  The design of sub-arrayed phased arrays (PAs) with sub-array-only amplitude
and phase controls that afford arbitrary-shaped power patterns matching
reference ones is addressed. Such a synthesis problem is formulated in the
power pattern domain and an innovative complex-excitations clustering method,
which is based on the decomposition of the reference power pattern in a number
of elementary patterns equal to the array elements, is presented. A set of
representative results is reported to illustrate the features of the proposed
approach as well as to assess its effectiveness in comparison with benchmark
results from the state-of-the-art (SoA) excitation matching-based clustering
methods.
