Elevation steering of the pattern of a vertical array of vertically polarized elements over a ground screen

Patterns of vertically polarized elements above circular finite ground screens directly on soil were computed, using equations obtained recently by Wait [1]. The applicability of a steering illumination, considered optimum for an array above a perfect ground of infinite extent to the ground screen case, was investigated. It was found that this illumination gives very good results even for a modest ground screen ( ) in the region above 3 dB beamwidth of the aperture, consisting of the elements and the images.