Abstract
In this paper we present a new type of adaptive array antenna. The array optimizes well-known cost functionals such as mean-square error or output power, subject to strict inequality constraints on any part; or all the antenna pattern shape, e.g., controlling side-lobe levels, null placement, directional control, etc. Moreover, the adaptive algorithm determines array gains which are ’’robust’’ in the sense that the antenna pattern will satisfy the pattern shape constraints even if the array weights are implemented with error, as might occur with digitally controlled weights, for example. The antenna pattern also exhibits a robustness property against wavefront distortion, mutual coupling uncertainties, and array geometry errors. Finally, by appropriate choice of constraints the array can have a broadband capability.
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