Abstract
In this paper, we present the design of a simple, compact and fully planar magnetic resonance coupled (MRC) based wireless power transfer (WPT) system. The system is designed to operate at the ISM of 2.45 GHz. In the proposed design, the transmitting (Tx) and receiving (Rx) sections are constructed with the help of identical planar source/load loop and resonating coils on the same face of the dielectric substrate. The use of planar structure eliminates the limitation of the practical applicability caused by the bulky geometry of the non-planar configurations. Further, to improve the power transfer efficiency of the proposed system, a zero-index MTM slab is placed between the Tx and Rx section. The MTM slab controls the wave directivity of the Tx element according to Snell’s law and improved the coupling between the Tx and Rx section. As a result, the efficiency of the proposed system is improved significantly. To justify the proposed approach, the prototypes are designed and experimentally verified. The experimental result confirms the feasibility of the proposed system.
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