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

Volume

49

Issue

5

fYear

2002

fDate

5/1/2002 12:00:00 AM

Firstpage

312

Lastpage

320

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;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/TCSII.2002.801411

Filename

1025150