Communications: directive radio wave systems and devices (e.g. – Return signal controls external device – Radar mounted on and controls land vehicle
Reexamination Certificate
2007-11-27
2007-11-27
Sotomayor, John B (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Return signal controls external device
Radar mounted on and controls land vehicle
C342S107000, C342S108000, C342S113000, C342S173000
Reexamination Certificate
active
11189732
ABSTRACT:
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 5λ/4 and 6λ/4, respectively, and it is determined whether the difference between the azimuth obtained from the combination of the receiving antennas spaced 5λ/4 apart and the azimuth obtained from the combination of the receiving antennas spaced 6λ/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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Honda Kanako
Nakano Masao
Fujitsu Limited
Fujitsu Ten Limited
Oliff & Berridg,e PLC
Sotomayor John B
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