A RECONFIGURABLE ANTENNA FOR ENHANCING THE MAGNETIC COUPLING IN WPT

Abstract : IPT (Inductive Power Transfer) is an approach based on magnetic coupling to realize a wireless power transfer (WPT) system. In applications using IPT as a mean for transferring power, like RFID, it is of great interest to have a free positioning system, meaning with fewer constraints on relative positioning and orientation between the sender and the receiver. One of the problems which face the free positioning WPT by using IPT is the great sensitivity of the system to lateral and orientational misalignment between the sender and the receiver of power. This could hugely reduce the efficiency of the whole system for certain lateral and orientational misalignments, resulting in null points for the coupling coefficient, therefore no power transfer or no detection in case of RFID. In this work, we propose a reconfigurable antenna which changes its structure by turning on and off specific parts of itself. This will guarantee the effective power transfer in the range of interest, regardless of the lateral and orientational misalignments between the sender and the receiver. The same system can be used to increase the RFID read range by steering the magnetic field in certain direction. In general, the steering of the magnetic field could be used to achieve more efficient power transfer.
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A Sinayyid Jaafar, Hakim Takhedmit, Patrick Poulichet, Marjorie Grzeskowiak, Antoine Diet, et al.. A RECONFIGURABLE ANTENNA FOR ENHANCING THE MAGNETIC COUPLING IN WPT. Wireless Power Week 2019 (WPW2019 ), Jun 2019, London, France. ⟨hal-02430795⟩

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