Radar Performance of Stone Imitation Equipment Based on Maxwell's Law
SONG Xuchao
ZHANG Wei
LI Mingyu
YU Yingxia
LIU Keke
Abstract：In camouflage engineering,to reduce the radar exposure characteristics of rock-like stone equipment,a radar absorbing structure can be added to the outer layer of the metal skeleton.The electromagnetic loss materials of high conductivity materials(graphite powder)and high magnetic permeability materials(Fe3O4 powder)were taken as absorbing structures,an impedance progressive layered radar absorbing structure was designed based on Maxwell's law.Through electromagnetic simulation,it is determined that when the mass ratio of electromagnetic loss materials is graphite powder:Fe3O4 powder=1∶3 and the structure is layered into 3 layers,the electromagnetic shielding performance of the absorbing structure is optimal.Based on this,an absorbing concrete test block was prepared,and the radar shielding effect of the absorbing concrete test block relative to the ordinary concrete test block was studied through experimental comparison.The results show that at a frequency of 2～18 GHz,the radar reflectivity bandwidth of the absorbing concrete test block is 8.1 GHz which is less than-10 dB when the incident angle is 60°,accounting for 45％of the total,and the radar reflectivity bandwidth 6.8 GHz which is less than-10 dB when the incident angle is 30°,accounting for 37.8％of the total.The average reflectivity is 5.08 dB lower than that of ordinary concrete.The developed radar absorbing structure has obvious wave absorption effect and wide absorption bandwidth,which provides technological support for radar camouflage of imitation stone equipment.
Keywords：layered impedanceelectromagnetic lossradar reflectivitystone imitationcomposite materialcamouflage
Publication Date：2025-04-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 69-77 )