F.E.T. oscillation frequency domain solution

A new approach is used to determine when the necessary condition for oscillation, Re (Za)<0, holds in a microwave oscillator. Here Za is the Schottky GaAs f.e.t. active network impedance. This analysis has been used to develop a computer program that calculates the frequencies at which the above condition holds. The computer program also provides inband impedances and reflection coefficients and has been utilised to study Ku-band y.i.g.-tuned oscillators. Bandwidth and initial frequency of oscillation curves as functions of f.e.t.-model lumped elements are generated from the computer program.