Study On The Electromagnetic Scattering Interaction Between The Simple Target And Rough Surface

In this paper, the reciprocity theorem is used to studied the problem of electromagnetic scattering from two adjacent targets. Taking the advantage of this newly developed technique, the difficulty in formulating the secondary scattered fields from the composite target reduces to the evaluation of integrals involving the polarization currents of one target and the scattered fields from the other. Based on the above results, the problems of the electromagnetic interaction between a perfect conducting plate and 1-D/2-D conducting slightly random rough surface and the problems of the electromagnetic interaction between a dielectric spherical particle and dielectric slightly random rough surface are investigated. By using the reciprocity theorem, Small Perturbation Method (SPM) and Physical Optics (PO) approximation, the solution for the composite scattering field from the composite target is derived and evaluated, and the numerical results are discussed and analyzed. The composite electromagnetic scatterings from a plate/ a spherical particle above 1-D time-varying fractal surface are also examined, by applying the reciprocity theorem and combining PO and Mie theory, the analytical solution for the composite scattering field is obtained under Kirchhoff (KA) for rough surface, the fractal characteristic of the composite backscattering signal is estimated and analyzed. In addition, the Doppler spectrum of the backscattering signal from the composite model of the plate above the time-varying fractal surface is studied in detail, and the influence of the target on the Doppler spectrum of the scattering field is discussed.