A GALERKIN MOMENT METHOD FOR THE ANALYSIS OF AN INSULATED ANTENNA IN A DISSIPATIVE DIELECTRIC MEDIUM

A Galerkin moment method is employed to solve the problem of a dielect ric-coated dipole antenna in a dissipative medium. Piecewise sinusoids are used as basis and testing functions. The dielectric coating is mo deled by equivalent-volume polarization currents, which are simply rel ated to the conduction current distribution, No additional unknowns ar e introduced, and the size of the moment-method matrix is the same as that for bare antennas. Exact and approximate formulas for the near el ectric field are derived. The computed results exhibit excellent agree ment with those previously published for a symmetric, as well as an as ymmetric insulated dipole, Compared to its existing competitors, the m ethod appears to be more general and computationally efficient.