| 摘要 |
<p>PROBLEM TO BE SOLVED: To estimate a shift direction of an antenna axis at a low cost.SOLUTION: An antenna device comprises: an antenna 10 comprising a planar two-dimensional array antenna 10A and one-dimensional array antennas 10B, 10C, each of which obtains maximum directivity in a direction differing from those of the others; and detectors 11A, 11B, and 11C connected to the planar two-dimensional array antenna 10A, and one-dimensional array antennas 10B, 10C respectively. When reception power strength of the detector 11A decreases; the antenna device estimates a direction of a shift of the antenna 10 on the basis of a combination of change of reception power strength of the detectors 11B, 11C, and adjusts a direction of the antenna so that the reception power strength of the detector 11A connected to the planar two-dimensional array antenna becomes maximum.</p> |
