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Paper Abstract and Keywords
Presentation 2024-03-15 14:00
Eigenvalue Analysis of Radio Propagation Utilizing Hollow Cylindrical Concrete Structures in Sea Water
Nozomu Ishii, Naoki Kuzuu (Niigata Univ.), Masaharu Takahashi (Chiba Univ.), Qiaowei Yuan (Tohoku Inst. Tech.), Qiang Chen (Tohoku Univ.), Hiroshi Yoshida (JAMSTEC) AP2023-217
Abstract (in Japanese) (See Japanese page) 
(in English) This paper reports the results of an eigenmode analysis of radio propagation using a hollow cylindrical concrete structure submerged in the sea. The attenuation is so high in sea water that communication is limited to a very small area. Although communication through tethers containing optical fibers is effective for transmitting high-capacity data such as images, it may limit the range of motion of underwater drones in applications such as maintenance of concrete installed under the sea, so it is desirable to make communication partially wireless. To shed light on this problem, the authors conceived of transmitting radio waves along the hollow cylindrical concrete structure placed in sea water. In this paper, some of the eigenmodes that may exist in the concrete structure under the sea are analytically investigated, and it is shown that a cutoff phenomenon appears in the frequency characteristics of the attenuation constant as a transmission line for its higher-order modes, and that the attenuation constant for higher-order modes with similar distributions tends to degenerate beyond the cutoff frequency.
Keyword (in Japanese) (See Japanese page) 
(in English) sea water / hollow cylindrical concrete structure / radio propagation / eigenvalue analysis / / / /  
Reference Info. IEICE Tech. Rep., vol. 123, no. 441, AP2023-217, pp. 91-96, March 2024.
Paper # AP2023-217 
Date of Issue 2024-03-07 (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 AP2023-217

Conference Information
Committee AP  
Conference Date 2024-03-14 - 2024-03-15 
Place (in Japanese) (See Japanese page) 
Place (in English) UNIVERSITY OF FUKUI 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2024-03-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Eigenvalue Analysis of Radio Propagation Utilizing Hollow Cylindrical Concrete Structures in Sea Water 
Sub Title (in English)  
Keyword(1) sea water  
Keyword(2) hollow cylindrical concrete structure  
Keyword(3) radio propagation  
Keyword(4) eigenvalue analysis  
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1st Author's Name Nozomu Ishii  
1st Author's Affiliation Niigata University (Niigata Univ.)
2nd Author's Name Naoki Kuzuu  
2nd Author's Affiliation Niigata University (Niigata Univ.)
3rd Author's Name Masaharu Takahashi  
3rd Author's Affiliation Chiba University (Chiba Univ.)
4th Author's Name Qiaowei Yuan  
4th Author's Affiliation Tohoku Institute of Technology (Tohoku Inst. Tech.)
5th Author's Name Qiang Chen  
5th Author's Affiliation Tohoku University (Tohoku Univ.)
6th Author's Name Hiroshi Yoshida  
6th Author's Affiliation JAMSTEC (JAMSTEC)
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Speaker Author-1 
Date Time 2024-03-15 14:00:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2023-217 
Volume (vol) vol.123 
Number (no) no.441 
Page pp.91-96 
#Pages 6 
Date of Issue 2024-03-07 (AP) 

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