| Most modern tracking radars have the advantages of high accuracy and strong antijamming capability,which greatly increases the risk of high-value targets such as missiles and aircraft being exposed on the battlefield.Innovating self-defense interference methods and protecting high-value maneuvering targets on the battlefield has become a core issue in the field of electronic countermeasures.Electromagnetic metasurface has the advantages of flexible maneuverability,fast response time,and strong concealment of traditional passive jamming.In addition,the accurate control of radar echo can be achieved by changing its electromagnetic scattering characteristics in an appropriate way,which makes it useful in the field of tracking radar countermeasures.It has a very broad application potential.This paper will take the self-defense protection of high-value targets on the battlefield as the background,and on the basis of the electromagnetic supersurface to achieve target scattering characteristics control,in-depth study of the impact of target scattering characteristics control on tracking radar,the main research contents are as follows:First,the basic principles of two electromagnetic metasurfaces,Active-FrequencySelective-Surface and Phase-Switched-Screen,are introduced,and the influence of electromagnetic metasurfaces on radar echo characteristics is analyzed in detail from the signal level;Secondly,a new type of AFSS-based dual-band amplitude modulation reflector was designed,the influence of structural design parameters and other factors on the reflector’s reflection performance was studied in detail,and experimental samples were made and tested.Finally,the application of the electromagnetic metasurface tracking radar in selfdefense interference is studied,the conditions for the electromagnetic metasurface to form an effective interference output are deduced,and a variety of interference patterns are proposed for different tracking systems.The research results show that this new type of self-defense jamming method that uses passive jamming to achieve active jamming effects provides a new idea for solving the problem of protecting high-value targets on the battlefield. |
