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A Pattern Reconfigurable Antenna Using Eight-Dipole Configuration for Energy Harvesting Applications.

Mohamed Aboualalaa1, Hesham A Mohamed1, Thamer A H Alghamdi2,3

  • 1Microstrip Department, Electronics Research Institute, Cairo 11843, Egypt.

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This study introduces an eight-element pattern reconfigurable antenna for energy harvesting. The antenna electronically steers its radiation pattern from 0 to 360 degrees, enhancing wireless power capture.

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RF switch matrixdipole antennaelectronically steeringenergy harvestingreconfigurable antenna

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Area of Science:

  • Electrical Engineering
  • Antenna Theory
  • Wireless Communication

Background:

  • Pattern reconfigurable antennas are crucial for efficient energy harvesting from diverse wireless sources.
  • Electronic steering of antenna radiation patterns offers flexibility in capturing energy from various directions.
  • Existing solutions may lack the comprehensive coverage or electronic control needed for optimal energy harvesting.

Purpose of the Study:

  • To propose and validate an eight-element pattern reconfigurable antenna designed for enhanced energy harvesting applications.
  • To demonstrate the electronic steerability of the antenna's radiation pattern across a full 360-degree range.
  • To investigate the antenna's performance in terms of frequency range, bandwidth, and omnidirectional capabilities.

Main Methods:

  • Design of an eight-dipole configuration with shared excitation, utilizing baluns with grounded and open-circuit stubs.
  • Implementation of an RF switch matrix for electronic control of the radiation pattern steering.
  • Numerical simulations and experimental validation of the antenna's reflection coefficient and radiation characteristics.

Main Results:

  • The proposed antenna operates within the 4.17 to 4.5 GHz frequency range, achieving a 7.6% impedance bandwidth.
  • Electronic steering of the radiation pattern is achieved across a 0 to 360-degree range with 45-degree steps.
  • The antenna exhibits omnidirectional operation when all elements are simultaneously active, validated by good agreement between simulated and experimental data.

Conclusions:

  • The developed pattern reconfigurable antenna effectively enables electronic steering for improved energy harvesting.
  • The design demonstrates versatile radiation pattern control, including omnidirectional capabilities.
  • The findings support the potential of this reconfigurable antenna for next-generation wireless power transfer systems.