IEICE TRANSACTIONS on Communications
Specific Absorption Rates and Temperature Elevations due to Wireless Radio Terminals in Proximity to a Fetus at Gestational Ages of 13, 18, and 26 Weeks
Summary :
As the electromagnetic (EM) environment is becoming increasingly diverse, it is essential to estimate specific absorption rates (SARs) and temperature elevations of pregnant females and their fetuses under various exposure situations. This study presents calculated SARs and temperature elevations in a fetus exposed to EM waves. The calculations involved numerical models for the anatomical structures of a pregnant Japanese woman at gestational stages of 13, 18, and 26 weeks; the EM source was a wireless portable terminal placed close to the abdomen of the pregnant female model. The results indicate that fetal SARs and temperature elevations are closely related to the position of the fetus relative to the EM source. We also found that, although the fetal SAR caused by a half-wavelength dipole antenna is sometimes comparable to or slightly more than the International Commission Non-Ionizing Radiation Protection guidelines, it is lower than the guideline level in more realistic situations, such as when a planar inverted-F antenna is used. Furthermore, temperature elevations were significantly below the threshold set to prevent the child from being born with developmental disabilities.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E97-B No.10 pp.2175-2183
- Publication Date
- 2014/10/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E97.B.2175
- Type of Manuscript
- PAPER
- Category
- Electromagnetic Compatibility(EMC)
Authors
Akihiro TATENO
Chiba University
Shimpei AKIMOTO
Mitsubishi Electric Corporation
Tomoaki NAGAOKA
National Institute of Information and Communications Technology
Kazuyuki SAITO
Chiba University
Soichi WATANABE
National Institute of Information and Communications Technology
Masaharu TAKAHASHI
Chiba University
Koichi ITO
Chiba University
Keyword
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Akihiro TATENO, Shimpei AKIMOTO, Tomoaki NAGAOKA, Kazuyuki SAITO, Soichi WATANABE, Masaharu TAKAHASHI, Koichi ITO, "Specific Absorption Rates and Temperature Elevations due to Wireless Radio Terminals in Proximity to a Fetus at Gestational Ages of 13, 18, and 26 Weeks" in IEICE TRANSACTIONS on Communications,
vol. E97-B, no. 10, pp. 2175-2183, October 2014, doi: 10.1587/transcom.E97.B.2175.
Abstract: As the electromagnetic (EM) environment is becoming increasingly diverse, it is essential to estimate specific absorption rates (SARs) and temperature elevations of pregnant females and their fetuses under various exposure situations. This study presents calculated SARs and temperature elevations in a fetus exposed to EM waves. The calculations involved numerical models for the anatomical structures of a pregnant Japanese woman at gestational stages of 13, 18, and 26 weeks; the EM source was a wireless portable terminal placed close to the abdomen of the pregnant female model. The results indicate that fetal SARs and temperature elevations are closely related to the position of the fetus relative to the EM source. We also found that, although the fetal SAR caused by a half-wavelength dipole antenna is sometimes comparable to or slightly more than the International Commission Non-Ionizing Radiation Protection guidelines, it is lower than the guideline level in more realistic situations, such as when a planar inverted-F antenna is used. Furthermore, temperature elevations were significantly below the threshold set to prevent the child from being born with developmental disabilities.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E97.B.2175/_p
Copy
@ARTICLE{e97-b_10_2175,
author={Akihiro TATENO, Shimpei AKIMOTO, Tomoaki NAGAOKA, Kazuyuki SAITO, Soichi WATANABE, Masaharu TAKAHASHI, Koichi ITO, },
journal={IEICE TRANSACTIONS on Communications},
title={Specific Absorption Rates and Temperature Elevations due to Wireless Radio Terminals in Proximity to a Fetus at Gestational Ages of 13, 18, and 26 Weeks},
year={2014},
volume={E97-B},
number={10},
pages={2175-2183},
abstract={As the electromagnetic (EM) environment is becoming increasingly diverse, it is essential to estimate specific absorption rates (SARs) and temperature elevations of pregnant females and their fetuses under various exposure situations. This study presents calculated SARs and temperature elevations in a fetus exposed to EM waves. The calculations involved numerical models for the anatomical structures of a pregnant Japanese woman at gestational stages of 13, 18, and 26 weeks; the EM source was a wireless portable terminal placed close to the abdomen of the pregnant female model. The results indicate that fetal SARs and temperature elevations are closely related to the position of the fetus relative to the EM source. We also found that, although the fetal SAR caused by a half-wavelength dipole antenna is sometimes comparable to or slightly more than the International Commission Non-Ionizing Radiation Protection guidelines, it is lower than the guideline level in more realistic situations, such as when a planar inverted-F antenna is used. Furthermore, temperature elevations were significantly below the threshold set to prevent the child from being born with developmental disabilities.},
keywords={},
doi={10.1587/transcom.E97.B.2175},
ISSN={1745-1345},
month={October},}
Copy
TY - JOUR
TI - Specific Absorption Rates and Temperature Elevations due to Wireless Radio Terminals in Proximity to a Fetus at Gestational Ages of 13, 18, and 26 Weeks
T2 - IEICE TRANSACTIONS on Communications
SP - 2175
EP - 2183
AU - Akihiro TATENO
AU - Shimpei AKIMOTO
AU - Tomoaki NAGAOKA
AU - Kazuyuki SAITO
AU - Soichi WATANABE
AU - Masaharu TAKAHASHI
AU - Koichi ITO
PY - 2014
DO - 10.1587/transcom.E97.B.2175
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E97-B
IS - 10
JA - IEICE TRANSACTIONS on Communications
Y1 - October 2014
AB - As the electromagnetic (EM) environment is becoming increasingly diverse, it is essential to estimate specific absorption rates (SARs) and temperature elevations of pregnant females and their fetuses under various exposure situations. This study presents calculated SARs and temperature elevations in a fetus exposed to EM waves. The calculations involved numerical models for the anatomical structures of a pregnant Japanese woman at gestational stages of 13, 18, and 26 weeks; the EM source was a wireless portable terminal placed close to the abdomen of the pregnant female model. The results indicate that fetal SARs and temperature elevations are closely related to the position of the fetus relative to the EM source. We also found that, although the fetal SAR caused by a half-wavelength dipole antenna is sometimes comparable to or slightly more than the International Commission Non-Ionizing Radiation Protection guidelines, it is lower than the guideline level in more realistic situations, such as when a planar inverted-F antenna is used. Furthermore, temperature elevations were significantly below the threshold set to prevent the child from being born with developmental disabilities.
ER -
English
