Magnetron device having magnetic means for generating a uniform interaction field

摘要

A magnetron for oscillating ultrashort waves by uniformly applying a magnetic field to electrons, which comprises a cylindrical electrode assembly consisting of concentrically arranged cathode and anode electrodes; a magnetizing device formed of a pair of mutually facing permanent magnets prepared from rare earth so as to apply a magnetic field at right angles to electrons emitted from the cathode electrode to the anode electrode; and wherein the mutually facing magnetic pole surfaces of the paired permanent magnets are so depressed as to present a surface shaped in the form of a revolving ellipsis in order to apply a uniform magnetic field to electrons for control of their orbit, thereby producing from an outlet circuit oscillated electric waves which have resonated in the resonance cavity section of the anode electrode.