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Paper Abstract and Keywords
Presentation 2023-01-27 11:50
Estimation of Absorbed Power Density Using Geometric Optics Approximation
Yuta Akutsu (Tokyo Univ. of Agriculture and Tech), Yujiro Kushiyama (NICT), Takuji Arima, Toru Uno (Tokyo Univ. of Agriculture and Tech), Tomoaki Nagaoka (NICT) EMCJ2022-80
Abstract (in Japanese) (See Japanese page) 
(in English) The International Commission on Non-Ionizing Radiation Protection (ICNIRP) revised the international guidelines for radioactivity protection in 2020, which adopted the absorbed power density as the basic limit for local exposure to frequencies above 6 GHz. The FDTD method (Finite-difference time-domain method) requires a large computational environment to estimate the radio wave exposure (absorbed power density) in the 28 GHz band used in the 5th generation mobile communication system (5G). In order to apply the geometric-optics approximation method, which requires fewer computational resources than the FDTD method by using a high-frequency approximation, to the estimation of absorbed power density, we compared the estimation accuracy of the geometric-optics approximation method with the FDTD method using spherical and numerical human body models, and investigated the effectiveness of the geometric-optics approximation method.
Keyword (in Japanese) (See Japanese page) 
(in English) human exposure / absorbed power density(APD) / Geometric Optics / FDTD method / / / /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 372, EMCJ2022-80, pp. 45-49, Jan. 2023.
Paper # EMCJ2022-80 
Date of Issue 2023-01-20 (EMCJ) 
ISSN Online edition: ISSN 2432-6380
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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 2023-01-27 - 2023-01-27 
Place (in Japanese) (See Japanese page) 
Place (in English) WASHU BLUE RESORT 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To EMCJ 
Conference Code 2023-01-EMCJ 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Estimation of Absorbed Power Density Using Geometric Optics Approximation 
Sub Title (in English)  
Keyword(1) human exposure  
Keyword(2) absorbed power density(APD)  
Keyword(3) Geometric Optics  
Keyword(4) FDTD method  
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1st Author's Name Yuta Akutsu  
1st Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech)
2nd Author's Name Yujiro Kushiyama  
2nd Author's Affiliation National Institute of Information and Communications Technology (NICT)
3rd Author's Name Takuji Arima  
3rd Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech)
4th Author's Name Toru Uno  
4th Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. of Agriculture and Tech)
5th Author's Name Tomoaki Nagaoka  
5th Author's Affiliation National Institute of Information and Communications Technology (NICT)
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Speaker Author-1 
Date Time 2023-01-27 11:50:00 
Presentation Time 20 minutes 
Registration for EMCJ 
Paper # EMCJ2022-80 
Volume (vol) vol.122 
Number (no) no.372 
Page pp.45-49 
#Pages
Date of Issue 2023-01-20 (EMCJ) 


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