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<p>The development and evolution of a millimetre-wave multiple-input/multiple-output (MIMO) dielectric antenna are presented in this paper. Within the operative band, circularly polarized waves are produced by a well-designed feed plan. Low coupling is achieved by putting the antenna terminals anti-parallel and achieving coupling below −25&#xa0;dB. A 1 × 2 array configuration improves the gain value to around 8.9 dBi. Irregular placement of the antenna terminals tilts their radiation patterns in opposite directions. The antenna was designed to operate in the simulated band of 31.2–33.55&#xa0;GHz, and measurements confirmed an operational bandwidth (−10&#xa0;dB impedance bandwidth) of 31.2–33.6&#xa0;GHz. Favourable MIMO diversity factors and observed directive patterns show that the proposed architecture is appropriate for future 5G/6G deployments in the millimetre-wave regime.</p>

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Dual-Port Circularly Polarized Al2O3 -Based Dielectric Array Antenna with High Isolation and Pattern Diversity Feature in Millimetre-Wave Spectrum

  • 期刊论文

  • 发表日期：

    2026年1月4日

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  • Shivani Anand,
  • Gagandeep Bharti,
  • Chandan

摘要

The development and evolution of a millimetre-wave multiple-input/multiple-output (MIMO) dielectric antenna are presented in this paper. Within the operative band, circularly polarized waves are produced by a well-designed feed plan. Low coupling is achieved by putting the antenna terminals anti-parallel and achieving coupling below −25 dB. A 1 × 2 array configuration improves the gain value to around 8.9 dBi. Irregular placement of the antenna terminals tilts their radiation patterns in opposite directions. The antenna was designed to operate in the simulated band of 31.2–33.55 GHz, and measurements confirmed an operational bandwidth (−10 dB impedance bandwidth) of 31.2–33.6 GHz. Favourable MIMO diversity factors and observed directive patterns show that the proposed architecture is appropriate for future 5G/6G deployments in the millimetre-wave regime.