Simple method for analysis of dielectric-coated wire antennas

A simple method is presented for analysis of wire antennas assembled from arbitrarily interconnected straight-wire segments, which are completely or partially covered with a dielectric coating. The thickness of the coating is assumed to be not larger than about the radius of the wire, and its relative permittivity not larger than 10. The method is based on the so-called two-potential integro-differential equation combined with polynomial approximation of current. Numerical results are found to be in very good agreement with experiments.