| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetron with an improved oscillation efficiency, sufficiently lowering an unnecessary radiation and preventing the deterioration of the oscillation efficiency. SOLUTION: The magnetron is characterized in that, provided that a radius of an outer periphery of a minor-diameter anode strap 49 of the magnetron 41 is Rs1, a radius of an inner periphery of a major-diameter anode strap 51 is Rs2, a radius of an inner periphery inscribed at the tip of anode vanes 47 is Ra, and a radius of a plane part adjacent to each anode vane at the center of a magnetic pole piece is Rp; Ra, Rs1, Rs2 and Rp are set to satisfy formula (1): 1.85Ra≤(Rs1+Rs2)/2≤1.96Ra, and formula (2): Rs1∠Rp∠Rs2. COPYRIGHT: (C)2004,JPO
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