAR between Traditional and Fast Measuring Systems |
title | Discrepancies of Measured SAR between Traditional and Fast Measuring Systems |
title_full | Discrepancies of Measured SAR between Traditional and Fast Measuring Systems |
title_fullStr | Discrepancies of Measured SAR between Traditional and Fast Measuring Systems |
title_full_unstemmed | Discrepancies of Measured SAR between Traditional and Fast Measuring Systems |
title_short | Discrepancies of Measured SAR between Traditional and Fast Measuring Systems |
title_sort | discrepancies of measured sar between traditional and fast measuring systems |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7143529/ https://www.ncbi.nlm.nih.gov/pubmed/32235815 http://dx.doi.org/10.3390/ijerph17062111 |
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