Analysis Of Electromagnetic Scattering Of Complex Rotationally Symmetric Body In A Half Space Environment

The usage of the axisymmetric property of the body of revolution(BoR) can translate an original electrically large BoR-problem into a series problems with small size of matrix equations,namely a Fourier mode of the original one,which can greatly improve the computational efficiency and reduce the memory requirements.In this thesis,the accurate and efficient analyses of electromagnetic scattering of complex BOR above half space has been realized by the development of method of moments for BOR.This paper mainly researches electromagnetic scattering from dielectric bodies of revolution above a lossy half space.A set of Poggio-Miller-Chang-Harrington-Wu (PMCHW) are formulated via Maxwell's equations,potential functions,equivalent principle and the boundary conditions.Introducing the dyadic Green's functions of exterior equivalent integral equations are computed by the discrete complex image method.With the rotational symmetry,the unknown equivalent surface currents(electric currents and magnetic currents) can be expanded in Fourier series inφand sectional function in t.Finally,a solution of each Fourier model matrix equation is solved by the methods of moment.Because each mode is orthogonal to the others,the problem can be solved under each mode respectively and each solution is summed up subsequently.Thus it reduces greatly the sum of unknown variable and the calculational time.The problem of electromagnetic scattering from homogeneous chiral BOR in free space and above a lossy half space is further studied in this thesis.A set of PMCHW for the unknown equivalent electric and magnetic currents on the chiral BOR's surface are formulated,it is based upon using equivalent principle,the boundary conditions and the technique of wave decomposition.The PMCHW is solved using the method of moments in a formulation as the problem of dielectric BOR.Finally,the accuracy and efficiency of the methods proposed in this thesis has been validated by some representative numerical results.