Optimization of Wireless Power Transfer Systems Enhanced by Passive Elements and Metasurfaces
It provides a rigorous, general optimization method for designing WPT systems with passive elements, addressing a key bottleneck in the field.
This paper introduces a convex semidefinite relaxation optimization technique for wireless power transfer systems enhanced by passive elements and metasurfaces, enabling efficient and reliable optimization to find physical performance limits and optimal parameters without relying on assumptions.
This paper presents a rigorous optimization technique for wireless power transfer (WPT) systems enhanced by passive elements, ranging from simple reflectors and intermedi- ate relays all the way to general electromagnetic guiding and focusing structures, such as metasurfaces and metamaterials. At its core is a convex semidefinite relaxation formulation of the otherwise nonconvex optimization problem, of which tightness and optimality can be confirmed by a simple test of its solutions. The resulting method is rigorous, versatile, and general -- it does not rely on any assumptions. As shown in various examples, it is able to efficiently and reliably optimize such WPT systems in order to find their physical limitations on performance, optimal operating parameters and inspect their working principles, even for a large number of active transmitters and passive elements.