Patent ID: 7436348

Claim:
An interferometer-type radar comprising: a transmitter for transmitting a signal to a target; and a receiver having a large-diameter array antenna for receiving a reflection signal reflected from the target, wherein the transmitter has a function of outputting an FMCW signal for detecting direction and velocity of the target from a transmitting antenna, and the receiver includes: a plurality of correlation processors for performing correlation processing to receiving signals received by respective interference blocks configured such that the large-diameter array antenna is divided into a plurality of equal blocks; a synthesizer for vector-synthesizing same signal components by modulating both a phase and an amplitude of signals outputted from the plurality of correlation processors; a data processor having a function of obtaining the direction of the target with a low spatial resolution based on a reflection signal from the target received by a largest aperture of the large-diameter array antenna; and a target selection unit for obtaining the direction of the target with a spatial resolution according to a largest distance between antennas by performing digital beam forming of the receiving signal before the correlation processing.