Patent ID: 9697977
Date: 2017-07-04
CPC Classifications: H01J,H05B

Claim:
1. A magnetron comprising: a yoke; an anode unit comprising an anode cylinder placed in the yoke and having a working space, a plurality of vanes radially arranged about an axis of the working space, and a first pole piece and a second pole piece respectively installed at both sides of the anode cylinder; a cathode unit placed in the working space and having a filament spaced apart from the plurality of vanes; and an output unit having an antenna lead connected to a vane among the plurality of vanes to radiate high-frequency microwaves generated by the anode unit and the cathode unit to the outside of the yoke, wherein the first pole piece of the anode unit comprises a first flat portion, a slope formed at an inner side of the first flat portion, a second flat portion formed at an inner side of the slope and having a diameter from 9.5 mm to 10.5 mm, a first hole formed in a center of the second flat portion at a position corresponding to the working space and having a diameter from 8 mm to 8.2 mm, and a second hole formed in the slope for penetration of the antenna lead, wherein the second pole piece of the anode unit comprises a first flat portion, a slope formed at an inner side of the first flat portion, a second flat portion formed at an inner side of the slope and having a diameter different from the diameter of the second flat portion of the first pole piece, and the first hole formed in the center of the second flat portion at the position corresponding to the working space and having a diameter different from the diameter of the first hole of the first pole piece.