Phased array alignment by the iterative sampling method

An adaptive alignment technique for a phased array is described. This technique derives a suitable array excitation function directly from dynamic antenna pattern measurements using a fixed external source. The array requires no built-in test capability. The iterative sampling method is used to determine the excitation coefficients, but without matrix inversion. The alignment effort is further simplified by using dynamic rather than static pattern measurements. The technique can be used not only to implement standard array tapers but also to implement antenna patterns with deep nulls in specified directions.<>