Title :
Analysis of power recycling techniques for RF and microwave outphasing power amplifiers
Author :
Zhang, Xuejun ; Larson, Lawrence E. ; Asbeck, Peter M. ; Langridge, Robert A.
Author_Institution :
Center for Wireless Commun., California Univ., San Diego, La Jolla, CA, USA
fDate :
5/1/2002 12:00:00 AM
Abstract :
A power recycling technique has been analyzed for efficiency-enhanced radio-frequency (RF) and microwave outphasing power amplifiers for mobile wireless communications. By use of a simple power recycling network, a considerable portion of the wasted power can be recovered back to the power supply, and the enhancement of the overall power efficiency can be achieved without sacrificing the high-linearity performance of the amplifier system. An analysis and calculations have been conducted to optimize the recycling network for maximum power efficiency. The results predict a significant improvement on the overall power efficiency of the amplifier system for various modulations.
Keywords :
UHF power amplifiers; microwave power amplifiers; mobile communication; phase shift keying; power consumption; quadrature amplitude modulation; MPSK; MQAM; RF outphasing power amplifiers; high-linearity performance; linear amplification with nonlinear components; linear modulations; microwave outphasing power amplifiers; mobile wireless communications; overall power efficiency enhancement; power recycling technique; wasted power recovery; High power amplifiers; Linearity; Microwave amplifiers; Microwave theory and techniques; Power amplifiers; Power supplies; Radio frequency; Radiofrequency amplifiers; Recycling; Wireless communication;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
DOI :
10.1109/TCSII.2002.801411
