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New battery-free technology can power devices using ambient RF signals
Ubiquitous wireless technologies like Wi-Fi, Bluetooth, and 5G rely on radio frequency (RF) signals to send and receive data. A new prototype of an energy harvesting module – developed by a team led by scientists from the National University of Singapore (NUS) – can now convert ambient or ‘waste’ RF signals into direct current (DC) volta...
A new prototype of an energy harvesting module – developed by a team led by scientists from the National University of Singapore (NUS) – can now convert ambient or ‘waste’ RF signals into direct current (DC) voltage. Prof Yang added, “For example, gigahertz Schottky diode technology has remained saturated for decades due to thermodynamic restrictions at low power, with recent efforts focused only on improving antenna efficiency and impedance-matching networks, at the expense of bigger on-chip footprints. One of the key findings is that the self-parametric effect driven by well-known VCMA in magnetic tunnel junctions-based spin-rectifiers significantly contributes to the low-power operation of SR-arrays, while also enhancing their bandwidth and rectification voltage.
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