This paper presents a new modeling method for a general curved surface and a more efficient scattering model to account for the scattering contribution of complex targets with shaped external surface. Before RCS analy...This paper presents a new modeling method for a general curved surface and a more efficient scattering model to account for the scattering contribution of complex targets with shaped external surface. Before RCS analysis, the actual external surface is divided into facets with different shapes. The calculation for scattering field of a single facet is based on PO PTD (Physical optics Physical theory of diffraction) model and the whole scattering field of the target can be obtained by phase synthesis. A calculation example is given to verify the validity of both the model and the modeling method. Time dependence e jwt is suppressed throughout this paper.展开更多
Contour integration of physical optics (P.O.) and the method of equivalent current(MEC) are used to compute and analyze the monostatic RCS and high-frequency electromgnetic scattering characteristics of coated rectang...Contour integration of physical optics (P.O.) and the method of equivalent current(MEC) are used to compute and analyze the monostatic RCS and high-frequency electromgnetic scattering characteristics of coated rectangular metal plate. Both principal plane and non-principal plane are considered. For the method of equivalent current, a diffraction coefficient of impedance wedge is introduced and parallel strip models are emploved to solve the diffraction problems of non-principal plane. A good agreement is obtained between these two methods. and the results demonstrate the correctness of the methods.展开更多
文摘This paper presents a new modeling method for a general curved surface and a more efficient scattering model to account for the scattering contribution of complex targets with shaped external surface. Before RCS analysis, the actual external surface is divided into facets with different shapes. The calculation for scattering field of a single facet is based on PO PTD (Physical optics Physical theory of diffraction) model and the whole scattering field of the target can be obtained by phase synthesis. A calculation example is given to verify the validity of both the model and the modeling method. Time dependence e jwt is suppressed throughout this paper.
文摘Contour integration of physical optics (P.O.) and the method of equivalent current(MEC) are used to compute and analyze the monostatic RCS and high-frequency electromgnetic scattering characteristics of coated rectangular metal plate. Both principal plane and non-principal plane are considered. For the method of equivalent current, a diffraction coefficient of impedance wedge is introduced and parallel strip models are emploved to solve the diffraction problems of non-principal plane. A good agreement is obtained between these two methods. and the results demonstrate the correctness of the methods.
