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<p>This paper introduces a high-performance quad-port Multiple-Input Multiple-Output (MIMO) antenna array for wideband 5G New Radio (NR) (n258, n257, n260, and n261) applications in the millimeter-wave (mmWave) spectrum. The target antenna structure employs a 1 × 2 element array design with microstrip line feeding and includes diamond-shaped slots along with defected ground geometry (DGG) to increase bandwidth, gain, and isolation independent of complicated decoupling components. Fabricated on low-loss Rogers RT/Duroid 5880 substrate (εr = 2.2, tanδ = 0.0009), the antenna has an ultrawide operation bandwidth of 24&#xa0;GHz to 40&#xa0;GHz with a 50% fractional bandwidth. The measured results show a peak gain of 18.2 dBi and outstanding inter-element isolation of over 44 dB, confirming the potential for interference-free MIMO operation of the antenna. The design also exhibits better diversity performance with an ECC of &lt; 0.0005, diversity gain (DG) of 9.99 dB, and a CCL of &lt; 0.3 bps/Hz, affirming its use in high-capacity, low-latency 5G mmWave systems. In addition, the compact form factor of the antenna (35 × 35 × 0.254&#xa0;mm<sup>3</sup>), structural simplicity, and strong performance make it extremely suitable for integration within next-generation IoT platforms, indoor/outdoor wireless systems, and flexible mmWave-enabled communication devices. The present work aims to overcome challenging problems in the realization of wideband operation, high gain, and excellent isolation in compact MIMO configurations and presents a scalable and fabrication-friendly solution for future wireless networks.</p>

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A high isolated, high gain millimeter wave quad-port MIMO antenna array for wideband 5G new radio application

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月3日

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  • Poonam Tiwari,
  • Jayant Kumar Rai,
  • Ajay Kumar Dwivedi,
  • Vishant Gahlaut,
  • Pinku Ranjan,
  • Rakesh Chowdhury,
  • Ashish Pandey

摘要

This paper introduces a high-performance quad-port Multiple-Input Multiple-Output (MIMO) antenna array for wideband 5G New Radio (NR) (n258, n257, n260, and n261) applications in the millimeter-wave (mmWave) spectrum. The target antenna structure employs a 1 × 2 element array design with microstrip line feeding and includes diamond-shaped slots along with defected ground geometry (DGG) to increase bandwidth, gain, and isolation independent of complicated decoupling components. Fabricated on low-loss Rogers RT/Duroid 5880 substrate (εr = 2.2, tanδ = 0.0009), the antenna has an ultrawide operation bandwidth of 24 GHz to 40 GHz with a 50% fractional bandwidth. The measured results show a peak gain of 18.2 dBi and outstanding inter-element isolation of over 44 dB, confirming the potential for interference-free MIMO operation of the antenna. The design also exhibits better diversity performance with an ECC of < 0.0005, diversity gain (DG) of 9.99 dB, and a CCL of < 0.3 bps/Hz, affirming its use in high-capacity, low-latency 5G mmWave systems. In addition, the compact form factor of the antenna (35 × 35 × 0.254 mm3), structural simplicity, and strong performance make it extremely suitable for integration within next-generation IoT platforms, indoor/outdoor wireless systems, and flexible mmWave-enabled communication devices. The present work aims to overcome challenging problems in the realization of wideband operation, high gain, and excellent isolation in compact MIMO configurations and presents a scalable and fabrication-friendly solution for future wireless networks.