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Optimization of Reactively Loaded Reflectarrays via Semidefinite Relaxation

The versatile semidefinite relaxation-based optimization framework developed for near-field wireless power transfer (WPT) systems is adopted for optimization of scanned reflectarrays in the far-field. As confirmed via simulation results, the framework can be used to maximize gain by finding the optimum loading element for each antenna element. The procedure is straightforward and can also be useful for design and optimization of reconfigurable reflect- and lens arrays.