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An Injection-Locked Based Voltage Boost-up Rectifier for Wireless RF Power Harvesting Applications

  • Lee, Ji-Hoon (Dept. of Electrical Engineering, Kookmin University) ;
  • Jung, Won-Jae (Kookmin University Micro-wave Integrated Circuit Research Center) ;
  • Park, Jun-Seok (Dept. of Electrical Engineering, Kookmin University)
  • Received : 2018.04.30
  • Accepted : 2018.08.19
  • Published : 2018.11.01

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 cross-coupled rectifier boosts the input voltage to desired level, and an active diode blocks the reverse current, respectively. A prototype was implemented using $0.18{\mu}m$ CMOS technology, and the performance was proven from the fact that the targeted RF harvesting system's full-operation with higher power efficiency; even if the system's 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.

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

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