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Paper Abstract and Keywords
Presentation 2010-01-22 15:35
Calculation of Whole-Body Average SARs in Infant Models for Far-Field Exposure at Over GHz Frequencies in View of Vertical/Horizontal Polarization
Naoki Ito, Akimasa Hirata, Osamu Fujiwara (Nagoya Inst. of Tech.), Tomoaki Nagaoka, Soichi Watanabe (NICT) EMCJ2009-123
Abstract (in Japanese) (See Japanese page) 
(in English) With much concern about health effects of children for radio-wave exposure, analytical studies on whole-body averaged specific absorption rates (WBA-SARs) in anatomical based child models have actively been conducted. Based on an anatomically-based Japanese model of three-year-old child, we developed linearly reduced models corresponding to nine-month Japanese 9-month and 0-month infants, and showed the frequency characteristics of 0.3-6GHz WBA-SARs for far-field exposure. In this study, in view of electromagnetic exposure polarization we calculated WBA-SARs up to 15 GHz in Japanese 3years, 9-month and 0-month infant models with a resolution of 1 mm/0.25 mm, and compared them with those estimated from our previously proposed formula for WBA-SARs. As a result, we found that horizontal exposure polarization provides larger WBA-SARs in infant models than vertical one does, and the WBA-SARs have flat characteristics in the frequency range from 1 GHz to 3 GHz, which become almost kept constant at over 10 GHz after decreasing with frequencies. It was also found that the estimated WBA-SARs from the formula are conservative despite exposure polarization. The finding obtained for WBA-SARs in newborn models suggests that the reference level at 0.8 GHz in general public exposure should be employed also for the levels at over GHz bands.
Keyword (in Japanese) (See Japanese page) 
(in English) Far-field exposure / polarization / Infant / whole-body averaged SAR / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 370, EMCJ2009-123, pp. 145-149, Jan. 2010.
Paper # EMCJ2009-123 
Date of Issue 2010-01-14 (EMCJ) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee EMCJ  
Conference Date 2010-01-21 - 2010-01-22 
Place (in Japanese) (See Japanese page) 
Place (in English) University of the Ryukyus 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMCJ 
Conference Code 2010-01-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Calculation of Whole-Body Average SARs in Infant Models for Far-Field Exposure at Over GHz Frequencies in View of Vertical/Horizontal Polarization 
Sub Title (in English)  
Keyword(1) Far-field exposure  
Keyword(2) polarization  
Keyword(3) Infant  
Keyword(4) whole-body averaged SAR  
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Keyword(8)  
1st Author's Name Naoki Ito  
1st Author's Affiliation Nagoya Institute of Technology (Nagoya Inst. of Tech.)
2nd Author's Name Akimasa Hirata  
2nd Author's Affiliation Nagoya Institute of Technology (Nagoya Inst. of Tech.)
3rd Author's Name Osamu Fujiwara  
3rd Author's Affiliation Nagoya Institute of Technology (Nagoya Inst. of Tech.)
4th Author's Name Tomoaki Nagaoka  
4th Author's Affiliation National Institute of Information and Communications Technology (NICT)
5th Author's Name Soichi Watanabe  
5th Author's Affiliation National Institute of Information and Communications Technology (NICT)
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Speaker Author-1 
Date Time 2010-01-22 15:35:00 
Presentation Time 25 minutes 
Registration for EMCJ 
Paper # EMCJ2009-123 
Volume (vol) vol.109 
Number (no) no.370 
Page pp.145-149 
#Pages 5 
Date of Issue 2010-01-14 (EMCJ) 

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