Tailize C. De-Oliveira, A. Girardi, P. D. de Aguirre, Lucas Compassi-Severo
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A 915-MHz RF-EH with Varactor-Based Adaptive Impedance Matching for ULV Batteryless Devices
Harvesting energy from RF signals is a relevant strategy to power ultra-low voltage (ULV) devices. This article presents an RF-EH system with a varactor-based adaptive impedance matching approach to improve the energy conversion from RF-EH to devices without battery. The proposed circuit was designed on a 65-nm CMOS process and is able to generate a stable supply voltage of 0.4 V from a frequency of 915 MHz while reaching a sensitivity of −18.7 dBm and power conversion efficiency of 58.5% in the target operation.
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