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<p>This scholarly article examines a tetra-element multiple-input multiple-output (MIMO) antenna characterized by a defected substrate and a defected ground, fine-tuned for fifth-generation millimeter-wave applications. The implementation of an asymmetric feeding mechanism, in conjunction with dual chamfers angled at + 45° and − 45°, facilitates the antenna’s resonance at two designated frequency spectra, namely 28&#xa0;GHz and 38&#xa0;GHz. The defected ground structure along with corner notches exhibits enhanced isolation levels of 40&#xa0;dB and 41&#xa0;dB, alongside gain values of 8.9 dBi and 8.6 dBi, respectively. The orthogonal polarization diversity inherent in the four-element MIMO configuration significantly enhances isolation levels, culminating in a robust correlation between the simulated and measured outcomes.</p>

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Serpent-Configured Quad-Port MIMO Antenna with Dual-Band Operation and Defected Substrate-Ground Structure for Millimeter-Wave Systems

  • 期刊论文

  • 发表日期：

    2025年6月25日

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  • Bhaskara Rao Perli,
  • Tathababu Addepalli,
  • G. Divya,
  • M. Kishore Kumar,
  • Manish Sharma,
  • C. Raju,
  • Ahmed J. A. Al-Gburi

摘要

This scholarly article examines a tetra-element multiple-input multiple-output (MIMO) antenna characterized by a defected substrate and a defected ground, fine-tuned for fifth-generation millimeter-wave applications. The implementation of an asymmetric feeding mechanism, in conjunction with dual chamfers angled at + 45° and − 45°, facilitates the antenna’s resonance at two designated frequency spectra, namely 28 GHz and 38 GHz. The defected ground structure along with corner notches exhibits enhanced isolation levels of 40 dB and 41 dB, alongside gain values of 8.9 dBi and 8.6 dBi, respectively. The orthogonal polarization diversity inherent in the four-element MIMO configuration significantly enhances isolation levels, culminating in a robust correlation between the simulated and measured outcomes.