Title :
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
Abstract :
This contribution presents the application of Envelope Tracking technique on a LDMOS 2nd 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;
Conference_Titel :
MELECON 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference
Conference_Location :
Valletta
Print_ISBN :
978-1-4244-5793-9
DOI :
10.1109/MELCON.2010.5476263
