The design of high efficient resonator using multiple reactive loadings for wireless power transfers

In recent several years, the techniques of wireless power transfer (WPT) have been researched for various charging applications such as smart phones, consumer electronics, and even electric vehicles, especially since the paper of WPT through magnetic resonance coupling was published by Prof. Soljacic at MIT in 2007. From the point of view of magnetic resonance coupling theory, both the quality factors of transmitter and receiver resonators should be high enough to realize high efficient WPT, and the coupling coefficients between the resonators should be high as well. However, it is difficult to implement high efficient WPT resonators surrounded by metallic components within the limited space in the compact multi-function applications. This paper presents a novel technique to design high efficient resonators using multiple reactive loadings for WPTs.