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In this article, a compact triple-band bandstop frequency selective surface (FSS) is designed for terahertz applications. The proposed FSS is a single-layer structure. The unit cell consists of cross-dipoles featuring three distinct arms. The designed FSS offers three bandstop responses centered at 0.34, 0.39, and 0.43 THz with 10-dB stopband bandwidths of 12, 5, and 14 GHz, respectively. The filter operation is elucidated using surface current densities and an equivalent circuit model. The unit cell exhibits a surface area of 0.374 \(\lambda _0\) \(\times \) 0.374 \(\lambda _0\) , where \(\lambda _0\) is free space wavelength at lower resonance frequency. The proposed FSS exhibits excellent stability in incidence angles up to 40 \(^\circ \) and 80 \(^\circ \) for TE and TM polarization, respectively.

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Compact Polarization Insensitive Triple-Band Bandstop Frequency Selective Surface for Terahertz Applications

  • 会议论文

  • 发表日期：

    2026年

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  • Rusan Kumar Barik,
  • Rathod Rajender,
  • Daniele Rossi

摘要

In this article, a compact triple-band bandstop frequency selective surface (FSS) is designed for terahertz applications. The proposed FSS is a single-layer structure. The unit cell consists of cross-dipoles featuring three distinct arms. The designed FSS offers three bandstop responses centered at 0.34, 0.39, and 0.43 THz with 10-dB stopband bandwidths of 12, 5, and 14 GHz, respectively. The filter operation is elucidated using surface current densities and an equivalent circuit model. The unit cell exhibits a surface area of 0.374 \(\lambda _0\) \(\times \) 0.374 \(\lambda _0\) , where \(\lambda _0\) is free space wavelength at lower resonance frequency. The proposed FSS exhibits excellent stability in incidence angles up to 40 \(^\circ \) and 80 \(^\circ \) for TE and TM polarization, respectively.