Scattering of Electromagnetic Waves from a Deeply Buried Circular Cylinder

Abstract

Utilizing an approximate induced current distribution, the far-zone scattered fields from a perfectly conducting, circular cylinder, which is deeply buried in a dielectric half-space are evaluated. Interpretation of these scattered fields is presented in terms of ray optics. Important scattering parameters, i.e., far-zone field patterns, 3dB beamwidth, scattering width and total scattered power are evaluated. It is found that monostatic scattering width of circular cylinder, which is deeply buried in a dielectric half-space configuration, is related to monostatic scattering width of circular cylinder in a homogeneous medium via dielectric constant times the fourth power of Fresnel transmission coefficient. Behaviour of the total scattered power as a function of depth is found to be oscillatory around a mean value which is the total power scattered from a cylinder in homogeneous medium.