| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an antenna having a structure wherein a radiation part is not affected by waves, always rotates on a specified circumference, and surely radiates and propagates electromagnetic waves toward a distant target. SOLUTION: In this antenna, movable retaining mechanism of a pedestal which movably retains a pedestal part 2 by applying a specified load in the gravitational direction, in order to make the horizontal installation surface movable and always rotate the antennas vertically to the gravitational direction consists of oil 5 which floats the pedestal part 2 by the dipping of its end portion, a cabinet 3 in which an oil reservoir 3a is formed, a load body (weight) 4 which is accommodated in a load accommodating part 4b formed in a local part just under the oil reservoir 3a of the cabinet 5 and applies a specified load, a coupling segment 7 wherein one end is coupled with an end portion central part of the pedestal part 2 and the other end is coupled with the load body 4 in the load accommodating part 3b through a bottom part 3a' of the oil reservoir 3a, and stays 6 which are fixed vertically to the stretching direction of the radiation part 1 in the oil reservoir 3a and retain the pedestal part 2 rotatably around the axial direction.</p> |
