Journal
WIRELESS POWER TRANSFER
Volume 3, Issue 1, Pages 34-42Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/wpt.2015.22
Keywords
Energy harvesting; D-TV; Efficiency; Low power; Rectifier
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In this work, a high-efficiency radio-frequency energy-harvesting system that takes use of the Portuguese Digital Television signal (750-758 MHz) to obtain DC power is proposed. To be useful, it is optimized to operate at low-power conditions. For the rectifier, three different solutions are presented: a single-series diode, a single-shunt diode, and a voltage-doubler configuration. The efficiency is similar for the three rectifiers - about 54% with a sine-wave excitation and -10.5 dBm of input power. Field measurements with the voltage-doubler have shown 63% efficiency for the same input power.
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