Radar target detection method and radar apparatus using the target detection method

摘要

A radar device includes a transmission antenna (40) and a reception antenna (50) having a plurality of antenna elements (51) to (55). The radar device switches the antenna elements (51) to (55) in synchronization with a modulation cycle, thereby obtaining a reception signal. At this time, the radar device obtains the reception signal by switching the antenna elements using a first measurement phase and a second measurement phase having different switching cycles as one set. The radar device calculates an azimuth sine value sin ¸ 1 from the reception signal in the first measurement phase and also calculates an azimuth sinusoidal value sin ¸ 2 from the reception signal in the second measurement phase. Then, the radar device calculates a relative velocity V from the azimuth sine value sin ¸ 1 , the azimuth sine value sin ¸ 2 , an interval time difference ”t between switching cycles, and an inter-antenna element spacing d.