| 摘要 |
PURPOSE:To decrease an antenna turning radius and to miniaturize a radome by adopting the constitution that the mechanism of a drive shaft is constituted so that centers of each axis are crossed at a point or approach together. CONSTITUTION:The antenna is constituted so that centers of all drive axes to an elevating angle, lateral and longitudinal shaking of a mobile body and an azimuth angle are crossed at a point or approach together. Drive shafts El, El' adjusting the antenna elevating angle and drive shafts X, X' adjusting the component around the XX' axes of a tilt angle due to the lateral and longitudinal shaking of the mobile body are constituted in common coaxially. Further, drive shafts YY' (shafts perpendicular to the XX') adjusting the component around the YY' axes of lateral and longitudinal shaking are constituted that its center is placed in the center of the XX'. Since the center of each shaft is crossed at a point, the connecting point of the shafts is provided in the vicinity of the bottom of a parabolic antenna AT. That is, the turning radius of the antenna AT is decreased by the share, resulting that the inner diameter of the radome covering the turning antenna is decreased. |
