| 摘要 |
PURPOSE:To simplify the construction and to make the directivity adjustment of an antenna easy, by supporting the antenna at four points and constituting a support as a struts arranged in triangle shape. CONSTITUTION:Each one end of struts 15-20 of variable length is freely rotatably fitted to movable supporting metallic fixtures 21-24 fixed to a base at first. Another end of struts 16, 17, 19 and 15, 18, 20 is respectively fitted to movable supporting metallic fixtures 11 and 12, freely movably. A supporting frame 10 is fixed to the metallic fixtures 11, 12. A fitting frame is fitted to the frame 10 via a strut 6 and a supporting rod 61. One end of struts 13, 14 is fitted to a metallic fixture 22 and another end is to two points of the frame 10 freely rotatably, and these two points are fitted to a fitting ring 5 via movable supporting metallic fixtures 8, 9. Next, an antenna is fitted to a ring 5. In the adjustment of the antenna device thus assembled at the directivity to a satellite, the antenna is turned around a straight line H by changing the length of the struts 13 and 14 and around a straight line D by changing the length of the strut 6. |
