Efficiency boosting of multilevel LINC transmitter

Author

Aref, Ahmed F. ; Askar, AbdelRahman ; Werner, Sergej ; Pozdniakov, Dimitri ; Kalim, Danish ; Negra, Renato

Author_Institution

Mixed-Signal CMOS Circuits, RWTH Aachen Univ., Aachen, Germany

fYear

2011

Firstpage

127

Lastpage

130

Abstract

A multilevel output outphasing transmitter has been developed to boost efficiency considerably over regular LINC transmitter. The system consists of four identical class-E power amplifiers (PAs) in hybrid design operating at 3.3 GHz and delivering a peak output power of 40.5 dBm. By controlling the supply voltage of the four PA units a fully symmetrical multilevel outphasing behaviour can be achieved with a power added efficiency (PAE) enhancement over a range of more than 25 dB of output power back-off. By comparing system measurement results with conventional outphasing transmitter a peak PAE enhancement of 33 % points and a maximum DC power saving of 21 Watts were achieved.

Keywords

microwave power amplifiers; radio transmitters; class-E power amplifiers; efficiency boosting; frequency 3.3 GHz; hybrid design; linear amplification; multilevel LINC transmitter; multilevel output outphasing transmitter; nonlinear components; power added efficiency; Dynamic range; Gain; Power combiners; Power generation; Power measurement; Switches; Transmitters; LINC; Multilevel LINC; Outphasing transmitter; Power Added Efficiency (PAE);

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2011 Asia-Pacific

Conference_Location

Melbourne, VIC

Print_ISBN

978-1-4577-2034-5

Type

conf

Filename

6173702