RF Energy Harvesting Systems

Le résumé fourni par la source

Energy harvesting is gaining attention for its ability to capture environmental energy and transform it into usable power, extending battery life. This thesis explores RF energy harvesting methods for powering low-energy IoT devices, wireless sensor nodes, and RFID, focusing on GSM and Wi-Fi bands. With the rise of compact low-power devices, sustainable powering methods are crucial. The research investigates rectennas, which receive RF energy and convert it for storage. The thesis comprises four sections, beginning with RF mapping to assess available ambient RF power. The second part explores multiport antenna designs that combine power from each antenna to enhance efficiency. Dual-band antennas mounted on six faces of a cube enable omnidirectional power reception, improving PCE. The rectenna uses a cost-effective FR4 substrate. The study develops single-band, dual-band, and wideband rectifiers to boost efficiency. Impedance matching circuits with radial stubs provide broad bandwidth matching. The Greinacher rectifier circuit achieves the desired DC power output for low incident power, though increasing stages improves voltage at the cost of PCE. The wideband rectifier maintains consistent efficiency across frequency and input power variations. The research advances wireless energy harvesting through innovative wideband rectifier designs and multiport antennas.

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