Patent ID: 7675457

Claim:
A radar system comprising: reception-signal-strength-distribution detector which transmits a beam of detection radio waves having a predetermined azimuth width extending from the left to the right of a predetermined azimuth at the center, receives a reflected wave from a target, changes a central azimuth of the beam, and detects the distribution of reception signal strengths at predetermined angular intervals and for each predetermined distance; and target-central-azimuth detector which detects an azimuth corresponding to a vertex of an approximate isosceles triangle as a central azimuth of the target on the basis of a beam azimuth width and reception signal strengths at two azimuths that are a central-azimuth-detecting azimuth width away from each other and located on the left and right of an azimuth corresponding to a maximum value in the reception signal strength distribution within a distance to the target, the approximate isosceles triangle having the beam azimuth width as its base and having two points representing the reception signal strengths on its two oblique sides when the reception signal strength distribution associated with changes in azimuth is expressed in rectangular coordinates.