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On 22 November, results of the prestigious science competition Czech Head were announced. Ing. Jan Kraček, Ph.D. from the Department of Electromagnetic Field of Faculty of Electrical Engineering, earned the CEZ Group’s Doctorandus Price for technical sciences field. The professional jury was intrigued by his doctoral thesis on the technology of wireless power.

The main contribution of Dr. Kraček´s dissertation is an innovative concept of wireless power technology, combining approach of the electrical circuits theory which allows you to define general optimizable and measurable characteristics of transmission chains for wireless power, together with approach of the electromagnetic field theory, which binds characteristics with geometrical  and material properties of electromagnetic structures in wireless power supply.

The idea of wireless power has been around since the late 19th century, when it was mostly studied by Nikola Tesla on an experimental basis. In the following century, however, this idea was developed very little. New wave of interest raised in the beginning of the 21st century, especially due to the increasing number of autonomous mobile electrical devices equipped with batteries that must be periodically recharged or replaced. Charging and replacement of batteries may be inconvenient or unfeasable because of the different kinds of chargers for different devices, complicated access and robustness. Wireless power technology allows you to charge devices without wired connection. In this case, a unified platform for charging a variety of different devices may be then introduced as a standard equipment in buildings. Devices with low power consumption can thus be stripped of batteries completely, powered wirelessly.