A Low-Cost Anti-Jamming Capability Employing Sequential Nulling and Adaptive Processing (SNAP)

Modern military radar systems must be capable of operating effectively in the presence of severe jamming or electronic countermeasures (ECM). Use of low sidelobe antennas, especially for receive patterns, is the foremost method of reducing theof jamming; however, low sidelobe antennas alone are usually not sufficient. Several other techniques are used to minimize the effects of a jammer, but these are often very expensive to implement, especially when retrofitting these capabilities in productimprovement programs. This paper presents a novel, low-cost technique that can be used with existing or new phased array antennas to provide very effective anti-jamming capabilities. A successfully implemented SNAP algorithm, as discussed in this paper,would have major benefits to applications involving phased array RF sensors, which could be susceptible to intentional or unintentional interference. Such benefits include:¿Very cost-effective anti-jamming capabilities for new phased array radars.¿Very cost-effective jamming-suppression upgrades to existing phased array radars.