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| Presentation | 2008-06-20 16:55 Estimation of Antenna Gain in the Liquid Using the Measured Data in the Far-Field Region by the Network Analyzer Naoto Ikarashi, Tsuyoshi Nagano (Niigata Univ.), Nozomu Ishii (Niigata Univ./NICT), Ken-ichi Sato (NTT-AT), Lira Hamada, Soichi Watanabe (NICT)  EMCJ2008-24 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | The authors have been developed a technique for calibrating electric-field probes for the measurement of the Specific Absorption Rate (SAR) of mobile communication devices by using the Friis transmission formula in the tissue equivalent liquid. In our method, reference antennas whose gain is calibrated in the liquid are used. However, due to significant decay of the electromagnetic wave in the liquid, it is difficult to measure the power transmission between the two antennas in the far-field region, where the conventional Friis transmission formula can be used. The authors extended the formula to apply it in the near-field region. In our paper, we realize the measurement in the far-field region by inserting a power amplifier in our conventional measurement system with a vector network analyzer and enhance the dynamic range of our system. Furthermore, we estimate the gain of the reference antenna using the data measured in the near-field and far-field regions and comfirm the validity of our extended Friis transmission formula. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | SAR / antenna in the tissue equivalent liquid / far-field gain / near-field gain / Friis transmission formula / least square method / / | |
| Reference Info. | IEICE Tech. Rep., vol. 108, no. 97, EMCJ2008-24, pp. 99-104, June 2008. | |
| Paper # | EMCJ2008-24 | |
| Date of Issue | 2008-06-13 (EMCJ) | |
| 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 | EMCJ2008-24 |
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| Conference Information | |
| Committee | EMCJ |
| Conference Date | 2008-06-20 - 2008-06-20 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Hokkaido Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Paper Information | |
| Registration To | EMCJ |
| Conference Code | 2008-06-EMCJ |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Estimation of Antenna Gain in the Liquid Using the Measured Data in the Far-Field Region by the Network Analyzer |
| Sub Title (in English) | |
| Keyword(1) | SAR |
| Keyword(2) | antenna in the tissue equivalent liquid |
| Keyword(3) | far-field gain |
| Keyword(4) | near-field gain |
| Keyword(5) | Friis transmission formula |
| Keyword(6) | least square method |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Naoto Ikarashi |
| 1st Author's Affiliation | Niigata University (Niigata Univ.) |
| 2nd Author's Name | Tsuyoshi Nagano |
| 2nd Author's Affiliation | Niigata University (Niigata Univ.) |
| 3rd Author's Name | Nozomu Ishii |
| 3rd Author's Affiliation | Niigata University/National Institute of Information and Communications Technology (Niigata Univ./NICT) |
| 4th Author's Name | Ken-ichi Sato |
| 4th Author's Affiliation | NTT Advanced Technology (NTT-AT) |
| 5th Author's Name | Lira Hamada |
| 5th Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
| 6th Author's Name | Soichi Watanabe |
| 6th Author's Affiliation | National Institute of Information and Communications Technology (NICT) |
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| Speaker | Author-1 |
| Date Time | 2008-06-20 16:55:00 |
| Presentation Time | 25 minutes |
| Registration for | EMCJ |
| Paper # | EMCJ2008-24 |
| Volume (vol) | vol.108 |
| Number (no) | no.97 |
| Page | pp.99-104 |
| #Pages | 6 |
| Date of Issue | 2008-06-13 (EMCJ) |
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