Patent ID: 8482457

Claim:
A radar apparatus which radiates an electromagnetic wave, receives a reflected wave caused by the electromagnetic wave reflected from an object, and detects the presence direction in which the object is present, the radar apparatus comprising: an electromagnetic wave radiating section configured to radiate the electromagnetic wave; a reflected wave reception section configured to receive the reflected wave and detect information about the received reflected wave; a reflected wave type estimation section configured to determine which the type of the received reflected wave received by the reflected wave reception section is, a single reflected wave which is just reflected from an object, or a composite reflected wave which is composed of a plurality of reflected waves, reflected from different objects, that have interfered with each other, based on the information about the received reflected wave; and a direction calculation section configured to calculate the presence direction of an object, based on the result of the determination by the reflected wave type estimation section, wherein the reflected wave reception section includes: a first antenna configured to detect at least the amplitude level of the received reflected wave as the information about the received reflected wave; and a second antenna which is separately provided at a given position on a plane including the reception surface of the first antenna, the second antenna being configured to detect at least the amplitude level of the received reflected wave as the information about the received reflected wave, and the reflected wave type estimation section is configured to determine which the type of the received reflected wave is, a single reflected wave or a composite reflected wave, based on the magnitude relationship between the amplitude level of the received reflected wave detected by the first antenna, and the amplitude level of the received reflected wave detected by the second antenna.