Patent ID: 7687749
Filing Date: 2010-03-30
Classification: H01J,H05B

Abstract:
1. A magnetron for a microwave oven, comprising: a filter case; and a pair of choke coils, provided in the filter case, each of the choke coils in which an air-core type inductance and a core type inductance including a high frequency absorbing member in a winding are connected in series, one of ends of each of the choke coils being connected to each of a pair of cathode input conductors and the other end of each of the choke coils being connected to each of a pair of terminals of a capacitor; wherein a height of an internal surface of the filter case is set to be 35 to 45 mm; an outside diameter of the air-core type inductance is set to be 5.5 to 7.5 mm and a sectional area of the high frequency absorbing member of the core type inductance is set to be 5 to 16 mm an electrostatic capacity between a terminal of the capacitor and the filter case is maintained to be 500 to 700 pF.