Qi compliant wireless charger with PCB integrated magnetic material

Wireless power charging for mobile devices becomes more and more attractive, as the majority of the state-of-the-art devices offer this feature. Space sensitive applications often require ultra-low height of the charging station itself. In case of portable devices, it also needs to have less weight too. Greater number of all wireless charging stations cannot offer such feature. This paper describes a concept for ultra-thin wireless charging stations. Advanced printed circuit board design and manufacturing with PCB integrated nanocrystalline sheets helps to optimize the antenna circuit as well as the performance, while reducing the height and weight at the same time. To be comparable to standard devices available at the market, a Qi charging circuit on bottom side controls the antenna.