Research On The Key Technology Of Distributed Multiple-element Retrodirective Cross-eye Jamming

Cross-eye jamming is an interference way against a monopulse radar by producing an angular deception.The multiple-element retrodirective cross-eye jamming compared with the traditional two-element cross-eye jamming increases the degree of freedom of the system,loose the tolerance requirements and reduces the jammer-to-signal ratio,as the development trend of cross-eye jamming field nowadays.However,the research on multiple-element cross-eye jamming is not comprehensive,and there are still many practical problems to be solved in the process of forming weapons and equipment.In this paper,the distributed jammer antennas system compatible with the large ship platform is designed in the background of a large ship platform against the anti-ship missile.And it study the practical problem of the path-length differences between multiple jammer loops of distributed multiple-element retrodirective cross-eye jamming depth,carefully analyzes the effectiveness of cross-eye jamming under the actual combat background,which provides an effective means of self-defense for our ships and the other important military targets.In the Chapter 1,there is the introduction,mainly introduces the research background and significance of this article,summarizes the research status of cross-eye jamming,and discussed the research progress of multiple-element retrodirective cross-eye jamming which is in the development trend of cross-eye jamming nowadays,points out the application limit of multiple-element retrodirective cross-eye jamming.Finally,it introduces the main work and the main content of paper arrangement.In the chapter 2,a distributed multiple-element retrodirective cross-eye jamming system is proposed on the basis of introducing the principle and mathematical model of two-element retrodirective cross-eye jamming.The antenna space configuration of jammer system not only fits ship platform,and adopts the design of short baseline,avoids that the long baseline leads to separate jamming return and platform return causing the cross-eye jamming to be recognized easily.At the same time,the performance indexes including monopulse indication angle and cross-eye gain are deduced under the condition of cross-eye jamming against the phase-comparison monopulse radar.Finally,according to the simulation,we analysis the jamming performance of distributed multiple-element retrodirective cross-eye jamming system,discuss the effect of affected factors and multiple-element retrodirective cross-eye jamming with multi degree of freedom,loose tolerance of parameters and other advantages.In the chapter 3,we analyze the path-length differences between multiple loops,which can produce serious influence on the jamming performance of multiple-element retrodirective cross-eye jamming,and propose a dynamic compensation method.In the actual jamming scenario,the Taylor series expansion is used to derive the compensation formula of the path-length differences between multiple loops,which avoids the possibility of the jammer becoming beacon under the influence of the path-length differences of jamming loops.At the same time,we derive partially the compensation formula of measurement of the jamming range and the rotation angle of the jammer loop,analyze the sensitivity of compensation precision of path-length differences to the jamming range and the rotation angle of the jammer loop,and use the simulation to prove the feasibility of the compensation method.In the chapter 4,the jamming process of distributed multiple-element retrodirective cross-eye jammer against phase-comparison anti-ship monopulse radar is analyzed and discussed,and the actual interference effect of cross-eye jammer is simulated and calculating.In the jamming process,according to the beam width and indication angle of monopulse radar,we model and calculating the jamming range of anti-ship missile distinguishing between the true target and the false target.On the basis,assuming that the anti-ship missile is close to the real target at the maximum overload after distinguishing,we deduce the position of the missile,and verify that the cross-eye can meet the requirements of jamming.At the same time,the chapter analyze the influence that the jamming range of the jammer beginning to jam,the baseline length of jamming loops and the distance between the two jammer loops effect on the actual jamming result in the simulation experiments.Then we give an example to illustrate the considering factors of setting up the jammer parameters and the calculation process of jammer parameters,and finally propose some suggestions on the jammer parameters setting.In the chapter 5,the summary and prospect of the work is illustrated.This chapter summarizes the main research work and innovation points of this paper,and points out the contribution of this paper to the practical aspect of multiple-element retrodirective cross-eye jamming.What's more,the direction of further research on the combination jamming and the irrational antenna configuration in the next step of cross-eye jamming is proposed.