A polar linearisation system for RF power amplifiers

Author

Asbeck, Per ; Fallesen, Caarsten

Author_Institution

Nokia Denmark A/S, Denmark

Volume

1

fYear

2000

fDate

2000

Firstpage

478

Abstract

An new transmitter architecture for polar linearization of RF power amplifiers is presented. The architecture is adapted to digital transmitters which makes it possible to move some of the analog signal processing to the digital domain. An improvement of the varying loop-gain problem in feed back linearisation systems, that is easily incorporated in the new architecture is presented. This improvement increases the stability margin and reduces the variations of the bandwidth which leads to higher linearity of the system. Simulations documenting the improvements and showing important design constraints are presented

Keywords

MMIC power amplifiers; UHF integrated circuits; UHF power amplifiers; cellular radio; digital signal processing chips; linearisation techniques; radio transmitters; RF power amplifiers; analog signal processing; design constraints; linearity; polar linearisation system; stability margin; transmitter architecture; varying loop-gain problem; Bandwidth; Digital signal processing; Feeds; Linearity; Power amplifiers; RF signals; Radio frequency; Radiofrequency amplifiers; Stability; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics, Circuits and Systems, 2000. ICECS 2000. The 7th IEEE International Conference on

Conference_Location

Jounieh

Print_ISBN

0-7803-6542-9

Type

conf

DOI

10.1109/ICECS.2000.911583

Filename

911583