A CMOS RF-to-DC Power Converter With 86% Efficiency and -19.2-dBm Sensitivity
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
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AbstractThis paper proposes an RF-to-dc power converter for ambient wireless powering that is efficient, highly sensitive, and less dependent on the load resistance with an extended dynamic range. The proposed rectifier utilizes a variable biasing technique to control the conduction of the rectifying transistors selectively, hence minimizing the leakage current; unlike the prior work that has a fixed feedback resistors, which limits the efficient operation to a relatively high RF power and causes a drop in the peak power conversion efficiency (PCE). The proposed design is fabricated using a 0.18-μm standard CMOS technology and occupies an area of 8800 μm². The measurement results show an 86% PCE and -19.2-dBm (12 μW) sensitivity when operating at the medical band 433 MHz with a 100-kΩ load. Furthermore, the PCE is 66%, and the sensitivity is -18.2 dBm (15.1 μW) when operating at UHF 900 MHz with a 100-kΩ load.
CitationAlmansouri AS, Ouda MH, Salama KN (2018) A CMOS RF-to-DC Power Converter With 86% Efficiency and -19.2-dBm Sensitivity. IEEE Transactions on Microwave Theory and Techniques: 1–7. Available: http://dx.doi.org/10.1109/TMTT.2017.2785251.