Dependence of adaptive array performance on conventional array design

A direct relationship between conventional array design and the array performance in an adaptive mode is given. It is shown that the basic goals of conventional array design such as low sidelobes and narrow beamwidth have a direct effect on the adaptive array performance and should not be ignored. Expressions are obtained showing that the output signal-to-interference-plus-noise ratio (SINR) of an adaptive array is related to the conventional pattern of the array. These expressions allow the prediction of the performance of an array in its adaptive mode given its conventional electromagnetic characteristics. Thus, they are an important design tool for adaptive arrays. The relations between the conventional and adaptive array are illustrated for linear and circular arrays.