A reconfigurable multiband radio frequency energy harvesting system with wide dynamic range.

This paper proposes a fully integrated dual-band CMOS Radio Frequency Energy Harvesting (RFEH) front-end system. The architecture features an adaptive switching between two harvesting frequencies: 1.9- and 2.4 GHz. It consists of two identical dual-band sources, each connecting to an individual circuit comprising an on-chip LC matching network, as well as main and auxiliary cross-coupled differential drive (CCDD) rectifiers. A logic control circuit compares the power levels in the auxiliary paths and determines the higher power frequency path, thus configuring the LC matching network to operate at the higher power frequency. As such, the presented system achieves a peak power conversion efficiency (PCE) of 27.89% and 30.42% at 100kΩ, respectively. [ABSTRACT FROM AUTHOR]