Title :
A new adaptive double envelope feedback (ADEF) linearizer for mobile radio power amplifiers
Author :
Cardinal, J.-S. ; Ghannouchi, F.M.
Author_Institution :
Microwave Res. Lab., Ecole Polytech. de Montreal, Que., Canada
Abstract :
A new Adaptive Double Envelope Feedback (ADEF) linearizer using a voltage controllable phase shifter and a dynamic gate bias on a MESFET is developed and implemented on a class AB, one Watt amplifier. A two tone test at 1.7 GHz shows in-band intermodulation products of 40 dBc over a 10 dB dynamic range with a total two-tone power added efficiency of 32%.<>
Keywords :
intermodulation; mobile radio systems; power amplifiers; solid-state microwave circuits; ultra-high-frequency amplifiers; 1 W; 1.7 GHz; 32 percent; MESFET; adaptive double envelope feedback; class AB amplifier; dynamic gate bias; dynamic range; in-band intermodulation products; linearizer; mobile radio power amplifiers; power added efficiency; two tone test; voltage controllable phase shifter; Adaptive control; Dynamic range; Linear feedback control systems; MESFETs; Phase shifters; Programmable control; Testing; Voltage control;
Conference_Titel :
Microwave Symposium Digest, 1994., IEEE MTT-S International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-1778-5
DOI :
10.1109/MWSYM.1994.335486
