| 摘要 |
PURPOSE:To set a directional antenna rotatably and to shorten the time to set the antenna in a desired direction by using a rotary transformer to transmit signals between the antenna and a transmitting/receiving device. CONSTITUTION:A directional antenna is attached to the tip of a pole 5, and a revolving mechanism part 6 containing a motor is provided at the lower edge of the pole 5. A rotor core holding stage 8 is set above the mechanism 6, and a rotor core 7 wound by a winding 13 is attached to the stage 8. Then the winding 13 is connected to a cable 9 connected to the directional antenna. In addition, a startor core 10 is attached to a stator core holding stage 11 and set opposite to the core 7. A winding 14 is wound around the core 10 and connected to a cable 12 connected to a transmitting/receiving device. Then the core 7 is fixed directly or indirectly to the pole 5; while the core 10 is attached rotatably to the pole 5 by means of a bearing, etc. Thus a rotary transformer is obtained. |
