Title :
Closed-loop stability analysis of microwave amplifiers
Author :
Jugo, J. ; Portilla, J. ; Anakabe, A. ; Suárez, A. ; Collantes, J.M.
Author_Institution :
Dept. of Electr. & Electron., Univ. of the Basque Country, Bilbao, Spain
fDate :
2/15/2001 12:00:00 AM
Abstract :
A stability analysis technique of microwave amplifiers, valid for large- or small-signal regimes, is presented. The technique calculates the system poles and zeroes from a closed-loop frequency response of the circuit linearised around its steady state. The method has been applied to an S-band monolithic amplifier, detecting spurious oscillations for certain specific bias conditions and input power levels, in good agreement with measurements
Keywords :
MMIC amplifiers; circuit stability; closed loop systems; frequency response; microwave amplifiers; poles and zeros; S-band monolithic amplifier; closed-loop stability analysis; frequency response; large-signal response; linearisation; microwave amplifier; poles and zeroes; small-signal response; spurious oscillations;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20010170
