MAGNETRON AND METHOD FOR MANUFACTURING THE SAME

PROBLEM TO BE SOLVED: To narrow down a fundamental wave occupied band of magnetron without increasing costs.SOLUTION: In magnetron including: an anode cylinder 1 which cylindrically extends along the center axis; a plurality of plate-like first vanes 51 which extend from the inner surface of the anode cylinder 1 toward the center axis; plate-like second vanes 52 which extend from the inner surface of the anode cylinder 1 toward the center axis and provided, respectively at positions to be sandwiched by two first vanes 51; a first strap ring 61 which short-circuits the first vanes 51 on the output side; and a second strap ring 62 which short-circuits the second vanes 52 on the output side, the vanes 51, 52 are manufactured by pressing a plate having a first surface 71 and a second surface 72 from the side of the first surface 71, the adjacent vanes 51, 52 are arranged so that the first surfaces 71 or the second surfaces 72 face each other, and an angle to be formed by the vanes 51, 52 in which the first surfaces 71 face each other is made to be smaller than an angle to be formed by the vanes 51, 52 in which the second surfaces 72 face each other.