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Analysis of power recycling techniques for RF and microwave outphasing power amplifiers

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4 Author(s)
Xuejun Zhang ; Center for Wireless Commun., California Univ., San Diego, La Jolla, CA, USA ; Larson, L.E. ; Asbeck, P.M. ; Langridge, R.A.

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.

Published in:

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on  (Volume:49 ,  Issue: 5 )

Date of Publication:

May 2002

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