A 60% PAE WCDMA Handset Transmitter Amplifier

Author

Warr, Paul A. ; Morris, Kevin A. ; Watkins, Gavin T. ; Horseman, Tony R. ; Takasuka, Kaoru ; Ueda, Yukihiro ; Kobayashi, Yasushi ; Miya, Shinji

Author_Institution

Centre for Commun. Res., Univ. of Bristol, Bristol, UK

Volume

57

Issue

10

fYear

2009

Firstpage

2368

Lastpage

2377

Abstract

This paper reports the design of a class-E envelope elimination and restoration (EER) based amplifier for a wideband code division multiple access handset application that attains 60% power-added efficiency at peak power output. Emphasis is placed on the envelope modulator that employs a novel split-frequency approach in order to attain an efficiency of 80% for this part of the system. In contrast to standard EER systems, the carrier is not amplitude limited, but rather predistorted to maintain both linearity and power efficiency. Performance in terms of efficiency, spectral output, and error vector magnitude is reported.

Keywords

code division multiple access; power amplifiers; radio transmitters; PAE WCDMA handset transmitter amplifier; class-E envelope elimination-restoration amplifier; envelope modulator; power-added efficiency; split-frequency approach; standard EER systems; wideband code division multiple access handset application; Amplifier distortion; envelope elimination and restoration (EER); mobile communications;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2009.2029021

Filename

5210127