Research On Multiple Antennae Vector Synthetic False Target Method

Monopulse radar has the characteristics of high angle measurement accuracy and not easy to be interfered by enemy,so it has a wide application prospect.In this paper,a multi antenna vector synthesis false target angle deception jamming method based on multi vector synthesis is proposed to realize monopulse radar jamming.The jamming model is deduced and studied,and the electromagnetic simulation analysis is carried out on the platform of UAV.The effectiveness and feasibility of the jamming model are verified by simulation analysis.This paper first introduces the equal amplitude and phase amplitude comparison methods of monopulse radar.Then,the reverse cross eye jamming technology to realize effective angle deception jamming of monopulse radar is analyzed.Its strict parameter tolerance and sensitive platform angle are discussed,and its application limitations are pointed out.The multi-element vector synthesis method is also introduced,and the change trend of the position of the synthetic equivalent radiation center is analyzed.On this basis,a more freedom multi antenna vector synthesis false target deception jamming technology is proposed.Then,from the angle of the response of sum and difference channels of amplitude comparison monopulse radar to received signals,a strict mathematical model of multi antenna vector synthetic false target deception jamming is established,and the numerical simulation analysis of the model is carried out.Two feeding schemes to achieve the maximum jamming effect are summarized,and the effects of jamming antenna layout,jamming distance,carrying platform angle and parameter tolerance on jamming effect are studied.At the same time,compared with cross eye,the jamming model has more degrees of freedom,looser parameter tolerance and lower platform angle sensitivity.Then,based on the angle measurement mechanism of phase comparison monopulse radar,the multi antenna vector synthetic false target jamming model with target platform echo is deduced,and the requirements of processing gain and antenna gain of jammer are analyzed.Through simulation,the influence of the amplitude and phase of the platform echo signal on the jamming effect of the jamming model is analyzed.Finally,the UAV is selected as the carrying platform of jamming antenna,and the radar cross section of UAV model is analyzed.Taking UAV model as an example,the relationship between jammer signal processing gain and radar cross section of target platform is analyzed.Then,the electromagnetic simulation model of multi antenna vector synthetic false target deception jamming is established.At the same time,the spatial electromagnetic field distribution of radar receiving antenna is studied.Then the influence of UAV scattering characteristics on jammer jamming effect is analyzed.It is concluded that there will be phase distortion at the radar receiving antenna.This method can achieve the effect of false target angle deception jamming,and verify the effectiveness of the jamming model.