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Advanced design methods for a high efficiency Doherty power amplifier
Author(s) -
Chen Xiaoqun,
Guo Yuchun,
Shi Xiaowei
Publication year - 2008
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.23375
Subject(s) - amplifier , adjacent channel , intermodulation , doherty amplifier , dbc , power added efficiency , engineering , electrical engineering , linear amplifier , electronic engineering , microwave , power (physics) , rf power amplifier , telecommunications , cmos , physics , quantum mechanics
In this study, a special inverted Doherty topology and uneven power drive methods are proposed to optimize the efficiency and appropriate load modulation. The amplifier is optimized at large power back‐off. The power added efficiency and adjacent channel leakage ratio (ACLR) are 33.1% and −47 dBc, which improve by 3.2% and 5 dB, respectively, and its third‐order intermodulation distortion (IMD3) has 2 .5 dB improvement compared with conventional Doherty power amplifier. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1330–1333, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23375