The present invention relates to an anode 1 of a magnetron and particularly to a vane 2 mounted on an inner surface of an anode 1 for dividing the anode 1 into n pieces and a vane 2, To a constellation ring (4) connected by a circuit. The combination structure of the vane 2 and the strip ring of the magnetron according to the present invention is composed of a constellation ring composed of an inner rectilinear section 41 and an outer rectilinear section 42 and a shaded section 43 connecting them, star type strap rings are vertically spaced apart from each other by a predetermined distance on the upper ends of the vanes 2 attached to the inner surface of the anode 1 to form inner and outer straight lines 41, (42) are arranged so as to be close to the end of any vane (2) alternately. When the constellation ring 4 according to the present invention is used, it is always attached at a constant mounting interval (a) to the end of the vane 2, and the same vane 2 is attached to both ends of the vane 2 The electric field generated at the end of the vane 2 can be uniformly formed since the vane 2 and the constellation ring 4 can be coupled to each other so that the electron loss in the action space formed inside the vane 2 can be distorted A phenomenon or the like is not caused.
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