Patent ID: 8624775

Claim:
A radar apparatus comprising: a transmitting unit that generates a probe wave including a continuous wave; an antenna unit including a transmission antenna that radiates the probe wave to a space and a reception antenna that receives a reflected wave from a target of the probe wave; a receiving unit that outputs a signal obtained by down-converting a reception signal from the reception antenna into a predetermined frequency band; and a signal processing unit that applies a predetermined frequency analysis to the signal output from the receiving unit and outputs information concerning one or more of a distance to the target, a relative speed to the target, and a direction in which the target is present, wherein when a detection area of the target is classified into a first detection area that is an area at a distance closer than a set distance set in advance and at an angle wider than a set angle set in advance and a second detection area that is an area at a distance farther than the set distance and on an inner side of the set angle, the reception antenna includes a plurality of antennas for reception as array antennas and, in the reception antenna, a reception first array that probes the first detection area using a predetermined number of antennas adjacent to one another among the plurality of antennas for reception and a reception second array that probes the second detection area using all the antennas are configured, the transmission antenna is shared as an antenna for probe of the first and second detection areas, second null of a radiation pattern by the transmission antenna and first null of a reception pattern by the reception second array are substantially matched, and a level difference between a first side lobe of the radiation pattern of the transmission antenna and first null of the radiation pattern is within a predetermined value.