A Minkowski fractal Frequency Selective Surface with high angular stability

Brito, Davi Bibiano; Araujo, Lincoln M.; D’Assunção, Adaildo G.; Maniçoba, Robson Hebraico Cipriano

doi:10.1109/imoc.2013.6646577

Cited by 12 publications

(6 citation statements)

References 7 publications

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“…The proposed work regarding the exploration of fractal pair cascading also considers two approaches: broadening of the pass band and keeping closer separation between in band pole and out band zero which ensures the sharp and steep pass band roll-off characteristics. Several other literatures [26][27][28] also focused on the excellent angular stability of the fractal geometry which is a prime concern for this proposed work, particularly in EM stealth application. The multilayered cascaded hybrid resonating FSS may suffer due to the angular instability.…”

Section: Relevance Of the Double-layered Fractal Structurementioning

confidence: 99%

Highly selective, fractal-configured UWB-FSS for sub-6 GHz 5G, GSM, WLAN, and C band electromagnetic stealth application

Chattopadhyay

Coomar

Mondal

et al. 2023

Int. J. Microw. Wireless Technol.

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A miniaturized and flexible frequency-selective surface (FSS) has been presented in this article with a unit cell size of 0.049 λc × 0.049 λc where λc is the free space wavelength at the lower cut-off frequency. In order to achieve an ultra-wide (−3 dB) second order pass band of 151.3% with enhanced selectivity factor of 0.887, a cascaded triple layered hybrid resonating structure has been proposed with symmetrical Minkowski island-shaped fractal geometry pair and spiral-shaped middle layer in optimized air gap coupling. Furthermore, 149.8% ultra-wide pass band also ascertains the conformal feature of the proposed structure. In addition to this, the proposed FSS provides the stable angular response for both TE and TM polarization. An equivalent circuit model has been synthesized for accurate frequency response. Finally, a sample prototype has been fabricated to verify the experimental validation. Excellent angular stability under large oblique incident and significant conformal characteristics ensure the compatibility of the proposed structure for electromagnetic stealth in 0.9–1.8 GHz GSM band, 2.10–2.14 GHz wireless medical telemetry band, 2.4–2.5 and 4.9–5.8 GHz WLAN band, 3.4–3.7 and 4.4–4.9 GHz sub-6 GHz 5 G band, and 3.7–4.2 GHz C band.

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Section: Relevance Of the Double-layered Fractal Structurementioning

confidence: 99%

Highly selective, fractal-configured UWB-FSS for sub-6 GHz 5G, GSM, WLAN, and C band electromagnetic stealth application

Chattopadhyay

Coomar

Mondal

et al. 2023

Int. J. Microw. Wireless Technol.

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“…With a higher value of incident angle, the unit cell periodicity should be half the free space wavelength to prevent the occurrence of the grating lobe phenomena-a limitation that can be prevented by implementing a fractal structure to miniaturize the FSS. For example, extensive studies over the past decade have integrated patch or slot elements with the fractal structures such as the Koch fractal structure [3,19], the Minkowski [20] and the Minkowski island [21], the Interdigital fractal structure [22], the Sierpinski fractal structure [23], the Swastika fractal structure [24] etc., to reduce the size of the FSS element.…”

Section: Design Of Fractal-based Frequency Selective Surfacementioning

confidence: 99%

Characterization of the koch fractal hexagonal loop frequency selective surface for X-band application

Nafis

Ayop

Majid

et al. 2020

IJEECS

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<p>This paper presented the bandstop Koch fractal hexagonal loop frequency selective surface (FSS) for the X-band application. The simulated transmission coefficient response (S_21) had been obtained by using CST software. The proposed Koch fractal hexagonal loop FSS structure is highly insensitive towards angular stability and also incident polarization up to 60 degree , with deviation of resonant frequency, f_r below than 1%. The parametric analysis on the effect of the periodicity, width, and height of the fractal FSS structure on the S_21 has been illustrated and discussed thoroughly.</p>

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“…Currently, FSS with spiral elements, angular stability, polarization independent, and multiband or wideband characteristics (transmission or reflection), has received special attention [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%