Title :
Efficiency and linearity enhancements with envelope shaping control in dual-band envelope tracking GaAs PA
Author :
Cidronali, Alessandro ; Manes, Gianfranco ; Giovannelli, Niccolò ; Vlasits, Tamas ; Hernaman, Robin
Author_Institution :
Dept. Electron. & Telecomm, Univ. of Florence, Florence, Italy
Abstract :
In this paper we present the efficiency and linearity trade-off of a dual band power amplifier (PA) for envelope tracking (ET) operation. The paper discusses the impact of envelope shaping i.e. the mapping of the drain modulated waveform to the RF output power, on system linearity and efficiency performance, for a given signal statistic. The technique was applied to a dual-band ET PA designed around a GaAs HEMT at 940 and 1940 MHz. Analytical treatment of the design technique along with characterization at device and system level are also presented in the paper.
Keywords :
gallium arsenide; high electron mobility transistors; power amplifiers; semiconductor device models; GaAs; GaAs HEMT; GaAs PA; drain modulated waveform; dual band power amplifier; dual-band ET PA; dual-band envelope tracking; efficiency enhancement; envelope shaping control; frequency 1940 MHz; frequency 940 MHz; linearity enhancement; signal statistic; Dual band; Gain; Gallium arsenide; Impedance; Linearity; Multiaccess communication; Peak to average power ratio; Envelope Tracking PA; GaAs; dual-band PA;
Conference_Titel :
Microwave Integrated Circuits Conference (EuMIC), 2011 European
Conference_Location :
Manchester
Print_ISBN :
978-1-61284-236-3
