TRI-band CMOS Class-E power amplifier design with phase compensations for polar systems

Chung Min Lai*, Wen An Tsou, Mei Fen Chou, Kuei-Ann Wen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A 0.18μm CMOS fully integrated cascode Class-E power amplifier operating in 2.5GHz/3.5GHz/5.2GHz frequency bands for polar transmitters has been proposed. The tri-band amplification is achieved by adaptation of the common-gate transistor size and the matching networks. The phase distortion from supply modulation of the Class-E is compensated by controlling the common-gate transistor gate voltage and a compensative capacitor. Simulation results show that the maximum power-added efficiency (PAE) of 30.4%, drain efficiency of 34% and output power of 18.8dBm from 2.8V supply can be achieved. The phase distortion can be compensated from 34.4° to 3.1° under supply voltage of 0.5V to 2.8V. A system co-simulation has been established for relative constellation error (RCE) evaluation and it reveals that the RCE can be improved from -23.3dB to -31.4dB in 3.5GHz frequency band.

Original languageEnglish
Title of host publication2010 23rd Canadian Conference on Electrical and Computer Engineering, CCECE 2010
DOIs
StatePublished - 5 Nov 2010
Event2010 23rd Canadian Conference on Electrical and Computer Engineering, CCECE 2010 - Calgary, AB, Canada
Duration: 2 May 20105 May 2010

Publication series

NameCanadian Conference on Electrical and Computer Engineering
ISSN (Print)0840-7789

Conference

Conference2010 23rd Canadian Conference on Electrical and Computer Engineering, CCECE 2010
Country/TerritoryCanada
CityCalgary, AB
Period2/05/105/05/10

Keywords

  • Class-E
  • Polar system
  • Power amplifier
  • Tri-band

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