A Comparison Between Different Approaches to Wireless Power Transfer

The equivalence and differences between a set of known approaches to efficient Wireless Power Transfer are explored analytically. Synthesis methods for transmitting arrays intended to wirelessly feed a receiving device can be found in the scientific literature under different framworks such as Near-Field Focusing, microwave device design or MIMO communications. However, those apparently different approaches result in equal or at least very close solutions. In this communication, the advantages, drawbacks and equivalences of those approaches are analyzed, and some simulations are carried out to support the conclusions. Some interesting future research lines are also highlighted.