CIRCUMFERENTIAL VARIATION OF THE AXIAL COMPONENT OF CURRENT IN CLOSELY SPACED THIN-WIRE ANTENNAS

Closely spaced thin-wire antennas are analyzed by the moment method using the piecewise-sinusoidal function to describe the current variation along the length of the wire and a Fourier series for the circumferential variation. Data are presented for the circumferential variation of the surface current density of parallel dipoles obtained by the “thin-wire’ theory, wire-grid model, and the present formulation. It is found that there is substantial circumferential variation, even for dioples spaced more than several wire diameters. Copyright © 1979 by The Institute of Electrical and Electronics Engineers, Inc.