| 摘要 |
PURPOSE:To prevent the characteristic deterioration of a reflector antenna which is due to the snow, by using a driving device to give vibrations only to the reflector. CONSTITUTION:When it begins to snow, the vibrations having satisfactorily small amplitude with the using frequency are applied only to a reflector 10 by a vibration driving device 13. As a result, the oscillating waves are always produced on the surface of the reflector 10 to prevent attachment of the snow. |
