| 摘要 |
An output power adjusting mechanisms for adjusting output power is provided on a wave guide of a high frequency output section coupled to an output cavity. The output power adjusting mechanisms is located at a position apart away from the output cavity by a distance of 1/8 wavelength or [(1/8 wavelength)xodd number]. The output power adjusting mechanism includes a reflection adjusting part which is provided in the tube wall of the wave guide so as to be displaceable in the inward and outward directions of the output tube. The output power is adjusted by displacing the reflection adjusting part.
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