| 摘要 |
The present invention relates to a radar apparatus that uses a plurality of transmitting/receiving antennas A 1 -A 4 and receives a reflected wave, of a transmitted wave, reflected from a target. By utilizing the property that the path of the transmitted wave from an antenna A 1 and its reflected wave and the path of the transmitted wave from the next selected antenna A 2 and its reflected wave share the same spatial system, and therefore that both received signals have the same characteristics in terms of frequency and phase, a judgment is made as to whether there exists any difference between the receiving characteristics of the antennas, and the received signal is corrected in accordance with the result of the judgment. It is also possible to judge the presence or absence of a change in the characteristic of each antenna, and apply a correction accordingly, even during the normal operation of the apparatus.
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