Radar device

Details Radar device Radar device

2005-12-22

2010-06-15

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Determining velocity

Combined with determining distance

C342S070000, C342S094000, C342S110000

Reexamination Certificate

active

07737882

ABSTRACT:
A radar device can reliably, and rapidly detect dirt adhered to a radome surface without misdetection. The radar device includes a transmit/receive shared antenna (306) that transmits an electric wave to an object and receives a reflected wave that has been reflected from the object, a mixer (307) that mixes a transmission signal and a reception signal together to generate a beat signal, and a signal processing unit (312) that measures a distance to the object and a relative speed of the object on the basis of the beat signal. The transmit/receive shared antenna (306) modulates an unmodulated wave into a pulse and transmits the pulse modulated wave at a specific timing. In the case where the unmodulated pulse is transmitted, the beat signal that has been generated by the mixer (307) is converted into a digital voltage value by an A/D converter (310). The signal processing unit (312) detects the dirt that is adhered to the radome (314) of the transmit/receive shared antenna (306) on the basis of an output of the A/D converter310.

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