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<p>This study introduces a novel 4-port Multi-Input Multi-Output Defected Ground Structured (MIMO-DGS) antenna designed for future Wi-Fi 6E applications. A basic quarter-wavelength radiating arm with circular patch is fabricated on an FR4 substrate with thickness of 0.8&#xa0;mm is made to resonate throughout the frequency range of 5.1–7.2&#xa0;GHz, with an impedance bandwidth of −10&#xa0;dB. By using a partly rectangular ground plane, a significant improvement in impedance matching is obtained. Moreover, the isolation between the antenna components is attained to a level above 15&#xa0;dB over the whole operational frequency range. Furthermore, the correlation coefficient in the target band is below 0.02. The radiation patterns of the constructed antenna closely align with the predicted results, as shown by the measurements. A significant increase in diversity was obtained, with a diversity gain of up to 9.99&#xa0;dB over the target spectrum. Furthermore, the reduction in channel capacity is acceptable, at a rate of less than 0.4 bits per second per Hertz. It is feasible to achieve high performance in terms of both efficiency and variety. These data suggest that the antenna system has the potential to be used on next generation Wi-Fi devices.</p>

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Design and analysis of a DGS-MIMO antenna for Wi-Fi 5/6/6E applications

  • 期刊论文

  • 发表日期：

    2026年5月13日

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  • M. Amina Begum,
  • T. Yuvaraj,
  • R. Krishnamoorthy

摘要

This study introduces a novel 4-port Multi-Input Multi-Output Defected Ground Structured (MIMO-DGS) antenna designed for future Wi-Fi 6E applications. A basic quarter-wavelength radiating arm with circular patch is fabricated on an FR4 substrate with thickness of 0.8 mm is made to resonate throughout the frequency range of 5.1–7.2 GHz, with an impedance bandwidth of −10 dB. By using a partly rectangular ground plane, a significant improvement in impedance matching is obtained. Moreover, the isolation between the antenna components is attained to a level above 15 dB over the whole operational frequency range. Furthermore, the correlation coefficient in the target band is below 0.02. The radiation patterns of the constructed antenna closely align with the predicted results, as shown by the measurements. A significant increase in diversity was obtained, with a diversity gain of up to 9.99 dB over the target spectrum. Furthermore, the reduction in channel capacity is acceptable, at a rate of less than 0.4 bits per second per Hertz. It is feasible to achieve high performance in terms of both efficiency and variety. These data suggest that the antenna system has the potential to be used on next generation Wi-Fi devices.