Experimental Study of Scattering of Electromagnetic Waves by Radially Inhomogeneous Cylinders

Abstract

Scattering by radially inhomogeneous isotropic cylinders was investigated experimentally in the case of parallel polarization. The cylinders used were constructed of a type of artificial dielectric which made the simulation of a smooth permittivity variation possible. The measurements were carried out in a parallel-plate region for both plane- and cylindrical-wave incidence. The scattered-field coefficients were computed from measured field values by applying a Fourier least-squares fit. The scattered field and back-scattering cross-section computed using these coefficients were compared with those expected from theory.