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Paper Abstract and Keywords
Presentation 2012-11-21 13:30
Design Method for GHz-Band Harmonics Treatment High Efficiency Power Amplifiers Using MHz-Band Active Harmonics Load-Pull System
Ryo Ishikawa, Yoichiro Takayama, Kazuhiko Honjo (UEC) MW2012-114 Link to ES Tech. Rep. Archives: MW2012-114
Abstract (in Japanese) (See Japanese page) 
(in English) For advanced wireless communication systems and wireless power transmission applications, many types of ampli ers have been reported, such as class-F, class-E, class-J, etc. All methods to improve efficiency result in shaping voltage and current waveforms in a transistor. The amplitudes and phases of harmonic components for both waveforms cannot be determined with harmonic impedance alone, since they depend on the speci c properties of the transistor. Thus, optimum load impedance exists for each transistor. Then, the optimum load impedance for a transistor without reactive parasitics is estimated in the MHz-band by using a simple active load-pull system. And, the optimum impedance outside the transistor in the GHz-band is estimated by considering the reactive parasitics. The procedure of this method is reported.
Keyword (in Japanese) (See Japanese page) 
(in English) Microwave / Power amplifier / High efficiency / Harmonics tuning / Active load-pull / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 312, MW2012-114, pp. 1-6, Nov. 2012.
Paper # MW2012-114 
Date of Issue 2012-11-14 (MW) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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 MW2012-114 Link to ES Tech. Rep. Archives: MW2012-114

Conference Information
Committee MW  
Conference Date 2012-11-21 - 2012-11-22 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave Technologies 
Paper Information
Registration To MW 
Conference Code 2012-11-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Design Method for GHz-Band Harmonics Treatment High Efficiency Power Amplifiers Using MHz-Band Active Harmonics Load-Pull System 
Sub Title (in English)  
Keyword(1) Microwave  
Keyword(2) Power amplifier  
Keyword(3) High efficiency  
Keyword(4) Harmonics tuning  
Keyword(5) Active load-pull  
1st Author's Name Ryo Ishikawa  
1st Author's Affiliation The University of Electro-Communications (UEC)
2nd Author's Name Yoichiro Takayama  
2nd Author's Affiliation The University of Electro-Communications (UEC)
3rd Author's Name Kazuhiko Honjo  
3rd Author's Affiliation The University of Electro-Communications (UEC)
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Date Time 2012-11-21 13:30:00 
Presentation Time 30 
Registration for MW 
Paper # IEICE-MW2012-114 
Volume (vol) IEICE-112 
Number (no) no.312 
Page pp.1-6 
#Pages IEICE-6 
Date of Issue IEICE-MW-2012-11-14 

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