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Paper Abstract and Keywords
Presentation 2018-04-20 09:55
A Study of Antennas for Wireless Communication and Propagation Model in Seawater
Naomichi Fujii, Hiroyasu Sato, Qiang Chen (Tohoku Univ.), Nozomu Ishii (Niigata Univ.), Masaharu Takahashi (Chiba Univ.), Hiroshi Yoshida, Ryotaro Suga (JAMSTEC) AP2018-5
Abstract (in Japanese) (See Japanese page) 
(in English) In recent years, wireless communications in seawater by using electromagnetic waves has been studied because a robust communication method in seawater has been desired. In seawater, the higher frequency is, the stronger attenuation electromagnetic waves have. To extend propagation distance, lower frequencies should be used if bandwidth allows.
However, the wavelength of lower frequency electromagnetic wave is too long to use antennas that adjusted to its wavelength even in seawater. Therefore, antennas in seawater are usually small antennas, so matching circuits are required. In this report, the propagation characteristics between small antennas in seawater are simulated. And transmission efficiencies are calculated when matching circuits that include losses are connected to these antennas.
Keyword (in Japanese) (See Japanese page) 
(in English) Matching circuit / Dipole antenna / Loop antenna / Underwater communication / / / /  
Reference Info. IEICE Tech. Rep., vol. 118, no. 5, AP2018-5, pp. 23-28, April 2018.
Paper # AP2018-5 
Date of Issue 2018-04-12 (AP) 
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)
Download PDF AP2018-5

Conference Information
Committee AP  
Conference Date 2018-04-19 - 2018-04-20 
Place (in Japanese) (See Japanese page) 
Place (in English) Hachijomachi-Shokokai 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2018-04-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Study of Antennas for Wireless Communication and Propagation Model in Seawater 
Sub Title (in English)  
Keyword(1) Matching circuit  
Keyword(2) Dipole antenna  
Keyword(3) Loop antenna  
Keyword(4) Underwater communication  
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1st Author's Name Naomichi Fujii  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Hiroyasu Sato  
2nd Author's Affiliation Tohoku University (Tohoku Univ.)
3rd Author's Name Qiang Chen  
3rd Author's Affiliation Tohoku University (Tohoku Univ.)
4th Author's Name Nozomu Ishii  
4th Author's Affiliation Niigata University (Niigata Univ.)
5th Author's Name Masaharu Takahashi  
5th Author's Affiliation Chiba University (Chiba Univ.)
6th Author's Name Hiroshi Yoshida  
6th Author's Affiliation Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
7th Author's Name Ryotaro Suga  
7th Author's Affiliation Japan Agency for Marine-Earth Science and Technology (JAMSTEC)
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Speaker Author-2 
Date Time 2018-04-20 09:55:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2018-5 
Volume (vol) vol.118 
Number (no) no.5 
Page pp.23-28 
#Pages 6 
Date of Issue 2018-04-12 (AP) 

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