Agile microwave WPT exploiting circular array with optimized time-modulated excitations

This work focuses on the practical realization of a time-modulated array intended as wireless power transmitter. In fact, the simultaneous need for high gain radiators and a control network makes these array typically almost impractical. The exploitation of a radial spoke-arranged array with 15 dBi of gain @2.45 GHz and only 8 input ports gives the opportunity to realize a cheap control unit for the radio-frequency feeding signals time modulation. The preliminary test of the realized board and its impact on the multi-harmonic radiation of the array is provided. As a further requirement for the practical use of such a power source, an AI-based optimization strategy is also adopted for almost real-time reconfiguration in realistic dynamic operating scenarios.