Patent ID: 6437511
Filing Date: 2002-08-20
Classification: H01J

Abstract:
A magnetron comprising:a cathode disposed at a center of an interior of the magnetron; an anode surrounding said cathode to define an interaction space; a plurality of vanes surrounding said cathode and extending from said anode; an antenna feeder electrically connected to said plurality of vanes; an anode seal, for serving as a magnetic circuit path and as a body support; a first choke comprising: a cylindrical body; a flange part extending from a top of said cylindrical body toward said anode seal; and a supporting means extending from said flange part in parallel to said cylindrical body, said first choke being fixed within said anode seal to be resonant with the wave length to be suppressed of high frequency energy generated by said magnetron, wherein the cylindrical body, the flange part, and the supporting means are integral; and a second choke comprising: a cylindrical body; and a flange part extending from a top of said cylindrical body of said second choke toward said anode seal, said second choke being fixed within said anode seal to be resonant with the wave length to be suppressed, and said first and second chokes maintaining a proper gap therebetween due to said supporting means of said first choke, and wherein said cylindrical body of said first choke has a height smaller than that of said supporting means, and said supporting means has a plurality of supporting elements.