| 摘要 |
PROBLEM TO BE SOLVED: To prevent a flying object from being detected.SOLUTION: The antenna device has an antenna and a rolling mechanism. The antenna has an antenna face for receiving a radio wave. The rolling mechanism rotates the antenna on a rotational axis which has a predetermined angle with respect to a normal line of the antenna face. The antenna device is provided to a flying object which flies toward a target. By rotating the antenna by means of the rolling mechanism, the radio wave which is reflected by the antenna face toward the target irrespective of the posture of the flying object can be reduced. With this, the flying object can prevented from being detected.SELECTED DRAWING: Figure 2 |
