La Rosa, RobertoDemarchi, DaniloCarrara, SandroDehollain, Catherine2025-08-202025-08-202025-08-192024-03-0110.3390/chips30100032-s2.0-105012373757https://infoscience.epfl.ch/handle/20.500.14299/252994This paper presents a novel CMOS RF-to-DC converter for ultra-low-power wireless sensor nodes powered by RF wireless power transfer. The proposed converter achieves 10% higher power conversion efficiency than a conventional rectifier, with only a 1% increase in power consumption. The system employs a reconfigurable Dickson topology, operates on the unlicensed 868 MHz ISM band, and includes a built-in power-efficient MPPT system architecture. Experimental measurements show a maximum power conversion efficiency of 55% in the power range from −22 dBm to 0 dBm, with a power sensitivity of −22 dBm for a DC output voltage of 2.4 V. The proposed converter offers a promising solution for efficient wireless power transfer and energy harvesting in ultra-low-power wireless sensor nodes.trueCMOS technologymaximum power point tracking (MPPT)power conversion efficiencyRF energy harvestingRF-to-DC converterultra-low-powerwireless power transferwireless sensor nodestext::journal::journal article::research article