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<p>High-gain antenna design is critical for optimizing coverage and performance in future wireless technologies because it allows us to counteract propagation limitations in high-frequency bands. This research aims to develop a dual-band metallic lens antenna featuring a central ring surrounded by 12 additional coplanar rings. We use the Characteristic Modes Theory (CMT) to validate its effectiveness, examining modal significance and currents’ distribution of each mode to ensure optimal functionality. The conducted measurements show an antenna adaptation in the ranges of 2.17–2.56&#xa0;GHz and 5.00–5.44&#xa0;GHz. Additionally, notable improvements in the directivity of the antenna stand out, demonstrating improvements within each frequency band with respect to the feed antenna, i.e., increases from 2.48&#xa0;dBi at 2.4&#xa0;GHz and from 2.56&#xa0;dBi at 5&#xa0;GHz. These findings confirm the potential of dual-band metallic lenses in 5&#xa0;G applications, as well as the usefulness of CMT antenna design for optimal operation.</p>

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On the design of dual-band metallic lens antenna illuminated by a circular waveguide for emerging wireless and 5G applications

  • 期刊论文

  • 发表日期：

    2025年12月20日

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  • Juan P. Orozco,
  • Luis Tello-Oquendo,
  • Daniel E. García,
  • Daniel A. Santillán,
  • Juan Romero-Mediavilla

摘要

High-gain antenna design is critical for optimizing coverage and performance in future wireless technologies because it allows us to counteract propagation limitations in high-frequency bands. This research aims to develop a dual-band metallic lens antenna featuring a central ring surrounded by 12 additional coplanar rings. We use the Characteristic Modes Theory (CMT) to validate its effectiveness, examining modal significance and currents’ distribution of each mode to ensure optimal functionality. The conducted measurements show an antenna adaptation in the ranges of 2.17–2.56 GHz and 5.00–5.44 GHz. Additionally, notable improvements in the directivity of the antenna stand out, demonstrating improvements within each frequency band with respect to the feed antenna, i.e., increases from 2.48 dBi at 2.4 GHz and from 2.56 dBi at 5 GHz. These findings confirm the potential of dual-band metallic lenses in 5 G applications, as well as the usefulness of CMT antenna design for optimal operation.