Theoretical methods for computing characteristics of Wullenweber antennas

A theoretical method is formulated for calculating input and mutual impedances, total field radiated, and power gain of a Wullenweber antenna above a lossy flat earth. The Wullenweber antenna considered here is essentially an array of two concentric rings of discrete elements. Each ring is placed in front of a concentric screen. The inner ring is designed to operate at 3¿10MHz, and the outer ring at 8¿32 MHz. The radiator used for the highband ring is a sleeve antenna, and that for the lowband ring is a 3-wire folded monopole. Numerical results are given as a function of frequency, ground constants, elevation and azimuth angles with a specified set of element and array dimensions.