Experimental Analysis of Chirp Waveforms for Wireless Power Transfer

In this paper, we present an experimental analysis of far-field wireless power transfer (WPT) using radio frequency (RF) signals. The dual capability of RF signals for power and information transfer drives the integration of WPT and communication systems. The objective is to experimentally validate different waveforms intended for WPT and compare their performance concerning separation distance, transmit power, and output voltage. The experimental analysis conducted involves single and superimposed chirp waveforms, utilizing real-time data for a comparative analysis with conventional fixed-frequency waveforms. Our experimental findings indicate that chirp waveforms significantly enhance the harvested energy, extending the operational range of WPT compared to well-established fixedfrequency waveforms.