Symmetrical magnetron with output means on center axis

摘要

A magnetron suited for use in microwave ovens includes a cylindrical anode surrounding interaction spaces for producing a microwave and a cylindrical portion extending from the cylindrical anode. A partition disk-like plate having a plurality of coupling openings is disposed in the cylindrical extension thereby to define a coaxial type cavity resonator. The coupling openings of the partition plate are located in the vicinity of vanes provided in the interaction spaces for producing the microwave and positioned in alignment with every other one of the vanes. An inner conductor of the coaxial type cavity resonator has an end connected to the partition plate and the other end extending to the end of the cylindrical anode. The center axis of the cavity resonator substantially coincides with that of the cylindrical anode. The end of the extension of the cylindrical anode is closed by a conductor plate through an insulator member disposed between the conductive plate and the other end portion of the inner conductor. An output antenna connected to the inner conductor at the side of the closed end projects outwardly in coaxial alignment with the cylindrical anode.