Patent ID: 7205929

Claim:
A radar system comprising: a transmitter which transmits an electromagnetic wave; a receiver which receives a reflected wave of the electromagnetic wave that is reflected by an object; and a processor which determines distance to the object or azimuth of the object by processing a signal which is involved in the reflected wave that has been received by the receiver; wherein the receiver comprises a plurality of signal receiving antennas, which have approximately same signal receiving characteristics and directivity in approximately same direction, and which are arranged in a row with a predetermined gap, and the processor comprises: a received signal level detector which detects levels of signals that are received by the plurality of signal receiving antennas; and an object adhesion detector which decides that an external object is adhered to the front surface of the receiver, if dispersion between the levels of the signals that are received by the plurality of signal receiving antennas and that are detected by the received signal level detector, is greater than a predetermined value.