Multi-cathode magnetron with internal electromagnetic field coupling

A magnetron, comprising:

• a tube body having a plurality of first cavities formed therein, with adjacent first cavities being communicated with each other;
• a plurality of anodes arranged in the first cavity and comprising a cylinder and a plurality of vanes arranged in the cylinder, the vanes extending along a radial direction of the cylinder, outer ends of the vanes being connected with an inner circumferential surface of the cylinder, the vanes being arranged along a circumferential direction of the cylinder at intervals, resonant cavities being formed between the adjacent vanes, the resonant cavities comprising a first resonant cavity and a second resonant cavity, the first resonant cavity alternately arranged along the circumferential direction of the cylinder, the cylinder being provided with a plurality of coupling slots arranged along the circumferential direction of the cylinder at intervals, and the coupling slots running through the cylinder along the radial direction of the cylinder to communicate the first resonant with the first cavity;
• a plurality of cathodes arranged in the cylinder and coaxially arranged with the cylinder, the cathodes and inner ends of the vanes being spaced in the radial direction of the cylinder, and at least part of the cathodes being located inside the plurality of vanes;
• and
• an output slot being defined on the tube body for communicating the first cavity with an outside.