A Novel High Effciency Power Amplifier Concept for GSM Handsets

Author

Koller, R. ; Stelzer, A. ; Abt, K.-H. ; Weigel, R.

Author_Institution

Johannes Kepler University of Linz, Institute for Communications and Information Engineering, Altenbergerstr. 69, 4040 Linz, Austria

fYear

2001

fDate

24-26 Sept. 2001

Firstpage

1

Lastpage

4

Abstract

The demand for ever increasing talking times and reduced weight of modern GSM handsets can only be achieved by a significant reduction of the power consumption of the cellular handset, mostly the power the power amplifier (PA). The constant evelope modulation scheme of the GSM system allows the desing of high efficiency power amplifier, such as switching amplifiers. Among them. them, the Class-E amplifier concept is best suited, because it allows about 80% efficiency, while maintaining an excellent output spectrum and reasonable gain. Another advantage is the possibility to an a-priori design an characterization of the amplifier stage by simulation this fact is demonstrated in this paper, by comparing simulation and measurement results of a 45-MHz Class-E amplifier as a 1:20 frequency scaled model of a 900-MHz GSM power amplifier. The excellent match between theory and measurement allows a good prediction of the final Class-E amplifier characteristics by simulation.

Keywords

Circuits; Energy consumption; Frequency; GSM; High power amplifiers; Power amplifiers; Power generation; Power harmonic filters; Telephone sets; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2001. 31st European

Conference_Location

London, England

Type

conf

DOI

10.1109/EUMA.2001.339193

Filename

4140261