Nature-Inspired Frequency Selective Surface in Fibonacci Spiral with Closely Resonant Bands

Oliveira, Maciel Alves de; Lazaridis, Pavlos I.; Zaharis, Zaharias D.; Gomes Neto, Alfredo; Campos, Antônio L. P. S.; Serres, Alexandre J. R.

doi:10.1590/2179-10742024v23i2280445

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Journal of Microwaves, Optoelectronics and Electromagnetic Applications

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Article • J. Microw. Optoelectron. Electromagn. Appl. 23 (2) • 2024 • https://doi.org/10.1590/2179-10742024v23i2280445 copy

Nature-Inspired Frequency Selective Surface in Fibonacci Spiral with Closely Resonant Bands

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

This paper presents a novel nature-inspired tri-band frequency selective surface (FSS) characterized by closely spaced bands, angular stability, and polarization independence. The FSS element adopts a segmented Fibonacci spiral geometry. While a single-segmented Fibonacci spiral does not inherently possess polarization independence, the proposed proof of concept achieves this by cascading the same design geometry rotated by 90° between them. Resonant frequencies of 1.63 GHz, 2.46 GHz, and 3.43 GHz are achieved, with minimal separation ratios of 1.5 from the second to the first frequency and 1.4 from the third to the second. Additionally, angular stability is confirmed up to 45°. Simulation of the FSS is conducted using HFSS software, and the simulated results are rigorously validated against experimental data, demonstrating excellent agreement.

Index Terms
closely resonant bands; Fibonacci spiral; FSS; Nature-inspired.

Work	Geometry	Polarization Independence	Angular Stability	Ease of Manufacturing
[¹⁷[17] M. D. S. Mesquita, A. G. d’Assunção, J. B. L. Oliveira, and Y. M. V. Batista, “A New Conductive Ink for Microstrip Antenna and Bioinspired FSS Designs on Glass and Fiberglass Substrates”, Journal of Microwaves, Optoelectronics and Electromagnetic Applications, vol. 18, no. 2, pp. 227 - 243, 2019-245.]	Triangular leaf of the Oxalis plant	⎯	Up to 30^o	Medium
[¹⁸[18] V. k. Kanth and S. Raghavan, “Hybrid Complementary FSS Element based on Fibonacci Spiral for Triple-band EMI Shielding Application”, 2019 IEEE 5th Global Electromagnetic Compatibility Conference (GEMCCON), Bangalore, India, pp. 1 - 4, 2019.]	Closed Fibonacci spiral combined with a square loop	⎯	Up to 60^o	Hard
[¹⁹[19] K. Varikintla and R. Singaravelu, “Design of a novel 2.5D frequency selective surface element using Fibonacci spiral for radome application”, 2018 Asia-Pacific Microwave Conference (APMC), Kyoto, pp. 1289 - 1291, 2018.]	Closed Fibonacci spiral combined with a square loop	Yes	Up to 60^o	Hard
[²⁰[20] M. S. Kelley and G. H. Huff, “Fluidic Tuning of a Frequency Selective Surface based on a Four-Arm Archimedean Spiral”, 2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), Orlando, FL, pp. 468 - 469, 2013.]	Archimedes spiral	⎯	⎯	Medium
[²¹[21] M. Kelley and G. Huff, “Dual-band frequency selective surfaces based on multi-arm subwavelength Archimedean spirals”, Electronics Letters, vol. 51, no. 19, pp. 1476 - 1478, 2015.]	Archimedes spiral	⎯	⎯	Medium
[²²[22] D. K. Wickenden, R. Awadallah, P. A. Vichot, B. M. Brawley, et al, “Polarization Properties of Frequency-Selective Surfaces Comprised of Spiral Resonators”, IEEE Transactions on Antennas and Propagation, vol. 55, no. 9, pp. 2591 - 2597, 2007.]	Segmented Fibonacci spiral	⎯	⎯	Medium
Our work	Segmented Fibonacci spiral	Yes	Up to 45^o	Easy

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