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Linearity Improvement of Class E Amplifier Using Digital Predistortion  

Park, Chan-Hyuck (Dept. of Electronics Eng., University of Incheon)
Koo, Kyung-Heon (Dept. of Electronics Eng., University of Incheon)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.44, no.3, 2007 , pp. 92-97 More about this Journal
Abstract
Switching mode amplifiers have been studied widely for use at microwave frequency range, and the class E amplifier which is a type of switching mode amplifier offers very high efficiency approaching 100%. In this paper, 2.4GHz microwave class E amplifier with 66% power added efficiency (PAE) and 17.6dBm output has been linearized for use at wireless LAN transmitter, and digital predistortion technique with look up table is applied. With -3dBm input power of wireless LAN, measured output spectrum can meet the required IEEE 802.11g standard spectrum mask, and the digital predistortion output spectrum has been improved by 5dB of ACPR at 20MHz offset from center frequency.
Keywords
Predistortion; class E amplifier; switching mode; high efficiency;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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