many WPT applications. This paper presents a method for designing a high efficiency WPT
system when restrictions are imposed on receiver coil (Rx) size. The optimum pitch of the
transmitter (Tx) and Rx coils is evaluated by analyzing the coil quality factor and coupling
coefficient. Empirical formulae are proposed to derive generalized design guidelines for a
given Rx size. The proposed empirical approach can be directly used for the design of a …