A new formulation of electromagnetic wave scattering using an on-surface radiation boundary condition approach

摘要: A new formulation of electromagnetic wave scattering by convex, two-dimensional conducting bodies is reported. This formulation, called the on-surface radiation condition (OSRC) approach, based upon an expansion applied directly on surface a scatterer. Past approaches involved applying at some distance from scatterer in order to achieve nearly reflection-free truncation finite-difference time-domain lattice. However, it now shown that application suitable convex can lead substantial simplification frequency-domain integral equation for scattered field, which reduced just line integral. For transverse magnetic (TM) case, integrand known explicitly. electric (TE) be easily constructed solving ordinary differential around contour. Examples are provided show OSRC yields computed near and far fields approach exact results canonical shapes such as circular cylinder, square strip. Electrical sizes examples ka = 5 10 . The may present useful alternative uniform high-frequency cylinders larger than 1 Structures with edges or corners also analyzed, although more work needed incorporate physics singular currents these discontinuities. Convex dielectric structures treated using OSRC. These will subject forthcoming paper.