Patent ID: 8587470
Filing Date: 2013-11-19
Classification: G01S

Abstract:
1. A radar apparatus that detects a target by aperture synthesis of signals obtained from receiving antennas in an array antenna having a plurality of antenna elements, each of which is used as at least one of transmitting antennas and receiving antennas, comprising: an envelope detector unit that acquires an envelope component of a signal obtained from a receiving antenna in at least one combination of a plurality of combinations of transmitting antennas and receiving antennas whose spatial phases become equal to each other in the array antenna; a determination unit that determines a time lag of the envelope component acquired by the envelope detector unit as an amount of compensation in the at least one combination; and a compensator unit that compensates a phase of the signal obtained from each of the receiving antennas before synthesis by using the amount of compensation determined by the determination unit, or compensates a phase of a signal radiated from the transmitting antenna in another combination different from the at least one combination.