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Paper Abstract and Keywords
Presentation 2020-07-17 14:15
Study on Series Connected Harmonic-Tuned GaN HEMT Doherty Power Amplifier for Directly Exciting a Loop Antenna of OAM communication with Balanced Mode
Masahiro Nakada, Yoichiro Takayama, Ryo Ishikawa, Kazuhiko Honjo (UEC) EMT2020-24 MW2020-33 OPE2020-19 EST2020-24 MWP2020-24
Abstract (in Japanese) (See Japanese page) 
(in English) A series-connected harmonic-tuned GaN HEMT Doherty amplifier (DA) has been developed for directly exciting a loop antenna that generates orbital angular momentum (OAM) wave. Since the loop antenna is excited in a balanced-mode, it is expected that the loop antenna can be used as an output combine circuit instead of a balun used in the series-connected DA. For a large-capacity communication, the DA was designed so that efficiency at a back-off power level that was set to obtain a wider dynamic power range was improved, based on a proposed quarter-wave transformer less DA design and a harmonic treatment design. The fabricated DA achieved a maximum drain efficiency of 53% and a maximum power-added efficiency (PAE) of 45% with a saturation output power of 36.5 dBm. Furthermore, at an output back-off of 10 dB, the drain efficiency was 38% and the PAE was 34%.
Keyword (in Japanese) (See Japanese page) 
(in English) Doherty power amplifier / Harmonic-Tuned / GaN HEMT / Loop Antenna of OAM communication / / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 101, MW2020-33, pp. 101-106, July 2020.
Paper # MW2020-33 
Date of Issue 2020-07-09 (EMT, MW, OPE, EST, MWP) 
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 EMT2020-24 MW2020-33 OPE2020-19 EST2020-24 MWP2020-24

Conference Information
Committee EMT MW OPE EST MWP THz IEE-EMT  
Conference Date 2020-07-16 - 2020-07-17 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Light wave & Electromagnetic Wave Workshop 
Paper Information
Registration To MW 
Conference Code 2020-07-EMT-MW-OPE-EST-MWP-THz-EMT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on Series Connected Harmonic-Tuned GaN HEMT Doherty Power Amplifier for Directly Exciting a Loop Antenna of OAM communication with Balanced Mode 
Sub Title (in English)  
Keyword(1) Doherty power amplifier  
Keyword(2) Harmonic-Tuned  
Keyword(3) GaN HEMT  
Keyword(4) Loop Antenna of OAM communication  
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1st Author's Name Masahiro Nakada  
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 Ryo Ishikawa  
3rd Author's Affiliation The University of Electro-Communications (UEC)
4th Author's Name Kazuhiko Honjo  
4th Author's Affiliation The University of Electro-Communications (UEC)
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Speaker Author-1 
Date Time 2020-07-17 14:15:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # EMT2020-24, MW2020-33, OPE2020-19, EST2020-24, MWP2020-24 
Volume (vol) vol.120 
Number (no) no.100(EMT), no.101(MW), no.102(OPE), no.103(EST), no.104(MWP) 
Page pp.101-106 
#Pages 6 
Date of Issue 2020-07-09 (EMT, MW, OPE, EST, MWP) 

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