Envelope tracking power amplifier with pre-distortion linearization for WLAN 802.11g

This paper presents a power amplifier based on envelope tracking (ET) with application to the WLAN 802.11g system. Baseband pre-distortion is implemented to improve the linearity. A high-efficiency wide-bandwidth envelope amplifier and a GaAs MESFET class AB RFPA are designed and implemented for the...

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Bibliographic Details
Published in2004 IEEE MTT-S International Microwave Symposium Vol. 3; pp. 1543 - 1546 Vol.3
Main Authors Feipeng Wang, Ojo, A., Kimball, D., Asbeck, P., Larson, L.
Format Conference Proceeding
LanguageEnglish
Published Piscataway NJ IEEE 2004
Subjects
Amplifiers
Applied sciences
Baseband
Circuit properties
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Linearity
MESFETs
OFDM
Power amplifiers
Power generation
Radio frequency
Radiofrequency amplifiers
RF signals
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Transistors
Wireless LAN
Performance evaluation
Wireless LAN
Target tracking
Output power
Wireless telecommunication
Base band
Implementation
Preamplifier
Class AB
Linearity
Orthogonal frequency division multiplexing
Power amplifier
Metal semiconductor field effect transistor
Linearization
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Summary:This paper presents a power amplifier based on envelope tracking (ET) with application to the WLAN 802.11g system. Baseband pre-distortion is implemented to improve the linearity. A high-efficiency wide-bandwidth envelope amplifier and a GaAs MESFET class AB RFPA are designed and implemented for the system. An overall system drain efficiency of 30% is obtained for an OFDM output power of 20 dBm at 2.4GHz.
ISBN:0780383311
9780780383319
ISSN:0149-645X
DOI:10.1109/MWSYM.2004.1338872