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Efficient Multi-Hop Wireless Power Transfer for the Indoor Environment.

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Summary
This summary is machine-generated.

This study enhances wireless power transfer (WPT) efficiency for the Internet of Things (IoT) using a multi-hop approach. This method boosts received power at end sensor nodes, improving autonomous device operation.

Keywords:
RF-DC conversion efficiencyinternet of thingsmulti-hopwireless power transferwireless senor networks

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Area of Science:

  • Electrical Engineering
  • Wireless Communication Systems
  • Sensor Networks

Background:

  • The proliferation of Internet of Things (IoT) and wireless sensor networks (WSN) necessitates efficient wireless powering solutions for autonomous devices.
  • Existing wireless power transfer (WPT) methods face efficiency challenges, particularly for low-power autonomous systems.
  • Advancements in wireless communication technologies offer potential solutions for improving WPT.

Purpose of the Study:

  • To investigate the efficacy of a multi-hop (MH) concept for enhancing wireless power transfer (WPT) efficiency.
  • To increase the received power at the end sensor node (ESN) in wireless sensor networks (WSN).
  • To explore the application of signal amplification techniques within a multi-hop WPT framework.

Main Methods:

  • Developed and fabricated a multi-hop node (MHN) prototype for WPT.
  • Conducted experimental measurements and power transfer modeling in the sub-GHz frequency range.
  • Evaluated WPT performance in both line-of-sight (LoS) and non-line-of-sight (NLoS) scenarios, including a 90-degree turn-on angle for NLoS.
  • Proposed an efficient simulation approach for analyzing MH WPT technology and sensor node distribution.

Main Results:

  • Demonstrated a functional multi-hop node (MHN) prototype through laboratory experiments.
  • Measured received power and RF-DC converted voltage at the end sensor node (ESN) under various conditions.
  • Validated the potential of the multi-hop WPT concept to improve power delivery efficiency.
  • Showcased the utility of the simulation approach for optimizing wireless sensor node placement.

Conclusions:

  • The multi-hop (MH) WPT strategy, leveraging signal amplification, effectively enhances power delivery to end sensor nodes (ESN).
  • Experimental validation confirms the feasibility and benefits of MH WPT in both LoS and NLoS environments.
  • The proposed simulation method provides a valuable tool for optimizing spatial distribution of wireless sensor nodes for improved WPT efficiency.