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Pattern Reconfigurable UHF RFID Reader Antenna Array.

Md Abu Saleh Tajin1, Kapil R Dandekar1

  • 1Electrical and Computer Engineering, Drexel University, Philadelphia, PA 19104, USA.

IEEE Access : Practical Innovations, Open Solutions
|February 5, 2021
PubMed
Summary
This summary is machine-generated.

This study introduces a low-cost, reconfigurable Ultra High Frequency (UHF) RFID reader antenna. This flexible antenna enhances coverage for RFID applications and enables new uses like on-body sensors and indoor localization.

Keywords:
IoT (Internet of Things)RFID (Radio Frequency Identification)UHF (Ultra High Frequency) RFIDreader antennareconfigurable antenna

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Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Antenna Theory

Background:

  • Growing interest in passive Radio Frequency Identification (RFID) devices and sensors necessitates adaptable reader antenna performance.
  • Existing RFID systems require flexible solutions for diverse applications, including emerging sensor networks and localization.

Purpose of the Study:

  • To propose a low-cost, easily fabricated, and pattern-reconfigurable Ultra High Frequency (UHF) RFID reader antenna.
  • To enhance the coverage area and versatility of RFID reader systems.

Main Methods:

  • Design and simulation of a pattern-reconfigurable UHF RFID reader antenna operating in the 902-928 MHz ISM band.
  • Electronic switching of four radiation beams in the azimuth plane.
  • Characterization of antenna bandwidth, gain, polarization (Left Hand Circularly Polarized - LHCP), and axial ratio (AR).

Main Results:

  • The proposed antenna achieves a 54 MHz bandwidth (890-944 MHz) and a maximum gain of 8.9 dBi.
  • The antenna demonstrates electronically switchable beams and LHCP with an AR ranging from 0.45 dB to 7 dB.
  • Simulation and measurement results show good agreement, with improved performance compared to a commercial antenna.

Conclusions:

  • The pattern-reconfigurable UHF RFID reader antenna offers increased coverage for conventional RFID systems.
  • This innovation facilitates new applications such as on-body RFID sensor implementation and indoor localization.