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<p>This manuscript presents graphene-based, triple-band, quad-port frequency tunable MIMO antenna for THz applications. The proposed graphene antenna is built on silicon substrate of size 0.06λ × 0.083λ&#xa0;μm<sup>2</sup> (λ is free space wavelength corresponds to lowest frequency of 0.16&#xa0;THz), which provides resonance at 0.16&#xa0;THz, 0.71&#xa0;THz and 1.45&#xa0;THz. In this article, graphene material property is analysed using Kubo’s relation. The single antenna element uses T-shaped patch with multiple slots and defective ground structure to achieve triple bands. The operating bandwidth for band-1, band-2 and band-3 lies from 0.12 to 0.22&#xa0;THz, 0.64 to 0.77&#xa0;THz and 1.39 to1.5&#xa0;THz, respectively. The bandwidth of the antenna is reconfigured by varying the graphene chemical potential. The inter-element isolation of − 30&#xa0;dB is achieved over the entire operating bands. The MIMO performance metrics of 2 × 2 MIMO in terms of Envelope Correlation Coefficient (ECC) of &lt; 0.0001, ~ 10&#xa0;dB Diversity Gain (DG), less than − 10&#xa0;dB Total Active Reflection Coefficient (TARC) and &lt; 0.4bits/s/Hz Channel Capacity Loss (CCL) are evaluated, and the findings are compared with the standard values. The simulated outcomes show that the quad-port MIMO architecture is a good option for terahertz applications.</p>

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Triple-Band Quad-Port Highly Isolated MIMO Antenna for THz Applications with Frequency-Agile Characteristics

  • 期刊论文

  • 发表日期：

    2025年7月31日

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  • Aditya Srivastava,
  • Durai Pandurangan,
  • Naveen Mishra

摘要

This manuscript presents graphene-based, triple-band, quad-port frequency tunable MIMO antenna for THz applications. The proposed graphene antenna is built on silicon substrate of size 0.06λ × 0.083λ μm2 (λ is free space wavelength corresponds to lowest frequency of 0.16 THz), which provides resonance at 0.16 THz, 0.71 THz and 1.45 THz. In this article, graphene material property is analysed using Kubo’s relation. The single antenna element uses T-shaped patch with multiple slots and defective ground structure to achieve triple bands. The operating bandwidth for band-1, band-2 and band-3 lies from 0.12 to 0.22 THz, 0.64 to 0.77 THz and 1.39 to1.5 THz, respectively. The bandwidth of the antenna is reconfigured by varying the graphene chemical potential. The inter-element isolation of − 30 dB is achieved over the entire operating bands. The MIMO performance metrics of 2 × 2 MIMO in terms of Envelope Correlation Coefficient (ECC) of < 0.0001, ~ 10 dB Diversity Gain (DG), less than − 10 dB Total Active Reflection Coefficient (TARC) and < 0.4bits/s/Hz Channel Capacity Loss (CCL) are evaluated, and the findings are compared with the standard values. The simulated outcomes show that the quad-port MIMO architecture is a good option for terahertz applications.