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Dual-polarized third-order wideband bandpass frequency selective surface for X band and Ku band application

Author

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  • Srimita Coomar
  • Rajarshi Sanyal
  • Santanu Mondal

Abstract

A third-order dual-polarized elliptic wide passband Frequency Selective Surface (FSS) has been proposed in this article. The unit cell is comprised of Y-shaped fractal geometry integration on the tri-pole and evolved as the stub-loaded tri-pole (SLTP) structure on an ultra-thin FR-4 substrate (ϵr = 4.4). The novel back-to-back cascading approach of the aforesaid proposed design array with optimized air spacer enhances electromagnetic coupling, resulting in maximally flat and substantially wider third-order bandpass filtering capability. −3 dB passband filtering performance (8.3–20.1 GHz) and −1 dB transmission characteristics (8.9–19.8 GHz) encompass the X and Ku band spectral ranges. The elliptical transmission coefficient leads to a remarkable passband selectivity factor (SF = 0.91). Equivalent circuit models (ECM) have been mapped, and the prototype has been experimentally validated. Angular stability (θ ≤ 40°) for both TE and TM polarizations ensures the employability of the proposed FSS for the radome.

Suggested Citation

  • Srimita Coomar & Rajarshi Sanyal & Santanu Mondal, 2024. "Dual-polarized third-order wideband bandpass frequency selective surface for X band and Ku band application," Journal of Electromagnetic Waves and Applications, Taylor & Francis Journals, vol. 38(10), pages 1069-1087, July.
    • Handle: RePEc:taf:tewaxx:v:38:y:2024:i:10:p:1069-1087
    DOI: 10.1080/09205071.2024.2354730
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