Effective Use of Metamaterial Slabs in Enhancing the DGS-based WPT System Performance

The effective utilization of metamaterial slabs in the defected ground structure-based wireless power transfer (WPT) system performance improvement is reported in this work. WPT is designed to operate at practical 900 MHz and has transmitting and receiving resonators with a 20-by-20 sq. mm area. Furthermore, developed WPT demonstrated the power transfer efficiency of 57% when two resonators were separated by 19 mm. The MTM slabs, with the negative permeability property, were positioned in the middle between two resonators. In this context, it is imperative to note that MTMs were constructed using two different array configurations. As a consequence, the 2×2 and 3×3 arrays resulted in the efficiency enhancement of 64% and 68%, respectively.