Radar device and target detecting method

A radar device configured to calculate an angle of a target based on a phase difference between reception signals obtained by receiving reflected waves from the target with a plurality of receiving antennae, the radar device comprising:

• a transmitting unit configured to alternately transmit a first transmission wave and a second transmission wave having different beam patterns;
• a calculating unit configured to calculate reception levels of the respective reception signals of the reflected waves by the first transmission wave and the second transmission wave, and an estimate angle at which the target is estimated to exist, on the basis of the reception signals;
• a first determining unit configured to determine a degree of reliability of a level difference between the reception levels calculated by the calculating unit, on the basis of a comparison between the level difference with a reference value of the level difference which is associated with the estimate angle in advance;
• and
• a second determining unit configured to determine whether the target exists at the estimate angle, on the basis of a determination result of the first determining unit and the reception level based on the first transmission wave.