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Paper Abstract and Keywords
Presentation 2022-11-15 13:50
Study on Power Consumption and Power Reduction of RF Power Amplifier in 5G Downlink System
Yuki Takagi, Yoshichika Ohta (SB) MW2022-113
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes the estimation of power consumption of RF power amplifier in downlink (from base station to UE) communication in 5G NR, and the design method for low power consumption and high efficiency of RF power amplifier. In 5G NR downlink signal when base station don't connect with the UE, compared to 4G LTE, there are significantly fewer fixed transmission signals such as reference signals. therefore, the operating time of the power amplifier is shorter and the power consumption is reduced. In this research, We consider a method of estimating the power consumption when there is no user data signal from the measurement results of the full-buffer signal input/output of the fabricated RF power amplifier. The fabricated power amplifier is the Doherty amplifier that can achieve high efficiency in a wide dynamic range, and the impedance conversion circuit in the Doherty amplifier consists of two parallel-connected T-shaped stubs that shorts the 2nd to 5th harmonics at the same connected point. The fabricated Doherty amplifier with 59.6 % drain efficiency at a saturated output power of 48.6 dBm was achieved at 1852.5 MHz. At 6.2 dB back-off condition from the saturation, 50.8 % drain efficiency was achieved. In addition, when the modulated signal output is 39.6 dBm, the spurious level up to the 5th harmonic is -15.8 dBm/MHz or less, which satisfies the radio act allowable spurious emission level.
Keyword (in Japanese) (See Japanese page) 
(in English) power amplifier / power consumption estimation / harmonic treatment / high efficiency / LDMOS / Doherty / impedance converting circuit /  
Reference Info. IEICE Tech. Rep., vol. 122, no. 250, MW2022-113, pp. 25-30, Nov. 2022.
Paper # MW2022-113 
Date of Issue 2022-11-08 (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 MW2022-113

Conference Information
Committee MW  
Conference Date 2022-11-15 - 2022-11-16 
Place (in Japanese) (See Japanese page) 
Place (in English) Fukue-Bunka-Kaikan 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Microwave, etc. 
Paper Information
Registration To MW 
Conference Code 2022-11-MW 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on Power Consumption and Power Reduction of RF Power Amplifier in 5G Downlink System 
Sub Title (in English)  
Keyword(1) power amplifier  
Keyword(2) power consumption estimation  
Keyword(3) harmonic treatment  
Keyword(4) high efficiency  
Keyword(5) LDMOS  
Keyword(6) Doherty  
Keyword(7) impedance converting circuit  
Keyword(8)  
1st Author's Name Yuki Takagi  
1st Author's Affiliation SoftBank Corp. (SB)
2nd Author's Name Yoshichika Ohta  
2nd Author's Affiliation SoftBank Corp. (SB)
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Speaker Author-1 
Date Time 2022-11-15 13:50:00 
Presentation Time 25 minutes 
Registration for MW 
Paper # MW2022-113 
Volume (vol) vol.122 
Number (no) no.250 
Page pp.25-30 
#Pages 6 
Date of Issue 2022-11-08 (MW) 

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