| 摘要 |
A tracking antenna apparatus mounted on a vehicle for a satellite communication according to the present invention has first and second antennas having different phase centers thereof and disposed to detect the frame synchronization signal period of a reception frame from the reception signal of either one antenna. The reception signals of the first and second antennas are sequentially output during the detected frame synchronization signal period, the phase difference of the reception signals is detected, the direction error of the first and second antennas is calculated from the detected phase difference, and the directions of the first and second antennas are corrected on the basis of the direction error.
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