Fast full wave analysis of a cylindrical antenna using a single integral with an exact kernel

This paper presents a fast approach in the method of moments (MoM) analysis so as to obtain the non-uniform current distributions of cylindrical antennas with electrically large radii. An oblique incident field in its general form and a delta-gap source are considered in the formulation of non-uniform current distributions. In the Galerkin´s MoM procedure, the Fourier cosine series is considered as the entire domain basis function series. In this formulation, the kernel is represented by a series of weighted spherical Hankel functions of the second kind and the convergence of this series is fast. As a result, the computation time is short. The Mathematica package is used to obtain and plot the current distributions along the cylindrical antennas.