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<p>This paper presents a novel approach where tunable graphene is loaded on an ultra wide-band (UWB) antenna which is used as a switch in THz spectrum and shifts the frequency of notch band. The proposed tunable technology may be a replacement of MEMS or any other switching diodes which are being used for reconfigurability in antenna design. The impedance matching of the THz antenna is enhanced with a partial ground and a tapered-shaped radiator, offering an operating bandwidth from 3.2 to 13.2 THz. Accomplishment of a complementary split-ring resonator (CSRR) in the radiator creates a notch band from 3.55 to 4.25 THz which can be tuned with graphene strips. The changes in the chemical potential of graphene modulate the conductivity and shift the notch band from 3.55–4.25 to 4.05–5.05 THz. The antenna achieves high radiation efficiency with stable radiation pattern. The presented antenna can be used in different THz applications such as 6G, bio-sensing, and bio-imaging applications.</p>

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Tunable Graphene-Loaded Ultra Wide-Band Antenna for Reconfigurable Notch Band in THz Spectrum

  • 期刊论文

  • 发表日期：

    2025年3月15日

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  • Pankaj Jha,
  • Divya Saxena,
  • Navneet Sharma

摘要

This paper presents a novel approach where tunable graphene is loaded on an ultra wide-band (UWB) antenna which is used as a switch in THz spectrum and shifts the frequency of notch band. The proposed tunable technology may be a replacement of MEMS or any other switching diodes which are being used for reconfigurability in antenna design. The impedance matching of the THz antenna is enhanced with a partial ground and a tapered-shaped radiator, offering an operating bandwidth from 3.2 to 13.2 THz. Accomplishment of a complementary split-ring resonator (CSRR) in the radiator creates a notch band from 3.55 to 4.25 THz which can be tuned with graphene strips. The changes in the chemical potential of graphene modulate the conductivity and shift the notch band from 3.55–4.25 to 4.05–5.05 THz. The antenna achieves high radiation efficiency with stable radiation pattern. The presented antenna can be used in different THz applications such as 6G, bio-sensing, and bio-imaging applications.