Effects of current distributions on the synthesis of dipole arrays of parallel elements

The field patterns of nonuniform arrays as predicted by conventional theory may differ substantially from more accurate patterns obtained with the three-term theory that takes account of the effect of coupling on the distributions of current in the elements. Nulls in the idealized pattern are replaced by significant values, which are not independent of the length of the elements as predicted by conventional theory. Rough agreement with idealized patterns is obtained when the elements are self-resonant.