SCATTERING FROM AN IMPEDANCE CYLINDER EMBEDDED IN A NONCONCENTRIC DIELECTRIC CYLINDER

The electromagnetic scattering from an impedence cylinder embedded in a nonconcentric dielectric cylinder is derived rigorously by using a boundary value approach. The two cylinders are assumed to be infinite in length and of circular cross-section. The incident electromagnetic field is in terms of an electric or a magnetic field component parellel to both cylinder axes. The problem is two dimensional and the solution to either types of polarisation (TM or TE) can be found independently. Plane wave and line source excitations are considered in this analysis. The effects of various geometrical and electrical parameters (such as the cylinder's radii, permittivity, surface impedance and eccentricity) on the near field distribution and the far scattered field pattern are examined. Bistatic and monostatic scattering cross-sections of the composite cylinder which minimise or maximise the radar cross-section are also investigated.