The rapid growth of the internet of things ecosystem is constrained by the challenge of powering distributed sensor modules. Research has shown that attempts to harvest energy from standard Wi-Fi traffic are hindered by the low duty cycle of the useful signal, a consequence of the protocol’s random medium access mechanisms. To address this, the article proposes a two-stage approach. The first component is a software-reconfigurable transmitter based on the ESP32-S3 platform, designed to generate continuous-wave emission in the 2.4 GHz (ISM) band – an optimal choice for wireless power transfer. The second component is a multi-channel rectifying antenna (rectenna) featuring a controllable radiation pattern; beam switching is achieved using an ADG902 RF switch, while two patch antennas are arranged with orthogonal polarization. Experimental data confirm the effectiveness of the proposed solutions.

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