Patent ID: 6400311
Filing Date: 2002-06-04
Classification: G01S

Abstract:
A radar rangefinder comprising: a transmitting/receiving antenna arranged on a rotating platform for monitoring a danger area, a radome housing for accommodating the transmitting/receiving antenna, and a reflector arranged at a known distance in order to preset a calibration for the rangefinder, wherein:a) the reflector is provided by an auxiliary antenna, which is likewise arranged in the radome housing; b) the auxiliary antenna is coupled to a delay line, the delay line having a shortening factor, an actual length, a virtual length, and an end, the end of the delay line being coupled to the housing; c) the delay line is arranged together with the auxiliary antenna on an inner wall of the radome housing; and d) the virtual length of the delay line is greater than the actual length of the delay line.