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A novel metallic lens antenna formed by two layers of metallic rings with strips short-circuiting both rings is presented. The Characteristic Modes Theory is used to facilitate the design, optimization, and analysis of the proposed structure. Extensive simulations were conducted to optimize the metallic lens antenna. The results demonstrate a large operating bandwidth of 19 GHz to 25 GHz with a maximum directivity of 17.60 dBi, acceptable levels of input reflection coefficient ( \(S_{11}\) ) and side lobe level ( \(S_{LL}\) ) parameters (i.e., both below −12 dB), and low cross-polarization (below \(-20\)  dB), ensuring signal quality and optimal antenna performance.

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High-Gain Two-Layer Antenna Design Using Characteristic Modes Theory for Millimeter Wave Applications

  • 会议论文

  • 发表日期：

    2025年

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  • Luis Tello-Oquendo,
  • Daniel Santillán,
  • Daniel Garcia-Tapia,
  • Eduardo Haro-Mendoza

摘要

A novel metallic lens antenna formed by two layers of metallic rings with strips short-circuiting both rings is presented. The Characteristic Modes Theory is used to facilitate the design, optimization, and analysis of the proposed structure. Extensive simulations were conducted to optimize the metallic lens antenna. The results demonstrate a large operating bandwidth of 19 GHz to 25 GHz with a maximum directivity of 17.60 dBi, acceptable levels of input reflection coefficient ( \(S_{11}\) ) and side lobe level ( \(S_{LL}\) ) parameters (i.e., both below −12 dB), and low cross-polarization (below \(-20\)  dB), ensuring signal quality and optimal antenna performance.