Effects of Envelope Tracking technique on an L-band power amplifier

Author

Cipriani, Elisa ; Colantonio, Paolo ; Giannini, Franco ; Giofrè, Rocco ; Piazzon, Luca

Author_Institution

Electron. Eng. Dept., Univ. of Roma Tor Vergata, Rome, Italy

fYear

2010

fDate

26-28 April 2010

Firstpage

348

Lastpage

352

Abstract

This contribution presents the application of Envelope Tracking technique on a LDMOS 2^nd harmonic tuned PA, designed to operate at 2.14 GHz. Accounting for the input dynamic signal, optimum drain and gate bias voltages are derived starting from a simplified model of the active device. Experimental results give an increase up to 40% in average efficiency, when bias tracking is applied. The application of Envelope Tracking does not impact on output power and gain performance, in the selected back-off region, implying also a reduction in the spectral regrowth when complex signals are involved.

Keywords

power amplifiers; L-band power amplifier; LDMOS 2nd harmonic tuned PA; back-off region; complex signals; envelope tracking technique; frequency 2.14 GHz; gain performance; gate bias voltage; input dynamic signal; optimum drain; output power; spectral regrowth; Design engineering; High power amplifiers; L-band; OFDM modulation; Peak to average power ratio; Power amplifiers; Power engineering and energy; Power system harmonics; Voltage; Wireless communication; Envelope Tracking; High efficiency; LDMOS;

fLanguage

English

Publisher

ieee

Conference_Titel

MELECON 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference

Conference_Location

Valletta

Print_ISBN

978-1-4244-5793-9

Type

conf

DOI

10.1109/MELCON.2010.5476263

Filename

5476263