Patent ID: 8400350

Claim:
A radar device, which transmits radar waves in a reference direction, receives the radar waves reflected by a target as received waves, and detects an azimuth angle of the target relative to the reference direction, comprising: an azimuth angle detection unit configured to detect the azimuth angle based on a phase difference between a first pair of received waves received by a first pair of antennas separated by a prescribed distance; a composite wave generation unit configured to combine the first pair of received waves and to generate a first composite wave; and an azimuth angle judgment unit configured to judge that (1) when an amplitude level of the first composite wave at a detected azimuth angle detected by the azimuth angle detection unit is equal to or greater than a first threshold value, the target is present at the detected azimuth angle, and (2) when the amplitude level of the first composite wave at the detected azimuth angle is lower than the first threshold value, the target is not present at the detected azimuth angle.