Sidelobe reduction using random methods for antenna arrays

Effectiveness of sidelobe reduction in linear arrays is compared for the cases of three methods which employ only one or two discrete amplitude levels. The first technique uses randomized phase reversals in an equiam-plitude antenna array, obtaining amplitude taper by employing more phase reversals towards the ends of the array, which has the element excitations of 1 or -1 only. A less flexible but perhaps more effective technique uses element excitations of 1 or 0 rather than 1 and -1. The third possibility employs two discrete amplitude levels, allowing excitations 1, C or 0.