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A Compact Circular Rectenna for RF-Energy Harvesting at ISM Band.

Lalbabu Prashad1,2, Harish Chandra Mohanta1, Heba G Mohamed3

  • 1Department of Electronics and Communication Engineering, Centurion University of Technology and Management, Bhubaneswar 752050, India.

Micromachines
|July 8, 2023
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Summary
This summary is machine-generated.

This study presents a compact circular patch rectenna for efficient radio frequency (RF) energy harvesting at the 2.45 GHz Industrial, Scientific, and Medical (ISM) band. The developed rectenna achieves 52% RF-to-DC efficiency, ideal for powering low-power wireless sensor nodes.

Keywords:
L-section networkRF-energy harvestingrectifiervoltage doublerwireless sensor

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Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Wireless Power Transfer

Background:

  • The proliferation of low-power electronic devices necessitates efficient wireless power solutions.
  • Developing compact and effective rectennas is crucial for wirelessly energizing these devices.

Purpose of the Study:

  • To propose and validate a small, efficient rectenna for RF energy harvesting.
  • To achieve high RF-to-DC conversion efficiency at the 2.45 GHz ISM band for low-power applications.

Main Methods:

  • Design of a circular patch antenna with a partial ground plane for resonance at 2.45 GHz.
  • Integration of an L-section matching circuit and a voltage doubler for RF-to-DC conversion.
  • Fabrication and experimental validation of the proposed rectenna.

Main Results:

  • Simulated antenna resonance at 2.45 GHz with 50 Ω input impedance and 2.38 dBi gain.
  • Achieved 52% RF-to-DC transformation efficiency at 0 dBm input power.
  • Demonstrated good return loss and realized gain characteristics within the ISM band.

Conclusions:

  • The fabricated rectenna is suitable for powering low-power sensor nodes in wireless sensor applications.
  • The proposed design offers an effective solution for wireless energy harvesting at the 2.45 GHz ISM band.