Paper Info
Title
An Hpsk/Ofdm 64-Qam Dual-Mode Doherty Power Amplifier Module For Mobile Terminals
Abstract
This paper presents a miniaturized dual-mode Doherty PA module applicable for an HPSK signal and an OFDM 64-QAM signal. Dual-mode operation with identical hardware is realized by introducing a bias switching technique, which changes bias conditions of amplifiers according to transmission signals, and employing dual-mode matching circuits, which are designed based on the results of load-pull measurements using an HPSK signal and an OFDM 64-QAM signal. The Doherty PA module consists of a Doherty stage and a gain stage. Two GaAs-HBTs for a Doherty stage and one GaAs-HBT for a gain stage are integrated onto a I mm-square single GaAs-MMIC. In the HPSK mode, maximum output power of 26.7 dBm, power added efficiency (PAE) of 41%, and power gain of 27 dB are obtained in the condition that adjacent channel leakage power ratio (ACLR) is under -38 dBc. In the OFDM 64-QAM mode, maximum output power of 21.0 dBm, PAE of 27%, and power gain of 28 dB, are obtained under EVM < 3.0%. This is the first multi-mode Doherty PA module suitable for multi peak to average power ratio (PAPR) signals.
Year
DOI
Venue
2007
10.1093/ietele/e90-c.9.1678
IEICE TRANSACTIONS ON ELECTRONICS
Keywords
Field
DocType
Doherty amplifier, PA module, HPSK, OFDM 64-QAM, multimode, mobile terminal, GaAs MMIC
Power gain,Doherty amplifier,Quadrature amplitude modulation,Adjacent channel,Electronic engineering,Gain stage,Power-added efficiency,Engineering,Electrical engineering,Orthogonal frequency-division multiplexing,Amplifier
Journal
Volume
Issue
ISSN
E90C
9
0916-8524
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Takayuki Kato111.39
Keiichi Yamaguchi201.35
Yasuhiko Kuriyama3102.41
Hiroshi Yoshida4236.54