US 11,841,457 B2
Radar device, control circuit of radar device, and storage medium of radar device
Koji Tsutsumi, Tokyo (JP); Tatsuya Hagiwara, Tokyo (JP); and Mitsuhiro Shimozawa, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Filed by MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Filed on Dec. 1, 2020, as Appl. No. 17/108,820.
Application 17/108,820 is a continuation of application No. PCT/JP2018/021947, filed on Jun. 7, 2018.
Prior Publication US 2021/0109193 A1, Apr. 15, 2021
Int. Cl. G01S 7/40 (2006.01); G01S 13/34 (2006.01)
CPC G01S 7/40 (2013.01) [G01S 7/4017 (2013.01); G01S 13/341 (2013.01); G01S 13/343 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A radar device comprising:
a transmitter including a first signal source to generate a transmission chirp signal synchronized with a reference signal;
a receiver including a second signal source to generate a reception chirp signal synchronized with the reference signal, the receiver receiving a reflected wave of the transmission chirp signal emitted from the transmitter, and mixing the received reception signal with the reception chirp signal; and
a signal processor to detect a target on a basis of a beat signal generated by the mixing by the receiver, wherein
the signal processor controls at least one of the first signal source or the second signal source to maintain constant a frequency difference between the transmission chirp signal and the reception chirp signal, and corrects a change in a phase difference between the transmitter and the receiver, using a phase of a signal of a direct wave from the transmitter to the receiver.