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JEET, Vol. 13, No. 6, November 2018
An Injection-Locked Based Voltage Boost-up Rectifier for Wireless RF Power Harvesting Applications
Jun-Seok Park
Area C - Electrophysics and Applications
Abstract This paper presents a radio frequency-to-direct current (RF-to-DC) converter for special RF power harvesting application at 915 MHz. The major featured components of the proposed RF-to- DC converter is the combination of a cross-coupled rectifier and an active diode: first, the crosscoupled rectifier boosts the input voltage to desired level, and an active diode blocks the reverse current, respectively. A prototype was implemented using 0.18 m CMOS technology, and the performance was proven from the fact that the targeted RF harvesting systems full-operation with higher power efficiency; even if the systems input power gets lower (e.g., from nominal 0 to min. -12 dBm), the proposed RF-to-DC converter constantly provides 1.47 V, which is exactly the voltage level to drive follow up system components like DC-to-DC converter and so on. And, maximum power conversion efficiency is 82 % calculated from the 0 dBm input power, 2.3 mA load current.
Keyword Cross-coupled rectifier,LC tank,Active diode,Power harvesting system,RF-to-DC converter.
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