Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2019-10-24 10:55
Efficiency Enhancement of GaN Doherty Power Amplifier at Large Power Back-Off with Virtual Short Stub Technique
Satoru Honda, Shuichi Sakata, Yuji Komatsuzaki, Shintaro Shinjo (Mitsubishi Electric) EMCJ2019-40 MW2019-69 EST2019-48
Abstract (in Japanese) (See Japanese page) 
(in English) We propose a new efficiency enhancement technique of Doherty power amplifiers (DPAs) using virtual short stub. In this technique, the peaking amplifier branch is utilized as an inductive short stub at output power combing point at low power level. Using this technique, it is possible to transform the low-power load impedance seen from the carrier amplifier into higher impedance than that of classical DPAs. This leads to efficiency enhancement at larger power back-off than conventional DPAs (>6dB). The relation of efficiency enhanced level and the circuit topology for DPAs with the virtual short stub are analytically derived. The proposed technique was experimentally verified by fabricating a 3.5 GHz 40 Watt Doherty power amplifier using GaN HEMTs. An average drain efficiency of 51% and adjacent power leakage ratio of -50 dBc was obtained using 10MHz LTE test signals with 8.5dB peak-to-average power ratio.
Keyword (in Japanese) (See Japanese page) 
(in English) Doherty power amplifiers / efficiency / power back-off / load modulation / virtual short stub / GaN / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 242, MW2019-69, pp. 21-25, Oct. 2019.
Paper # MW2019-69 
Date of Issue 2019-10-17 (EMCJ, MW, EST) 
ISSN Print edition: ISSN 0913-5685    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 EMCJ2019-40 MW2019-69 EST2019-48

Conference Information
Committee EMCJ MW EST IEE-EMC  
Conference Date 2019-10-24 - 2019-10-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Gakuin University(Conf. Room 2, Eng. Bldg. 1) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) EMC, Microwave, Electromagnetic field simulation. 
Paper Information
Registration To MW 
Conference Code 2019-10-EMCJ-MW-EST-EMC 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Efficiency Enhancement of GaN Doherty Power Amplifier at Large Power Back-Off with Virtual Short Stub Technique 
Sub Title (in English)  
Keyword(1) Doherty power amplifiers  
Keyword(2) efficiency  
Keyword(3) power back-off  
Keyword(4) load modulation  
Keyword(5) virtual short stub  
Keyword(6) GaN  
Keyword(7)  
Keyword(8)  
1st Author's Name Satoru Honda  
1st Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
2nd Author's Name Shuichi Sakata  
2nd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
3rd Author's Name Yuji Komatsuzaki  
3rd Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
4th Author's Name Shintaro Shinjo  
4th Author's Affiliation Mitsubishi Electric Corporation (Mitsubishi Electric)
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2019-10-24 10:55:00 
Presentation Time 20 minutes 
Registration for MW 
Paper # EMCJ2019-40, MW2019-69, EST2019-48 
Volume (vol) vol.119 
Number (no) no.241(EMCJ), no.242(MW), no.243(EST) 
Page pp.21-25 
#Pages 5 
Date of Issue 2019-10-17 (EMCJ, MW, EST) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan