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A high‐efficiency power amplifier using multilevel digital pulse modulation
Author(s) -
Kim Hyunjin,
Jeon Youngsang,
Lee Jaejun,
Lee Sungho,
Nam Sangwook
Publication year - 2009
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.24494
Subject(s) - baseband , amplifier , pulse width modulation , transmitter , electronic engineering , predistortion , radio transmitter design , microwave , engineering , modulation (music) , electrical engineering , linearity , signal (programming language) , computer science , telecommunications , physics , acoustics , channel (broadcasting) , voltage , cmos , programming language
This article introduces a new architecture for a high‐efficiency linear transmitter using a pulse modulated envelope signal. The transmitter employs multilevel PWM to represent the baseband signal. By using multilevel PWM, the efficiency of the power amplifier can be improved compared with that using the conventional PWM. To demonstrate the validity of the proposed architecture, a transmitter using three‐level PWM is implemented and tested with the CDMA IS‐95A signal. The measured PAE, including isolator and filter loss, is 37.6% at 21.6 dBm average output power and the linearity requirements are satisfied. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1921–1924, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24494