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Wideband Envelope Elimination and Restoration Power Amplifier with High Efficiency Wideband Envelope Amplifier for WLAN
 

Summary: Wideband Envelope Elimination and Restoration Power Amplifier
with High Efficiency Wideband Envelope Amplifier for WLAN
802.11g Applications
Feipeng Wang, Donald Kimball, Jeremy Popp*, Annie Yang*, Donald Y. C. Lie, Peter Asbeck and
Lawrence Larson
Dept. of Electrical and Computer Engineering, University of California at San Diego, La Jolla, CA
* Space and Naval Warfare System Center (SPAWAR), San Diego, CA
Abstract -- This paper presents the design of a silicon bipolar
Class-E wideband envelope elimination and restoration
(WBEER) power amplifier with a wideband high efficiency
envelope amplifier. The envelope amplifier is composed of a
linear op-amp stage and a switch buck converter, which
achieves high fidelity and high efficiency amplification of
wideband high peak to average (PAR) envelope signals.
Experimental results show that the envelope amplifier has a
bandwidth of 20MHz and 50~60% efficiency. An overall
EER power added efficiency (PAE) of 28% at an output
power of 19 dBm was achieved for a WLAN OFDM signal at
2.4GHz.
Index Terms -- Envelope elimination and restoration,

  

Source: Asbeck, Peter M. - Department of Electrical and Computer Engineering, University of California at San Diego

 

Collections: Engineering