| 摘要 |
PROBLEM TO BE SOLVED: To acquire radio waves even when a moving body is turning by rotating an antenna on the moving body, selecting the subsequent antenna orientation control in response to the turning state of the moving body when the reception intensity of the signal received by the antenna becomes the first value or above, and obtaining the reception intensity of the second value or above. SOLUTION: An ADD converter 12 is inputted with the analog type reception intensity signal from a receiver 16 and the angular velocity signal from an angular velocity sensor 11 and converts and outputs them into digital signals. An arithmetic device 13 judges and controls the acquiring action and tracking action. If the reception intensity is changed from an increase to a decrease when the moving body is linearly advanced or stopped, the rotation of an antenna 17 is stopped. If the rotating direction of the antenna 17 and the turning direction of the moving body are the same, the rotation of the antenna 17 is stopped when the reception intensity is increased. The antenna 17 is directed to the direction where nearly the maximum reception intensity can be obtained. |
