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Advanced monopulse processing of phased array radar

This paper describes a 4-channel monopulse radar system with an additional delta-delta beam. Schemes for generation of this beam are considered for rectangular array as well as for circular array. This additional degree-of-freedom can be used to provide a secondary set of monopulse ratios. A scheme is derived where the two sets of monopulse ratios are combined before processing. The two sets of monopulse ratios complement each other and as a result, angle estimation accuracy is improved with mitigation of beam-shape loss.