RADAR DEVICE AND TRANSPONDER RESPONSE DELAY ACQUIRING METHOD

The purpose is to provide a radar device capable of accurately acquiring a delay time from a detection signal reaching a transponder to the transponder transmitting a response signal. The radar device includes a response signal detector, a transponder reflection wave detector, and a response delay acquirer. The response signal detector detects the response signal transmitted from the transponder in response to the detection signal, from a reception signal that is a received reflection wave of the detection signal transmitted from an antenna. The transponder reflection wave detector detects the reflection wave appearing at a timing earlier than the response signal in the reception signal as the reflection wave of the transponder. The response delay acquirer acquires a response delay of the transponder based on a time difference between the reflection wave and the response signal.