| 摘要 |
PURPOSE:To contrive to save the energy and to reduce the cost by placing a ball screw which is driven by a motor and brought to linear displacement, in a position opposed to the rotation center, and driving directly an antenna by a displacement of the ball screw. CONSTITUTION:A spherical bearing 8 supports an antenna 8 so as to be freely rockable. In case of oscillating the antenna 3 in the direction as indicated with an arrow A, it can be executed by moving a ball screw 10 in the direction B and the direction C, respectively, and a motor 13 is rotated by monitoring an angle detector 14. As for the ball screw 10 and the motor 13, etc., a pair of objects are integrated in the orthogonal direction, and the antenna 3 can be oscillated in the biaxial direction. The movable part is basically only the ball screw and the antenna, and the driving energy can be reduced, and also, as for a radius of rotation of the antenna, a small one will suffice since it is unnecessary to load the motor, etc., on the movable part, the aperture diameter of the antenna can be enlarged by that portion, and the performance can be improved. |
