An Unusually Simple Technique for Sidelobe Reduction

The technique presented here consists of superposing three constant amplitude current excitations on a uniformly spaced array. The first one has constant phase and the other two have equal progressive phase but of opposite signs. The amplitude as well as the progressive phase are chosen in such a way that a high degree of sidelobe reduction is achieved. Results are comparable to those of Chebyshev arrays with the advantage that the current distribution is much simpler to compute. Because of this simplicity the designer can much more easily guess what corrections to introduce in the array excitation in case the measured patterns do not agree with the computed ones.