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Design of Doherty Power Amplifiers for Handset Applications SCIE SCOPUS

Title
Design of Doherty Power Amplifiers for Handset Applications
Authors
Kang, DChoi, JKim, DKim, B
Date Issued
2010-08
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Abstract
In this paper, we analyze the power drive of a Doherty power amplifier (PA), and introduce a technique for proper input dividing without a coupler. For the proper Doherty operation, we place a phase compensation circuit at the input of the carrier amplifier. We also propose an output matching of Doherty PA to reduce the number of matching components, and to match the output impedances to enhance efficiency and linearity in consideration of the uneven input drive. The PA circuit is fabricated using a 2-mu m InGaP/GaAs heterojunction bipolar transistor process and combined for Doherty operation using merged lumped components. For the IEEE 802.16e m-WiMAX signal, which has a 9.54-dB crest factor and 8.75-MHz bandwidth, the PA has an error vector magnitude of 3% and a power-added efficiency of 40.2% at an output power of 26 dBm.
Keywords
Doherty; efficient; handset; heterojunction bipolar transistors (HBTs); linear; monolithic microwave integrated circuit (MMIC); power amplifier (PA); HIGH-EFFICIENCY; HIGHLY EFFICIENT; LINEARITY; OPERATION; SYSTEMS
URI
https://oasis.postech.ac.kr/handle/2014.oak/25627
DOI
10.1109/TMTT.2010.2053074
ISSN
0018-9480
Article Type
Article
Citation
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, vol. 58, no. 8, page. 2134 - 2142, 2010-08
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김범만KIM, BUM MAN
Dept of Electrical Enginrg
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