Title :
Large-signal stability and spectrum characterization of a medium power HBT using active load-pull techniques
Author :
Ghannouchi, F.M. ; Beauregard, F. ; Kouki, A.B.
Author_Institution :
Dept. de Genie Electr. et Genie Inf., Ecole Polytech., Montreal, Que., Canada
fDate :
6/1/1994 12:00:00 AM
Abstract :
Large-signal stability and spectrum characterizations of a half-watt HBT at 2 GHz for a class AB bias point are reported. Constant power, constant power-added efficiency, constant current gain contours, and second and third harmonic generation level contours over the whole Smith chart are presented. The characterization setup is an automated high power, multi-harmonic, active load-pull system that is based on six-port techniques and frequency discrimination using a controlled band pass YIG filter.<>
Keywords :
automatic testing; heterojunction bipolar transistors; microwave measurement; power transistors; semiconductor device testing; solid-state microwave devices; stability; 0.5 to 9 GHz; 2 GHz; Smith chart; UHF; active load-pull techniques; automated high power multiharmonic system; characterization setup; class AB bias point; controlled band pass YIG filter; current gain contours; frequency discrimination; harmonic generation level contours; large-signal stability; medium power HBT; power-added efficiency; six-port techniques; spectrum characterization; Frequency conversion; Frequency measurement; Heterojunction bipolar transistors; Impedance measurement; Power amplifiers; Power generation; Power measurement; Reflection; Stability; Tellurium;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
