Patent ID: 7511251
Filing Date: 2009-03-31
Classification: H01J

Abstract:
1. A magnetron, comprising: a yoke having an internal space provided between first and second ends thereof; a first magnet and a second magnet housed in the internal space, and fixedly coupled to the first and second ends, respectively, along a width direction of the yoke; an anode cylinder that generates radio frequency energy provided in a space between the first magnet and the second magnet; a funnel-shaped first pole piece and a funnel-shaped second pole piece disposed at the first and second openings of the anode cylinder, respectively; a cylindrical A-seal provided proximate an upper end of the first pole piece, and configured to intercept external leakage of a fifth harmonic, wherein the cylindrical A-seal includes an inwardly bent end extending from a top end of the A-seal and extending downwardly in an axial direction; and a choke filter provided proximate a lower end of the A-seal along a height direction of the A-seal, and configured to intercept external leakage of a third harmonic.