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| Presentation | 2008-01-24 16:10 Calculations of SAR in a Fetus by a Normal-Mode Helical Antenna with a Metallic Case close to the Abdomen of a Pregnant Woman Shimpei Akimoto (Chiba Univ.), Tomoaki Nagaoka (NICT), Satoshi Nakata, Satoru Kikuchi, Kazuyuki Saito (Chiba Univ.), Soichi Watanabe (NICT), Masaharu Takahashi, Koichi Ito (Chiba Univ.)  AP2007-147 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | In the past few years, the radio frequency (RF) devices, which are usually hold in the vicinity of a human body, are increasing, the specific absorption rate (SAR) evaluation of the fetus in the pregnant woman is one of the most important research themes that needs to be taken under consideration. For example, when the wireless radio terminal for business purposes is used on the abdomen of pregnant woman, the electromagnetic wave of this devices penetrates to the deep region of the human body especially the fetus, because the wavelength of the electromagnetic wave of the device operated in VHF band is longer than that of the cellular phone operated at GHz band. In this paper, in order to evaluate the SAR in the pregnant woman and her fetus when wearing the wireless radio terminal on her abdomen, the SAR distribution in the fetus is calculated using the numerical model of the pregnant woman by exposed to near-field of a normal mode helical antenna (NHA) with a metallic case at 150 MHz. In addition, the SAR in the fetus will be evaluated under various positions of the fetus and placenta. As a result, it has been confirmed that the position of NHA affects a substantial change in the tendency of the SAR distribution in deep region of the maternal body. In addition, it has been found that the fetus averaged SAR when the placenta is in the an-tenna side is lower than that is in the maternal back side. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Pregnant Woman / Fetus / Normal-Mode Helical Antenna / SAR / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 107, no. 431, AP2007-147, pp. 147-152, Jan. 2008. | |
| Paper # | AP2007-147 | |
| Date of Issue | 2008-01-16 (AP) | |
| ISSN | Print edition: ISSN 0913-5685 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) | |
| Download PDF | AP2007-147 |
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| Conference Information | |
| Committee | AP |
| Conference Date | 2008-01-23 - 2008-01-25 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tyeruru.(Naha) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | etc. |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2008-01-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Calculations of SAR in a Fetus by a Normal-Mode Helical Antenna with a Metallic Case close to the Abdomen of a Pregnant Woman |
| Sub Title (in English) | |
| Keyword(1) | Pregnant Woman |
| Keyword(2) | Fetus |
| Keyword(3) | Normal-Mode Helical Antenna |
| Keyword(4) | SAR |
| Keyword(5) | |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Shimpei Akimoto |
| 1st Author's Affiliation | Chiba University (Chiba Univ.) |
| 2nd Author's Name | Tomoaki Nagaoka |
| 2nd Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
| 3rd Author's Name | Satoshi Nakata |
| 3rd Author's Affiliation | Chiba University (Chiba Univ.) |
| 4th Author's Name | Satoru Kikuchi |
| 4th Author's Affiliation | Chiba University (Chiba Univ.) |
| 5th Author's Name | Kazuyuki Saito |
| 5th Author's Affiliation | Chiba University (Chiba Univ.) |
| 6th Author's Name | Soichi Watanabe |
| 6th Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
| 7th Author's Name | Masaharu Takahashi |
| 7th Author's Affiliation | Chiba University (Chiba Univ.) |
| 8th Author's Name | Koichi Ito |
| 8th Author's Affiliation | Chiba University (Chiba Univ.) |
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| Speaker | Author-1 |
| Date Time | 2008-01-24 16:10:00 |
| Presentation Time | 20 minutes |
| Registration for | AP |
| Paper # | AP2007-147 |
| Volume (vol) | vol.107 |
| Number (no) | no.431 |
| Page | pp.147-152 |
| #Pages | 6 |
| Date of Issue | 2008-01-16 (AP) |
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