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电磁场理论 （第四章）Electromagnetic Field Theory ( Ch.4) * 北京理工大学 Beijing Institute of Technology * 北京理工大学 Beijing Institute of Technology 盛新庆 （Sheng Xin-Qing） 电磁仿真中心 （Center for Electromagnetic Simulation） 北京理工大学信息科学技术学院 （School of Information Science and Technology，Beijing Institute of Technology） 电子信箱： xsheng@ 电话:/daoshi/博导网页/盛新庆.htm Scattering of EM Wave Scattering Determined Targets Random Targets Targets in free space Targets in layered medium Regular Targets Irregular Targets Cylinder 2D Sphere 3D Random Surface Random volume targets Smooth random surface Small rough random surface Rough random surface Numerical Methods Scattering by an 2D Cylinder Scattering by an 2D Cylinder Scattering by an 2D Cylinder Scattering by an 2D Cylinder Scattering by an 2D Cylinder Scattering by an 2D Cylinder Echo Width Scattering by an 2D Cylinder Scattering by an 2D Cylinder 。 Scattering by Conducting Sphere The scattering field of a plane EM wave by a conducting sphere can be analytically expressed. Radar Cross Section (RCS) Monostatic RCS, Backscatter RCS, Bistatic RCS Vertical Polarization (VV-Pol), Horizontal Pol. (HH-Pol), Cross Polarization Scattering by Conducting Sphere Analytical Approcah for Scattering by Regular Targets Choose a suitable coordinate system, construct a complete eigenfunction system. Express the incident field and scattering field with unknown coefficients with the eigenfunctions, then determine the unknown coefficients according to the boundary condition How to express the incident field with the eigenfunction? Transformation from plane wave to cylindrical wave Transformation of cylindrical waveat cylindrical coordinates with different origion