Antenna beamwidth control using parasitic subarrays

A new and effective technique of controlling the azimuth pattern of a singly or dually polarized linear antenna array is presented. It is shown that the use of parasitic elements allows us to control the azimuth beamwidth over a wide range. It is noted that this technique could be applied to other linear arrays, using other radiating elements. The analysis of coupling between fed and parasitic elements is specific to the type of element that is used, but the overall approach would still be useful