Patent ID: 6597308
Filing Date: 2003-07-22
Classification: G01S

Abstract:
A radar apparatus for performing frequency modulation of a high-frequency signal, transmitting the frequency-modulated signal, and receiving a reflected radio wave to detect a target, the radar apparatus comprising:a high frequency generation section for generating the high-frequency signal; a modulation signal generation section for generating and giving a modulation signal to the high frequency generation section to modulate the high frequency signal; a mixing section for mixing the high-frequency signal and the reception signal of the reflected radio wave; and a signal processing section for controlling the modulation signal generation section so as to give a modulation signal for detection changing among a plurality of predetermined signal levels and retained for a predetermined time for each signal level to the high frequency generation section, detecting frequency of a differential signal between the high-frequency signal and the reception signal, inputted from the mixing section, and detecting a frequency modulation characteristic of the high frequency generation section based on the relationship between a signal level of the modulation signal for detection and the frequency of the differential signal.