Using Multiple Auxiliary Antennas for Sidelobe Blanking to Counter Deception Jamming in Search Radars

The most common radar EP technique to prevent effects of impulsive interferences is SLB. In classical SLB structure, an auxiliary antenna and receiver channel are employed to discriminate between the main beam signal and the unwanted signals entering through the sidelobes of the main antenna. In this paper, we have proposed a new SLB structure which utilizes multiple auxiliary antennas. Then, by using an envelope-detection based demodulation, we have presented a group of processing logics including AND, OR and SUM to control the switch. Additionally, we have suggested a new method for setting the detection and blanking thresholds. Simulation results show that the proposed methods using multiple auxiliary antennas, outperform the conventional structure in terms of reducing the number of false target blips on radar PPI.