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Paper Abstract and Keywords
Presentation 2025-10-24 16:45
Antenna Decoupling Network Using Even and Odd Modes Transmission Line Resonators Terminated by a Reactance Element
Jun Iijima, Maodudul Hasan (TUT), Hiromasa Saeki, Kenji Katsumura (Murata), Masaya Tamura (TUT) EMCJ2025-68 MW2025-154 EST2025-81
Abstract (in Japanese) (See Japanese page) 
(in English) This paper describes an antenna decoupling network using even and odd modes transmission line resonators terminated by a reactance element. This decoupling network consists of a single-stage parallel network and is designed using theoretical equations. The design was performed for a 2.4 GHz band monopole antenna. First, the mutual admittance of the decoupling network was formulated, and the simultaneous equations for the desired decoupling characteristics were solved. Next, the decoupling network was designed in a circuit simulator based on the obtained solution, achieving decoupling of -20.5 dB over 2.4 - 2.5 GHz. Finally, in electromagnetic simulation, decoupling of -20.1 dB was achieved over 2.4 - 2.5 GHz. The designed decoupling network is smaller than that of other decoupling networks.
Keyword (in Japanese) (See Japanese page) 
(in English) multiple-input multiple-output / antenna coupling / decoupling network / transmission line / resonance / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 209, MW2025-154, pp. 163-168, Oct. 2025.
Paper # MW2025-154 
Date of Issue 2025-10-16 (EMCJ, MW, EST) 
ISSN Online edition: ISSN 2432-6380
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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)
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Conference Information
Committee EMCJ MW EST IEE-EMC  
Conference Date 2025-10-23 - 2025-10-24 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To MW 
Conference Code 2025-10-EMCJ-MW-EST-EMC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Antenna Decoupling Network Using Even and Odd Modes Transmission Line Resonators Terminated by a Reactance Element 
Sub Title (in English)  
Keyword(1) multiple-input multiple-output  
Keyword(2) antenna coupling  
Keyword(3) decoupling network  
Keyword(4) transmission line  
Keyword(5) resonance  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Jun Iijima  
1st Author's Affiliation Toyohashi University of Technology (TUT)
2nd Author's Name Maodudul Hasan  
2nd Author's Affiliation Toyohashi University of Technology (TUT)
3rd Author's Name Hiromasa Saeki  
3rd Author's Affiliation Murata Manufacturing Co., Ltd. (Murata)
4th Author's Name Kenji Katsumura  
4th Author's Affiliation Murata Manufacturing Co., Ltd. (Murata)
5th Author's Name Masaya Tamura  
5th Author's Affiliation Toyohashi University of Technology (TUT)
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Speaker Author-1 
Date Time 2025-10-24 16:45:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # EMCJ2025-68, MW2025-154, EST2025-81 
Volume (vol) vol.125 
Number (no) no.208(EMCJ), no.209(MW), no.210(EST) 
Page pp.163-168 
#Pages 6 
Date of Issue 2025-10-16 (EMCJ, MW, EST) 

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