Uniform PO and PTD solution for calculating plane wave backscattering from a finite cylindrical shell of arbitrary cross section

The plane wave backscattering from a perfectly conducting three-dimensional shell of arbitrary cross section has peen studied. A uniform physical optics (PO) solution, valid across the reflection limits, is derived. The solution, derived from an asymptotic evaluation of the PO integral, includes end-point contributions that account for the diffracted field on edges. It can be improved by the fringe fields derived from an analytical integration of the equivalent edge currents of the physical theory of diffraction (PTD). It is computationally efficient for electrically large shells and compares very well with the finite-element method