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 nonuniform 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 nonuniform 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 the result, the computation time is short. The Mathematica package is used to obtain and plot the current distributions along the cylindrical antennas.