【摘要】 提出了分形大气湍流中导体目标的电磁散射理论 ,导出了分形大气湍流中光滑导体目标散射场的一阶矩和二阶矩。给出了平面波和球面波入射下互相关函数和结构函数随分维的变化关系。以光滑导体圆盘为例计算了其归一化后向散射截面σn。结果表明对于具有分形谱分布特征的大气湍流 ,分维对 σn 有较大影响。更多还原

【Abstract】 A theory of electromagnetic wave scattering from a conductor target surrounded by fractal atmospheric turbulence was presented, the first and second order moments of the scattering fields had been derived by considering the effects of the fractal atmospheric turbulence. The relationships between the mutual coherence function, structure function and fractal dimension were given with plane wave of incidence and spherical wave of incidence, respectively. The normalized backscattering radar cross section σ n of a perfectly conducting disk was calculated.It is shown that the influence of fractal dimension on σ n is obvious for the atmospheric turbulence with distribution of fractal spectrum.更多还原