Importance of the absolute electrical length of the outphasing combiner in LINC amplification systems

Author

Issaoun, Ammar ; Ghannouchi, Fadhel M. ; Kouki, Ammar B.

Author_Institution

Ecole Polytechnique de Montreal, Que., Canada

Volume

1

fYear

2005

fDate

4-7 Dec. 2005

Abstract

This paper reports an experiment based study of a LINC transmitter system consisting of two saturated class B LDMOS power amplifiers and three different outphasing power combining structures. The measurement results showed that the absolute electrical length of the two arms of the outphasing combiner is a critical parameter in designing a LINC system. A peak power, efficiency of 61% was measured and an average of 10% improvement in system efficiency was obtained at back off region when using the adequate Chireix-combiner.

Keywords

MMIC power amplifiers; MOS analogue integrated circuits; UHF power amplifiers; amplification; transmitters; Chireix-combiner; LINC amplification systems; LINC transmitter system; absolute electrical length; class B LDMOS power amplifiers; linear amplification; outphasing combiner; outphasing power combining structures; Arm; High power amplifiers; Linearity; Phase modulation; Power amplifiers; Power generation; Radio frequency; Radiofrequency amplifiers; Signal resolution; Topology;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings

Print_ISBN

0-7803-9433-X

Type

conf

DOI

10.1109/APMC.2005.1606229

Filename

1606229