Abstract:
In this work, synthesis of the linear array geometry is put forward as a constrained
vector optimization problem whose components are to meet the minimum sidelobe level
(SLL) and control of the wide/narrow null placement during beam scanning. Since these
synthesis objectives generally conflict with each other, non-dominated solutions are
searched using the Non-Dominated Sorting Genetic Algorithm- II (NSGA-II). Then, the
Pareto frontiers are obtained using these trade-off solution sets between the maximum
SLL, null control and scanning range to provide a view of all design options. Thus, the
pattern features resulted from these Pareto frontiers are valid for any chosen main beam
direction within its full prescribed beam scanning range. Finally, some typical Pareto
optimal radiation patterns of the scanning arrays are synthesized with only perturbating
the positions of the array elements and their full electromagnetic wave simulations are
also completed to examine the resulted mutual coupling effects between the elements of
the arrays.