Title :
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
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;
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
DOI :
10.1109/SBMOMO.1995.509647
