| 摘要 |
The filament of magnetron including a plurality of vanes forming a resonance circuit which determines the operating frequency, the veins being arranged in a radial manner, filament forming a specific electric field shape in a portion in which the veins and the filament are opposite to each other, and emitting hot electrons, and a magnetic pole applying magnetic field so as that the hot electrons emitted from the filament are in cycloid motion is disclosed in which the portion in which the filament and veins are opposite to each other is formed in line-shape, to form the electric field uniformly, thereby reducing the line noise due to the charge density difference.
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