Paper Abstract and Keywords |
Presentation |
2024-12-13 15:25
Verification for hand SAR measurement validity using commercially available smartphones Yuto Shimizu, Tetsuo Saji, Tomoaki Nagaoka (NICT) EMCJ2024-91 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
The specific absorption rate (SAR) is used for an assessment of human exposure from wireless communication devices in the frequency range from 700 MHz to 6 GHz that is used for mobile communications. Wireless devices used near a human body are required to assess human exposure. Currently, Hand SAR evaluation procedure is discussed in the international standard for the conformity assessment using SAR. Note that, Hand SAR is the exposure value of the hand when the smartphone is held by the hand. This study aims to validate the Hand SAR evaluation procedure currently discussed. Firstly, 10 g averaged SAR was measured using 34 types of commercially available smartphones with changing the flat phantom and the plane relative to the smartphone. The measurement data show that the highest frequency of 10 g averaged SAR was obtained when the opposite side of the smartphone to the LCD was relative to the phantom. The result was valid according to the antenna arrangement in the smartphone. In addition, the effect of the separation distance on SAR measurement was checked. The result in this measurement confirmed that 10 g averaged SAR without spacer was as twice as that with the spacer. Finally, we evaluated whether the worst-case values were missed due to the narrowing of measurement conditions in the evaluation methods currently under consideration. It was denoted that the worst value was evaluated in around 95% of the measurement conditions in this study. These results show that the Hand SAR measurement procedure currently under consideration is almost valid. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
conformity assessment / SAR measurement / / / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 124, no. 304, EMCJ2024-91, pp. 13-17, Dec. 2024. |
Paper # |
EMCJ2024-91 |
Date of Issue |
2024-12-06 (EMCJ) |
ISSN |
Online edition: ISSN 2432-6380 |
Copyright and 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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EMCJ2024-91 |
Conference Information |
Committee |
EMCJ IEE-EMC |
Conference Date |
2024-12-13 - 2024-12-13 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
NIFS |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
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Paper Information |
Registration To |
EMCJ |
Conference Code |
2024-12-EMCJ-EMC |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Verification for hand SAR measurement validity using commercially available smartphones |
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conformity assessment |
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SAR measurement |
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1st Author's Name |
Yuto Shimizu |
1st Author's Affiliation |
NICT (NICT) |
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Tetsuo Saji |
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NICT (NICT) |
3rd Author's Name |
Tomoaki Nagaoka |
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Speaker |
Author-1 |
Date Time |
2024-12-13 15:25:00 |
Presentation Time |
25 minutes |
Registration for |
EMCJ |
Paper # |
EMCJ2024-91 |
Volume (vol) |
vol.124 |
Number (no) |
no.304 |
Page |
pp.13-17 |
#Pages |
5 |
Date of Issue |
2024-12-06 (EMCJ) |