Title :
Stability envelope-new tool for generalised stability analysis
Author :
Narhi, T. ; Valtonen, M.
Author_Institution :
Eur. Space Agency, Noordwijk, Netherlands
Abstract :
A new Nyquist-type method for stability analysis is presented. The envelope of the mapping from source and load impedance planes with "normalised determinant function" is determined for all passive terminations. The circuit is unconditionally stable if the origin is not encircled or included within the envelope. A single plot reveals instabilities, caused either by internal poles of the circuit or by arbitrary terminating impedances.
Keywords :
Nyquist stability; UHF circuits; circuit stability; matrix algebra; microwave circuits; network analysis; Nyquist-type method; SHF; UHF; generalised stability analysis; instabilities; internal poles; load impedance plane; normalised determinant function; passive terminations; source impedance plane; stability envelope; terminating impedances; Admittance; Circuit simulation; Circuit stability; Equations; Frequency; Microwave Theory and Techniques Society; Reflection; Ring oscillators; Stability analysis; Writing;
Conference_Titel :
Microwave Symposium Digest, 1997., IEEE MTT-S International
Conference_Location :
Denver, CO, USA
Print_ISBN :
0-7803-3814-6
DOI :
10.1109/MWSYM.1997.602869
