Abstract:
A magnetron has an anode cylinder, a plurality of vanes extending radially inwardly from the anode cylinder, a cathode filament extending along a center axis of the anode cylinder, an output section including an antenna coupled to one of the vanes, and a magnetic circuit section for supplying a magnetic field into the anode cylinder, whereby the magnetron oscillates at a fundamental frequency in a range from 400 MHz to 600 MHz.
Abstract:
A cathode for a secondary emission structure comprised of a superconductive material is described. In one embodiment the cathode comprises a layer of a superconductive material such as yttrium barium cupric oxide, or rare earth substituted neodymium cupric oxides. The layer may be bonded to a metal electrode or preferably the cathode consist of a superconductive or conductive oxide. The use of a superconductive material provides a cathode having suitable secondary emission characteristics and, furthermore, which being conductive at room temperatures, as well as, temperatures of operation of the cathode, obviating the need for a use of a very thin film of a secondary emission material.
Abstract:
A magnetron has an anode cylinder, a plurality of vanes extending radially inwardly from the anode cylinder, a cathode filament extending along a center axis of the anode cylinder, an output section including an antenna coupled to one of the vanes, and a magnetic circuit section for supplying a magnetic field into the anode cylinder, whereby the magnetron oscillates at a fundamental frequency in a range from 400 MHz to 600 MHz.
Abstract:
PURPOSE: To provide a magnetron having an oscillation frequency of 400 to 600 MHz and a processing device using the magnetron. CONSTITUTION: The magnetron is provided with a negative electrode part including a thermion emission source, a positive electrode part including a plurality of positive electrode vanes, magnetic circuit part including magnet-generating means and a output part including an antenna, and each electrode measures as follows. F (outer diameter of a negative electrode filament)=5.0 to 6.0 mm G (inner diameter of a vane end)=10 to 13 mm D1 (inner diameter of positive electrode cylinder part)=110 to 130 mm F/G £(outer diameter of a negative electrode filament)/(inner diameter of a vane end)|=0.38 to 0.6 L1 (total length of a positive electrode vane)=50 to 56 mm H1 (height of a positive electrode vane)=13 to 15 mm H2 (height of a notched part)=0 to 3 mm T1 (thickness of a positive electrode vane)=7.5 to 8.5 mm.