Scholarlink

<p>This paper presents a compact dual-port dielectric–graphene-based terahertz (THz) antenna designed for next-generation 6G communication systems. The proposed antenna is excited through a rectangular slot aperture, which efficiently couples energy from the microstrip feed to the dielectric resonator, thereby enhancing impedance matching and radiation performance. To enhance performance, two engineered metasurface structures are incorporated into the design. A vertically oriented metasurface wall is introduced between the ports to suppress surface wave coupling and improve inter-port isolation beyond 25 dB. Additionally, a horizontally suspended metasurface acting as a partially reflecting surface (PRS) enables controlled beam tilting of approximately ± 45°, thereby enhancing radiation pattern diversity. The antenna is realized on a compact SiO₂ substrate (thickness: 1.58&#xa0;μm, ε<sub>r</sub> = 3.5) with overall dimensions in the micrometer range, making it suitable for integrated THz systems. It operates efficiently over the 4.4–4.75 THz frequency band, achieving a peak gain of approximately 5.8 dBi with stable radiation characteristics. The proposed design also exhibits excellent MIMO performance with envelope correlation coefficient (ECC) less than 0.15 and diversity gain close to 10 dB. The results are validated using both HFSS and CST full-wave solvers, showing strong agreement.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Dual-metasurface integrated dielectric–graphene THz antenna for high isolation and beam tilting

  • 期刊论文

  • 发表日期：

    2026年6月27日

查看全文
  • Shashikant Verma,
  • Rajdeep Shrivastava,
  • Rajesh Kumar Verma,
  • Khushboo Pachori,
  • Samana Vinaya Kumar

摘要

This paper presents a compact dual-port dielectric–graphene-based terahertz (THz) antenna designed for next-generation 6G communication systems. The proposed antenna is excited through a rectangular slot aperture, which efficiently couples energy from the microstrip feed to the dielectric resonator, thereby enhancing impedance matching and radiation performance. To enhance performance, two engineered metasurface structures are incorporated into the design. A vertically oriented metasurface wall is introduced between the ports to suppress surface wave coupling and improve inter-port isolation beyond 25 dB. Additionally, a horizontally suspended metasurface acting as a partially reflecting surface (PRS) enables controlled beam tilting of approximately ± 45°, thereby enhancing radiation pattern diversity. The antenna is realized on a compact SiO₂ substrate (thickness: 1.58 μm, εr = 3.5) with overall dimensions in the micrometer range, making it suitable for integrated THz systems. It operates efficiently over the 4.4–4.75 THz frequency band, achieving a peak gain of approximately 5.8 dBi with stable radiation characteristics. The proposed design also exhibits excellent MIMO performance with envelope correlation coefficient (ECC) less than 0.15 and diversity gain close to 10 dB. The results are validated using both HFSS and CST full-wave solvers, showing strong agreement.