RADAR DEVICE AND RADAR SIGNAL RECEPTION METHOD

PROBLEM TO BE SOLVED: To simplify a configuration of receiving a radar signal.SOLUTION: A radar device comprises: an antenna 2 that receives a radar signal transmitted at a predetermined timing and reflected upon a target; an RF amplifier 7 that amplifies the radar signal; an A-D converter 8 that samples the amplified radar signal by a sampling frequency; a reception side oscillator 9 that transmits to a phase detector 11 a COHO' signal having a value in which a difference between a frequency of a local signal and a value obtained by adding a frequency of a COHO signal or a value obtained by subtracting the frequency of the local signal and the frequency of the COHO signal from the sampling frequency is a threshold value or less as a frequency; an adjustment section 10 that initializes a phase of the COHO' signal at the transmission timing; the phase detector 11 that causes the sampled radar signal to be branched, generates and outputs an I signal and a Q signal by detecting one of the sub-branched radar signals by the COHO' signal and detecting the other thereof by a COHO' signal having the phase displaced at 90 degrees; and a frequency detector 12 that detects a Doppler frequency from the I signal and the Q signal.