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Compact Wearable Antenna with Metasurface for Millimeter-Wave Radar Applications.

María Elena de Cos Gómez1, Humberto Fernández Álvarez1, Alicia Flórez Berdasco1

  • 1TSC, Electrical Engineering Department, University of Oviedo, 33203 Gijón, Spain.

Materials (Basel, Switzerland)
|April 13, 2023
PubMed
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Metasurfaces combined with an antenna array improve millimeter-wave imaging performance. This antenna system enhances gain and bandwidth for collision avoidance systems aiding visually impaired individuals.

Area of Science:

  • Electromagnetics and Applied Physics
  • Antenna Engineering
  • Metamaterial Applications

Background:

  • Millimeter-wave imaging systems require high performance for applications like collision avoidance.
  • Metasurfaces offer a promising approach to enhance antenna characteristics.
  • Existing antenna designs may face limitations in gain, efficiency, and side lobe reduction.

Purpose of the Study:

  • To design and evaluate metasurface (MTS) integrated antenna arrays for millimeter-wave imaging.
  • To improve antenna performance metrics such as gain, radiation efficiency, and front-to-back ratio (FTBR).
  • To assess the suitability of the developed MTS-antenna system for collision avoidance applications.

Main Methods:

  • Design of three metasurfaces (MTS) for integration with a series end-fed 1x10 array antenna.
Keywords:
array antennacollision avoidanceimagingmetasurfacemillimeter waveradar antennawearable

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  • Utilizing a modified Dolph-Chebyshev distribution for the antenna array.
  • Simulations and analysis focused on the 24.05-24.25 GHz frequency range.

    • Main Results:

    • The MTS-array combination achieved a reduction in secondary lobes and an increase in FTBR.
    • Gain, radiation efficiency, side lobe level (SLL), and overall device size were preserved.
    • Single-layer MTS-array combinations demonstrated widened operational bandwidth with enhanced gain and radiation efficiency.
    • The overall device dimensions are 86.8 × 12 × 0.762 mm³.

    Conclusions:

    • Metasurface integration effectively enhances millimeter-wave antenna array performance for imaging.
    • The developed compact MTS-antenna system shows significant improvements in key parameters.
    • This technology holds potential for advanced collision avoidance systems, particularly for the visually impaired.