Distortion correction of LDMOS power amplifiers using hybrid RF second harmonic injection/digital predistortion linearization

Author

Koulouzis, H. ; Budimir, D.

Author_Institution

Dept. of Electron. Syst., Westminster Univ., London

fYear

2006

fDate

16-19 May 2006

Firstpage

177

Lastpage

179

Abstract

An LDMOS RF power amplifier for RF multichannel wireless systems with improved IMD performance characteristics is presented. The application of two combined linearization methods is being tested with the help of circuit simulation software ADS. The injection of the fundamental signal´s second harmonic in the RF amplifier, as well as a digital predistortion technique, is combined in order to achieve IMD improvement. By proper selection of phase and amplitude of the injected second harmonic signal, it is possible to reduce IMD products that have already been reduced by the well established method of digital predistortion

Keywords

MOS analogue integrated circuits; circuit simulation; harmonic distortion; intermodulation distortion; linearisation techniques; power amplifiers; radiofrequency amplifiers; radiofrequency integrated circuits; wireless channels; LDMOS power amplifiers; RF multichannel wireless systems; circuit simulation software ADS; digital predistortion linearization; digital predistortion technique; distortion correction; hybrid RF second harmonic injection; injected second harmonic signal; Application software; Circuit simulation; Circuit testing; Harmonic distortion; Power amplifiers; Power system harmonics; Predistortion; Radio frequency; Radiofrequency amplifiers; Software testing; Intermodulation distortion; LDMOS; RF power amplifiers; digital predistortion;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrotechnical Conference, 2006. MELECON 2006. IEEE Mediterranean

Conference_Location

Malaga

Print_ISBN

1-4244-0087-2

Type

conf

DOI

10.1109/MELCON.2006.1653065

Filename

1653065