Miniaturised bandstop frequency selective surface based on quasi‐lumped inductor and capacitor

Zhao, Pengchao; Zong, Zhi‐Yuan; Li, Bo; Wu, Wen; Fang, Da‐Gang

doi:10.1049/el.2017.0548

Cited by 14 publications

(4 citation statements)

References 9 publications

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“…When the fractal level increases from 0 to 3, the perimeter of the figure gets longer, so a reduction in the resonant frequency can be observed. According to the formula

BW\propto \sqrt{{C}_{\mathrm{eq}}/{L}_{\mathrm{eq}}}

, 21 the bandwidth of FSS can be narrowed by increasing the equivalent inductance L eq . Therefore, the bandwidth of the FSS is narrowed when fractal level k = 0–3.…”

Section: Analysis Of Simulated Resultsmentioning

confidence: 99%

Design of single‐layer bandstop fractal frequency selective surface based on WLAN applications

Chen,

Liu,

Zhang

et al. 2023

Micro & Optical Tech Letters

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In this letter, we present a new frequency selective surface (FSS) for shielding 2.4–2.5 and 4.98–5.825 GHz wireless local area network (WLAN) bands. This FSS structure is based on the traditional Sierpinski octagon and we improve it. Compared with the traditional structure, the improved one has a smaller element size and better angular stability. The design is realized on float glass with a relative permittivity () of 8, and the unit cell size is 0.1152λ0 × 0.1152λ0 (λ0 is the free space wavelength at the first resonant frequency). Wide rejection bandwidths (−10 dB) of 910 and 1630 MHz are obtained at 2.4–2.5 and 4.98–5.825 GHz, respectively. The surface current distribution and the equivalent circuit model are illustrated to explain the resonance behavior of the proposed FSS. Furthermore, this FSS exhibits stable frequency response to incident angles of 0°–80° under transverse electric and transverse magnetic polarizations. Finally, this FSS structure was fabricated and measured. The measured results demonstrate that this FSS structure has good performance in WLAN applications.

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“…When the fractal level increases from 0 to 3, the perimeter of the figure gets longer, so a reduction in the resonant frequency can be observed. According to the formula

BW\propto \sqrt{{C}_{\mathrm{eq}}/{L}_{\mathrm{eq}}}

, 21 the bandwidth of FSS can be narrowed by increasing the equivalent inductance L eq . Therefore, the bandwidth of the FSS is narrowed when fractal level k = 0–3.…”

Section: Analysis Of Simulated Resultsmentioning

confidence: 99%

Design of single‐layer bandstop fractal frequency selective surface based on WLAN applications

Chen,

Liu,

Zhang

et al. 2023

Micro & Optical Tech Letters

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“…Z D indicates the intrinsic impedance of the dielectric substrate. The bandstop resonance due to each LC branch is given by, 1 , 1,2,3. s 2 0.…”

Section: Impedance Analysis At the Notch Bandsmentioning

confidence: 99%

“…Frequency selective surfaces (FSS) have attracted the attention of researchers for their variety of electromagnetic (EM) properties which include their use as bandstop and bandpass filters [1], [2], artificial magnetic conductors [3], polarization converters [4] and reactive impedance surfaces [5]. The FSS structures exhibiting bandstop filter characteristics find applications in EM shielding, antenna beam shaping and reflector antennas [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Design of Compact Polarization Insensitive Triple Bandstop Frequency Selective Surface with High Stability under Oblique Incidence

Ghosh¹,

Banerjee²,

Das³

2019

RADIOENGINEERING

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This paper proposes a novel design of a triple band frequency selective surface (FSS) that acts as a bandstop filter at 1.92 GHz, 3.5 GHz and 5.64 GHz. The bandstop frequencies resemble to GSM, WLAN and WiMAX application bands respectively. The structure is polarization insensitive since its frequency response remains unaltered for both TE and TM modes of electromagnetic wave propagation. The main attractive feature of the structure is its highly stable response under oblique incident angle up to ±80° at both TE and TM polarizations. Surface current distribution and equivalent circuit modeling are presented to demonstrate the resonance characteristic of the FSS. The structure is compact with an overall unit cell area of 0.09λ  0.09λ, where λ is the wavelength corresponding to the lowest resonant frequency. The proposed structure is compared with other multi-bandstop FSS structures in literature to highlight its superior functionality in terms of stability under oblique incidence and compactness. A prototype comprising of 6  6 array of the proposed unit cell is fabricated and the measured results are in good agreement with the simulated results. KeywordsFrequency selective surface, bandstop filter, polarization insensitive, oblique incidence angle, compact

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“…One of the methods implemented for the broad banding of FSSs is the application of fractal geometries for the unit cell, which also brings about miniaturization 6 , 7 . Recently, a new miniaturized type of FSS unit cells called MEFSS has been introduced in the literature 8 , a variety of structures have been introduced for the miniaturization of FSS, such as using lumped elements 9 , interdigital capacitance structures 10 , closed metallic loops and their complementary loops 11 and 2.5-D close loop FSS 12 , 13 .…”

Section: Introductionmentioning

confidence: 99%

Miniaturization of frequency selective surface by 2.5-dimensional meandered split ring cells for application in L-band

Khajevandi,

Oraizi

2023

Sci Rep

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In this research article, A miniaturized hexagonal split-ring 2.5-dimensional (2.5-D) unit cell is proposed for frequency selective surface (FSS) applications. The 2.5-D FSS provides efficient usage of the available surfaces and optimum increased current paths by connecting its two sides through vias. The size of the FSS unit cell is $$0.026{{\varvec{\uplambda}}}_{0}\times 0.026{{\varvec{\uplambda}}}_{0}$$ 0.026 λ 0 × 0.026 λ 0 at the resonance frequency of 1.25 GHz. The proposed FSS has good angle stability due to its small size. The effects of variation of FSS geometry parameters on transmission zero are investigated, namely, the control of bandwidth and roll-off of frequency response by these parameters is studied. An equivalent circuit is obtained for the proposed structure to predict its frequency response, which agrees very well with the results of full-wave simulations. A prototype model of the proposed FSS structure is designed, simulated, fabricated, and tested as proof of concept.

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Miniaturised bandstop frequency selective surface based on quasi‐lumped inductor and capacitor

Cited by 14 publications

References 9 publications

Design of single‐layer bandstop fractal frequency selective surface based on WLAN applications

Design of single‐layer bandstop fractal frequency selective surface based on WLAN applications

Design of Compact Polarization Insensitive Triple Bandstop Frequency Selective Surface with High Stability under Oblique Incidence

Miniaturization of frequency selective surface by 2.5-dimensional meandered split ring cells for application in L-band

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