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<p>The design and investigation of a two-terminal dielectric radiator fed by circular aperture and operating in the terahertz frequency range are presented in this study. Three significant advances are provided by the proposed antenna: (a) a tilted H-shaped slot allows circular polarization in the range of 5.7–6.3&#xa0;THz; (b) a defected ground structure with polarization diversity boosts inter-port isolation to over 30&#xa0;dB; and (c) integration of a metasurface-based corner reflector between the terminals adds a ±30° far-field beam tilt, which improves pattern diversity. Additionally, to provide overall design frequency agility, a thin layer of graphene is deposited on top of the silicon dielectric. The antenna functions efficiently between 4.8&#xa0;THz and 6.7&#xa0;THz, with consistent far-field and multiple-input/multiple-output (MIMO) performance throughout the band, according to findings from HFSS/CST simulation. These results confirm that the proposed radiator is a good candidate for next-generation radio transmission in the terahertz frequency band.</p>

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Pattern-Diverse Twin-Port Silicon–Graphene THz Radiator with Metasurface-Based Corner Reflector Loading and Circular Polarization

  • 期刊论文

  • 发表日期：

    2026年1月15日

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  • K. Sathish,
  • Ritesh Sadiwala,
  • Jayant Yogendra Hande,
  • Akant Kumar Raghuwanshi,
  • Vikas Kumar Vaidya

摘要

The design and investigation of a two-terminal dielectric radiator fed by circular aperture and operating in the terahertz frequency range are presented in this study. Three significant advances are provided by the proposed antenna: (a) a tilted H-shaped slot allows circular polarization in the range of 5.7–6.3 THz; (b) a defected ground structure with polarization diversity boosts inter-port isolation to over 30 dB; and (c) integration of a metasurface-based corner reflector between the terminals adds a ±30° far-field beam tilt, which improves pattern diversity. Additionally, to provide overall design frequency agility, a thin layer of graphene is deposited on top of the silicon dielectric. The antenna functions efficiently between 4.8 THz and 6.7 THz, with consistent far-field and multiple-input/multiple-output (MIMO) performance throughout the band, according to findings from HFSS/CST simulation. These results confirm that the proposed radiator is a good candidate for next-generation radio transmission in the terahertz frequency band.