Radar device and radar method

摘要

The invention is to make possible to reduce an error detection of a detection object article in a front. For example, in a case where, in the beginning, a reception signal with respect to a transmission signal from a wide angle transmitting antenna has been received, a monopulse type radar operates an angle from that reception signal and, on the basis of that angle, judges whether or not there is an existence possibility of a front target. In a case where there has been judged that there is the existence possibility, the monopulse type radar switches to a narrow angle transmitting antenna whose half value angle of a directivity is narrower than the wide angle transmitting antenna, operates an angle from a reception signal with respect to a transmission signal from the narrow angle transmitting antenna and, on the basis of that angle, judges whether or not the front target has been detected. And, in a case where there has been judged that the front target has been detected, the monopulse type radar outputs a target detection signal. The invention can be applied to the monopulse type radar.