| 摘要 |
PROBLEM TO BE SOLVED: To efficiently prevent the receiving state of radio waves from getting adverse or image from being distorted and hard to watch due to snowing even in a snowy counting by making a paraboloidal antenna composed of a main body of paraboloidal antenna and a snow melting device provided with a sheet- shaped laminate heater. SOLUTION: A snow melting device 12 is composed of five laminate heaters 13, for example, on the back of a main body 7 of paraboloidal antenna and a current feeder circuit 16 connected through a distributor 14 and a sensor switch 15 to a converter 11 for supplying power to this laminate heater 13 when the temperature of atmosphere gets lower than the temperature of snowing. Concerning such a paraboloidal antenna, at the temperature of snowing in the snowy country, the sensor switch 15 is turned on, the current is supplied from the converter 11 and flow from the distributor 14 to the laminate heater 13 and the laminate heater 13 is heated. The heat of this laminate heater 13 is conducted to the main body 7 of the antenna and removes snow falling it on. |
