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为探讨膨胀石墨作为3mm波干扰材料的消光、散射特性及其影响因素,基于有限长度、有限电导率圆柱状导体的电磁散射,利用矩量法建立了膨胀石墨的消光、散射、吸收及后向散射截面(雷达散射截面RCS)的计算式.运用Mathematica编程计算并分析了膨胀石墨长度、半径、电导率、磁导率等因素与膨胀石墨消光、散射、吸收截面及RCS的关系.结果表明:当膨胀石墨的长度为1.5mm、半径为0.05mm时,具有较好的消光、散射效果;适当增大膨胀石墨的电导率、磁导率,有利于提高其消光、散射能力.本研究为探索增强膨胀石墨干扰3mm波效果的技术途径提供了有价值的参考.
In order to investigate the extinction and scattering properties of expanded graphite as interference material of 3mm wave and its influencing factors, the extinction, scattering, absorption and backward direction of expanded graphite were established by the moment method based on the electromagnetic scattering of finite length and finite conductivity cylindrical conductor. The calculation formula of the scattering cross section (RCS) is calculated and analyzed by Mathematica.The relationship between the extinction, scattering, absorption cross section and RCS of expanded graphite is calculated and analyzed.The results show that: When the length of expanded graphite is 1.5mm and the radius is 0.05mm, it has good extinction and scattering effects. Appropriately increasing the electrical conductivity and permeability of expanded graphite can improve the extinction and scattering ability of expanded graphite.In this study, Provide a valuable reference for enhancing the technical means of interfering with 3mm wave effect of expanded graphite.