Oblique Plane-Wave Scattering From a General Bi-Isotropic Cylindrical Shell With an Interior Advanced Composite-Material Backing

This paper presents a rigorous and efficient theoretical model for analyzing the oblique plane-wave scattering properties of a multilayered bi-isotropic cylindrical shell backed by an interior advanced composite material. The backing material considered is a graphite-fiber-reinforced plastic composite (GFRPC), which is treated as a laminated electrically anisotropic medium. In this model, a recursive eigenfunction theory is derived for describing the electromagnetic fields in the bi-isotropic layers of the cylinder, while a state-equation approach is employed for governing the fields in the anisotropic layers of the cylinder. On the basis of this model, echo widths were computed and, wherever possible, were compared with data available in the literature to validate this model. Particularly, the distinct scattering properties of obliquely incident cases are observed and discussed in detail