Patent ID: 6064154
Filing Date: 2000-05-16
Classification: H01J

Abstract:
A magnetron oscillator comprising:a magnetron tube comprising an anode having a plurality of inwardly protruding vanes and a central cathode, and wherein a plurality of resonant cavities are formed that are bounded by gaps between ends of adjacent vanes, walls of the inwardly protruding vanes and an adjacent portion of the wall of the anode;means for supplying a bias voltage between the anode and central cathode to create a DC electric field therebetween;means for applying a magnetic field along an axial direction of the magnetron tube; andone or more gas-filled subcells disposed within each of the plurality of resonant cavities; anda plasma formed within one or more selected subcells of each cavity which is controllable to alter the electromagnetic field within each cavity to tune the oscillating frequency of the magnetron oscillator.