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Paper Abstract and Keywords
Presentation 2026-01-23 10:55
[Special Talk] Improved Characteristics of a Multi-Stage Quarter-Wave Transformer Using Tapered Elements
Junichiro Matsuki, Koji Wada (UEC) ED2025-76 MW2025-187
Abstract (in Japanese) (See Japanese page) 
(in English) Microwave Circuit Design Universiade 2025 required the design of a wider-bandwidth, lower-insertion-loss matching circuit for a substrate with known impedance. This presentation describes a design methodology for a wideband matching circuit using tapered lines and a multi-stage quarter-wave transformer. It also reports on the design and prototyping techniques employed to achieve a high score in the contest.
Keyword (in Japanese) (See Japanese page) 
(in English) Microstrip Line / Microstrip Line，Matching circuit / Taper / Quarter-wave transformer / / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 327, MW2025-187, pp. 64-68, Jan. 2026.
Paper # MW2025-187 
Date of Issue 2026-01-15 (ED, MW) 
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 ED2025-76 MW2025-187

Conference Information
Committee ED MW  
Conference Date 2026-01-22 - 2026-01-23 
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 2026-01-ED-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Improved Characteristics of a Multi-Stage Quarter-Wave Transformer Using Tapered Elements 
Sub Title (in English)  
Keyword(1) Microstrip Line  
Keyword(2) Microstrip Line，Matching circuit  
Keyword(3) Taper  
Keyword(4) Quarter-wave transformer  
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Keyword(8)  
1st Author's Name Junichiro Matsuki  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Koji Wada  
2nd Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2026-01-23 10:55:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # ED2025-76, MW2025-187 
Volume (vol) vol.125 
Number (no) no.326(ED), no.327(MW) 
Page pp.64-68 
#Pages 5 
Date of Issue 2026-01-15 (ED, MW) 

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