SUPPRESSION RADAR FOR SEA SURFACE REFLECTED SIGNAL

摘要

PURPOSE:To suppress the sea surface reflected signal by detecting a horizontal and an vertical polarized component from a reflected signal from a target and signals of their vector sum and vector difference, and processing those signals. CONSTITUTION:Sent pulses from a transmitter 10 are reflected by the target, received by an antenna 14, and sent to a circular polarized wave generator 13. A 1st detector 24 and a 2nd detector 25 detect IF signals of the horizontal and vertical polarized components of the reflected radio wave. Further, a 3rd detector 28 and a 4th detector 29 detect the IF signals of the vector sum of and vector difference between the horizontal and vertical polarized wave components. A polarity signal generator 38 generates a polarity signal by using the outputs of those detectors. Then the output of single-polarity conversion is subtracted from the outputs of the 3rd detector 28 and 4th detector 29 and then the difference are summed up; and a mean removing circuit 43 removes the mean value from the sum output and the removal output is polarity- converted by a polarity converter according to the output of the generator 38. Thus, the sea surface reflected signal is suppressed.