Mainlobe Jamming Detection Method Based on Diagonal Difference-Channel and Millimeter Wave Experiment Verification

The towed decoy jamming forms the two points in the millimeter wave radar beam through the cooperative movement with the target, which causes wavefront distortion and achieves angle deception jamming. Detection of towed radar decoy(TRD)is the precondition and foundation to counter TRD in ECCM. By mathematical model derivation and simulation, the difference of the imaginary part of complex monopulse ratio within TRD are analyzed when it exists or does not exist. Diagonal difference (Deta-deta) channel of monopulse radar is introduced and joint used. A new detection method by using diagonal difference channel and two threshold is proposed. The simulation and millimeter wave chamber experiment result shows the presented detection method can detect the TRD correctly and provides an efficient and simple method to the detection of TRD.