Numerical analysis of electromagnetic radiation properties of smooth conducting bodies of arbitrary shape

Abstract

A numerical-theoretical technique is described for determining the surface current density distribution and subsequently the near- and far-zone fields of an arbitrarily shaped perfectly conducting body excited by an arbitrary primary source. The arbitrary surface is described by dividing it into a number of connected cells which are mathematically described as quadric surfaces. The "arbitrary body" formulation is applied to two configurations; namely the radial dipole above a conducting cylinder of finite length and a quarter-wavelength monopole mounted atop the fuselage of a CH-47 helicopter. The numerical results are compared with those obtained through an experimental program as well as those obtained by alternate numerical means and good agreement is noted.