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Paper Abstract and Keywords
Presentation 2026-03-05 14:40
A 1.6-2.4 GHz GaN Power Amplifier Using a CRLH Transmission Line for Simultaneous Control of Fundamental and Harmonic Loads
Katsunaru Urano, Tatsuya Itoh, Shinichi Tanaka (SIT) MW2025-204
Abstract (in Japanese) (See Japanese page) 
(in English) With the rapid advancement of mobile communication systems toward higher data rates and larger capacities, compact power amplifiers (PAs) capable of wideband and high-efficiency operation are increasingly required. Harmonic control is an effective approach for improving efficiency, and continuous-mode PAs, which maintain harmonic control over a wide frequency range, have recently attracted considerable attention. To reduce circuit size, harmonic control circuits primarily based on one-port composite right/left-handed (CRLH) transmission lines have been proposed. However, separating the circuits responsible for harmonic control and fundamental matching limits the achievable operating bandwidth. In this paper, a novel design methodology is proposed in which both harmonic control and fundamental matching are simultaneously realized within a harmonic control circuit composed of a one-port CRLH transmission line and a harmonic trap filter. A PA using a 10-W GaN HEMT is designed and fabricated, and experimental results demonstrate high-efficiency operation with a DE exceeding 70% over the 1.6–2.4 GHz frequency band, thereby confirming the effectiveness of the proposed approach.
Keyword (in Japanese) (See Japanese page) 
(in English) broadband / power amplifiers / Harmonic processing / CRLH transmission lines / HEMT / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 394, MW2025-204, pp. 45-50, March 2026.
Paper # MW2025-204 
Date of Issue 2026-02-26 (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 MW2025-204

Conference Information
Committee MW  
Conference Date 2026-03-05 - 2026-03-06 
Place (in Japanese) (See Japanese page) 
Place (in English) Setoda city hall 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, etc. 
Paper Information
Registration To MW 
Conference Code 2026-03-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A 1.6-2.4 GHz GaN Power Amplifier Using a CRLH Transmission Line for Simultaneous Control of Fundamental and Harmonic Loads 
Sub Title (in English)  
Keyword(1) broadband  
Keyword(2) power amplifiers  
Keyword(3) Harmonic processing  
Keyword(4) CRLH transmission lines  
Keyword(5) HEMT  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Katsunaru Urano  
1st Author's Affiliation Shibaura Institute of Technology (SIT)
2nd Author's Name Tatsuya Itoh  
2nd Author's Affiliation Shibaura Institute of Technology (SIT)
3rd Author's Name Shinichi Tanaka  
3rd Author's Affiliation Shibaura Institute of Technology (SIT)
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Speaker Author-1 
Date Time 2026-03-05 14:40:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2025-204 
Volume (vol) vol.125 
Number (no) no.394 
Page pp.45-50 
#Pages 6 
Date of Issue 2026-02-26 (MW) 

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