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A Compact MIMO Antenna Based on Modal Analysis for 5G Wireless Applications.

Parveez Shariff Bhadravathi Ghouse1, Deepthi Mariam John1, Pallavi R Mane1

  • 1Department of Electronics and Communication Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, India.

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Summary

This study introduces a 28 GHz MIMO antenna using a series-fed dual-element dipole array and a metasurface for improved isolation. The design enhances channel capacity and achieves over 21 dB isolation, crucial for 5G applications.

Keywords:
5GCMTMIMOdipole array antennametasurfacemillimeter wave (mmWave)

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Area of Science:

  • Electromagnetics and Antenna Design
  • Metamaterials and Metasurfaces
  • Wireless Communication Systems

Background:

  • Millimeter-wave (mmWave) frequencies, such as 28 GHz, are vital for next-generation wireless systems like 5G.
  • Improving isolation in Multiple-Input Multiple-Output (MIMO) antenna systems is critical for enhancing channel capacity and overall system performance.
  • Metasurfaces offer novel solutions for electromagnetic wave manipulation, including antenna isolation enhancement.

Purpose of the Study:

  • To present a planar, series-fed, dual-element dipole array MIMO antenna operating at 28 GHz.
  • To investigate the use of a metasurface structure for improving isolation between MIMO antenna elements.
  • To analyze the antenna's performance, including bandwidth, gain, and diversity parameters.

Main Methods:

  • Design and simulation of a series-fed, non-uniform dual-element dipole array antenna.
  • Expansion of the antenna to a three-element MIMO configuration.
  • Integration of a rectangle-shaped metasurface structure with a defected ground plane to suppress surface wave coupling.
  • Characterization of the antenna's performance, including S-parameters, radiation patterns, and diversity metrics.

Main Results:

  • The proposed MIMO antenna resonates at 28 GHz, exciting a combination of J1, J2, and J3 modes.
  • The metasurface and defected ground structure achieved isolation improvement greater than 21 dB.
  • The antenna exhibits a bandwidth of 26.7–29.6 GHz and a peak gain of 6.3 dBi.
  • Validation of antenna performance using envelope correlation coefficient, diversity gain, and channel capacity loss.

Conclusions:

  • The developed planar MIMO antenna with metasurface-based isolation effectively operates at 28 GHz.
  • The proposed isolation technique significantly suppresses surface wave coupling, enhancing MIMO performance.
  • The antenna's performance metrics demonstrate its suitability for high-frequency wireless communication applications.