Title:
マグネトロン
Document Type and Number:
Japanese Patent JP2005521201
Kind Code:
A
Abstract:
A magnetron comprises a cathode 5, an anode 2 having at least one vane 3, which defines a plurality of cavities. A dielectric resonator 7 is located between the vane(s) 3 and magnetic pole-piece 6a, such that it is in communication with said vane(s). The di-electric resonator 7 comprises a portion 8 of dielectric material, preferably a ceramic such as alumina, and a portion 9 of lossy material such as a carbon-loaded ceramic. A further conductive portion (15, figure 3) may be interposed between the two sections 8 and 9 of the resonator 7. In use the dielectric resonator 7 at least partially absorbs spurious radiation generated in a predetermined mode of operation of the magnetron, preferably the pi-1 mode, which if transmitted may interfere with other electronic devices.
Inventors:
Bloody Michael Barry Clive
Application Number:
JP2003577294A
Publication Date:
July 14, 2005
Filing Date:
March 17, 2003
Export Citation:
Assignee:
E2V Technologies (UK) Limited
International Classes:
H01J23/20; H01J23/54; H01J25/50; H03B9/10; (IPC1-7): H01J23/20; H03B9/10
Attorney, Agent or Firm:
Sadao Kumakura
Fumiaki Otsuka
Toshio Imajo
Takaki Nishijima
Fumiaki Otsuka
Toshio Imajo
Takaki Nishijima