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Paper Abstract and Keywords
Presentation 2026-06-03 15:45
Effect of Transmission-Line Delay on Sub-Mode Spacing in a Phase-Conjugate Loop
Takayuki Matsumuro, Susumu Ano (ATR) WPT2026-13
Abstract (in Japanese) (See Japanese page) 
(in English) In a phase-conjugate loop, the propagation phase is canceled for the main mode, whereas a residual phase remains for frequency-offset components, resulting in sub-modes. In this paper, focusing on the fact that the sub-mode spacing is determined by the effective delay of the loop, the relationship is investigated by circuit simulation. The effective delay was evaluated from the open-loop S-parameters, and the spacing of multiple peaks observed in the closed-loop oscillation spectrum was found to be in good agreement with the estimated value. In addition, as a basic study toward experiments, measured delay times of optical-fiber delay-line systems with different lengths are reported.
Keyword (in Japanese) (See Japanese page) 
(in English) phase-conjugate loop / sub-mode / effective delay / transmission delay / optical-fiber delay line system / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 53, WPT2026-13, pp. 19-22, June 2026.
Paper # WPT2026-13 
Date of Issue 2026-05-27 (WPT) 
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 WPT2026-13

Conference Information
Committee WPT  
Conference Date 2026-06-03 - 2026-06-03 
Place (in Japanese) (See Japanese page) 
Place (in English) Online (changed from Ishigaki Civic Hall) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Wireless Power Transfer, etc 
Paper Information
Registration To WPT 
Conference Code 2026-06-WPT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effect of Transmission-Line Delay on Sub-Mode Spacing in a Phase-Conjugate Loop 
Sub Title (in English)  
Keyword(1) phase-conjugate loop  
Keyword(2) sub-mode  
Keyword(3) effective delay  
Keyword(4) transmission delay  
Keyword(5) optical-fiber delay line system  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Takayuki Matsumuro  
1st Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
2nd Author's Name Susumu Ano  
2nd Author's Affiliation Advanced Telecommunications Research Institute International (ATR)
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Speaker Author-1 
Date Time 2026-06-03 15:45:00 
Presentation Time 25 minutes 
Registration for WPT 
Paper # WPT2026-13 
Volume (vol) vol.126 
Number (no) no.53 
Page pp.19-22 
#Pages 4 
Date of Issue 2026-05-27 (WPT) 

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