Three-Dimensional Wireless Power Transfer Based on Meshed Cavity Resonator

The majority of existing cavity mode enabled wireless power transfer (WPT) is using the closed metallic walls to form a fully enclosed cavity resonator, which will cause issues such as high cost, difficult implementation, and inability to communicate with outside. To address these issues, this paper introduces a meshed cavity resonator for three-dimensional wireless power transfer. This structure made up of metallic meshes possesses the electromagnetic resonant modes, which work to the same degree as the all-metal enclosed cavity. Based on the proposed meshed cavity resonator, a three-dimensional WPT system is built with a metallic probe and a square receive coil placed inside the cavity, and the full wave EM simulations show that the wireless power can be delivered with over 70% efficiency to the receiver in the meshed cavity.