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<p>In this work, we examine the transmission spectrum and band structure of a one-dimensional (1D) periodic structure composed of loops and resonators. This structure exhibits passbands separated by wide band gaps in which the propagation of electromagnetic waves is forbidden. In particular, the number of passbands and band gaps increases with the values of the system’s geometrical parameters. Furthermore, the insertion of defects at the level of the loops and resonators leads to the appearance of one or two highly localized modes within the band gaps. These modes are characterized by high transmission rates (greater than 50%) and are highly sensitive to the geometrical parameters of the structure. Their number depends on the number of introduced defects. This structure enables the design of a high-performance multi-frequency filter. The results are obtained using the Green’s Function Method (GFM) and validated through electromagnetic simulations using the Finite Element Method (FEM).</p>

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Design and enhancement of a multi-frequency electromagnetic filter with waveguides containing loops and resonators

  • 期刊论文

  • 发表日期：

    2025年10月7日

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  • El-Aouni Mimoun,
  • Ben-Ali Youssef,
  • Rahou Zakarea,
  • Bria Driss

摘要

In this work, we examine the transmission spectrum and band structure of a one-dimensional (1D) periodic structure composed of loops and resonators. This structure exhibits passbands separated by wide band gaps in which the propagation of electromagnetic waves is forbidden. In particular, the number of passbands and band gaps increases with the values of the system’s geometrical parameters. Furthermore, the insertion of defects at the level of the loops and resonators leads to the appearance of one or two highly localized modes within the band gaps. These modes are characterized by high transmission rates (greater than 50%) and are highly sensitive to the geometrical parameters of the structure. Their number depends on the number of introduced defects. This structure enables the design of a high-performance multi-frequency filter. The results are obtained using the Green’s Function Method (GFM) and validated through electromagnetic simulations using the Finite Element Method (FEM).