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Analysis on Power Transfer Efficiency Using Near Field Plates

Abstract:

Two wireless power transfer system using Near Field Plates (NFP) loop antennas, which are designed to operate close to the ISM band between 886 and 906 MHz are proposed in this paper. It has been shown that an NFP using a set of eight loaded loops has better performances in terms of the the magnetic field and the current intensities on the receiver when compared to NFP using four loaded loops. The Wireless Power Transfer Efficiency (PTE) is examined while displacing the NFP in various positions between two coupled resonant loops in order to uncover the position that provides the highest PTE.