Magneto-Electric Dipoles for Wireless Power Transmission

Abstract

Wireless power transmission (WPT) has attracted lots of attention because it can transfer energy from the power source to the receiver without physical interconnection. As a result, it can bring convenience and safety to all users, especially when the physical interconnection is inconvenient or even hazardous. In this project, a comprehensive study about wireless power transmission (WPT) is carried out, including the development of wireless power transmission (WPT), various genres of existing techniques, recent technologies and applications. Then magneto-electric dipoles are studied and designed for the near-field wireless power transmission (WPT) system at 2.4 GHz. The performances of magneto-electric dipoles are compared with the microstrip patch antennas and the sensitivity of misalignment is also tested. The measured power transmission efficiency is 94% and 54% at 2.4GHz for the distance equal to 10mm and 50mm. The overall performance of wireless power transmission using magneto-electric dipoles is much better than using microstrip patch antennas. Then two types of circular polarized magneto-electric dipoles are proposed for the wireless power transmission (WPT) system to increase the performance, especially in the sensitivity of misalignment.