Winding coils are key elements in the design and the implementation of an effective wireless power charging platform for wireless devices such as mobile phones, smart phones and tablet computers. Planar winding inductors are lowcost, ready to integrate with the electronics and fully compatible with a general printed circuit board (PCB) manufacturing process. This paper addresses the design and the simulation of the planar winding inductors in order to overcome some drawbacks of such structures concerning mainly the quality factor and the resistive/thermal losses.Index Terms -wireless power transfer, inductive antennas, charging platform, printed winding inductors.

This article presents a modeling and parametric investigation of printed circuit board (PCB) coils used in inductive power charging systems by using intensive full-wave electromagnetic simulations. Low frequencies applications (below 1 MHz) are targeted. The proposed modeling approach and design methodology are validated for wireless power transfer systems including transmitting (Tx) and receiving (Rx) coils. The impact of ferrite materials used for shielding and efficiency improvement is also analyzed. Optimized PCB coils allowing a theoretical efficiency of 88.7% at 100 kHz and 98.5% at 1 MHz confirms that PCB coils are appropriate for wireless power transfer at such frequencies.

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With more than 230 products on st estimation of 100 million wireless power devi (IHS source), the wireless power market is Moreover, current smartphones are us applications (music streaming, satellite navigat NFC virtual key for car sharing) and thus a supply system is required. This paper addre modeling and characterization of this power so Power Transfer context by an original mod good correlation between measurement a obtained both for electrical (e.g. input imped and electromagnetic (e.g. magnetic field) qu simulations performed on commercial softwar simulation/measurement shows a difference o active power available on the load and the m the magnetic field corroborates with the measu Index Terms -Wireless power transfer, i electromagnetic modeling, electronic ci automotive systems, power budget I.