Wireless Power Transfer System Based on Magnetic Dipole Coupling With High Permittivity Metamaterials

In this letter, we present a new approach for the performance improvement of a wireless power transfer (WPT) system by utilizing the high permittivity property of metamaterials (MTMs). Here, fully planar structures are considered to design the transmitting (Tx) and receiving (Rx) sections of the WPT system. The performance of the proposed system is enhanced by placing the MTM slabs at both sides of the Tx and Rx elements. The high permittivity property of MTM generates a strong magnetic dipole behavior, which increases the magnetic coupling between the Tx and Rx sections. As a result, the efficiency of the proposed system is improved significantly along with the transmission distance. The lateral and angular misalignments are also studied for the presented system. Finally, the prototypes of the proposed configuration are fabricated, and measurements are performed. The measured result confirms that a considerable amount of efficiency improvement is obtained from the proposed WPT system by the virtue of MTM usage.