An adaptive linearizer using feedback and dynamic biasing techniques for SSPAs

Author

Ghannouchi, Fadhel M. ; Cardinal, J.-S. ; Hajji, R.

Author_Institution

Dept. of Electr. & Comput. Eng., Ecole Polytech. de Montreal, Que., Canada

Volume

1

fYear

1995

fDate

24-27 Jul 1995

Firstpage

369

Abstract

A novel adaptive envelope feedback linearizer using a dynamic gate bias for gain stabilization has been developed and validated using PIP MDS software. A two-tone test at around 14 GHz for a 25 dBm solid state power amplifier (SSPA) shows an average in-band intermodulation product below -35 dBc up to saturation. This linearity enhancement is accompanied by only a 10% increase (in average) in the power-added efficiency from 35% to 45%

Keywords

circuit analysis computing; circuit feedback; circuit stability; intermodulation; linearisation techniques; microwave power amplifiers; power amplifiers; 14 GHz; 45 percent; Ku-band; MESFET power amplifier; PIP MDS software; SHF; SSPA; adaptive linearizer; computer simulation results; dynamic biasing techniques; dynamic gate bias; feedback; gain stabilization; inband intermodulation product; linearity enhancement; power-added efficiency; saturation; solid state power amplifier; two-tone test; Chirp modulation; Degradation; Feedback circuits; Feedback loop; MESFET circuits; Negative feedback; Output feedback; Power amplifiers; Power generation; Transceivers;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Optoelectronics Conference, 1995. Proceedings., 1995 SBMO/IEEE MTT-S International

Conference_Location

Rio de Janeiro

Print_ISBN

0-7803-2674-1

Type

conf

DOI

10.1109/SBMOMO.1995.509647

Filename

509647