| 摘要 |
In an FM-CW radar apparatus which determines the azimuth to a target by a phase monopulse technique, an abnormal value resulting from the presence of multiple targets is detected. Three receiving antennas are arranged at spacings of 5lambda/4 and 6lambda/4, respectively, and it is determined whether the difference between the azimuth obtained from the combination of the receiving antennas spaced 5lambda/4 apart and the azimuth obtained from the combination of the receiving antennas spaced 6lambda/4 apart is smaller than a predetermined value or not; when the condition has been satisfied n times in succession, it is determined that the detected value is normal. On the other hand, if the condition has not been satisfied n times in succession, or if the difference is not smaller than the predetermined value, it is determined that the detected value is an abnormal value resulting from the presence of multiple targets.
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