Compact, dual polarized, mutliband frequency selective surface with wideband spurious rejection

Nasrollahi, Hossein; Yeganeh, Ali Nooraei; Sedighy, Seyed Hassan; Mohammad-Ali-Nezhad, Sajad

doi:10.1002/mop.30420

Cited by 13 publications

(6 citation statements)

References 21 publications

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“…In order to comprehend the novelty of the proposed structure, it is compared with previously reported bandstop FSS [8][9][10][11][12][13][14][15][16] and the results are tabulated in Tab. 2.…”

Section: Resultsmentioning

confidence: 99%

“…In order to satisfy these requirements, multiple bandstop FSS with polarization insensitivity and stability under oblique incidence are seeking attention and have been reported in recent literature [9][10][11][12][13][14][15][16]. However, for FSS structures acting as multiple bandstop filter (BSF), the response under oblique incidence gets worse as it approaches towards grazing angle of ± 90°.…”

Section: Introductionmentioning

confidence: 99%

“…However, for FSS structures acting as multiple bandstop filter (BSF), the response under oblique incidence gets worse as it approaches towards grazing angle of ± 90°. Hence, stable characteristic is limited to, generally, within ± 60° incident angle in case of triple band FSS [12][13][14][15][16]. As a result, the use of multiband bandstop FSS becomes limited in complex multipath environment.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…FSSs are the advanced EM structures for controlling wave scattering through the EM computations as the equivalent electric circuit model . FSS has fascinating applications in shielding, bioelectromagnetic issues, and vehicular telecommunications . Microwave behavior of a transparent band‐stop window consists of cascaded surfaces made with transparent thin‐film indium tin oxide (ITO) has been investigated in Reference .…”

Section: Introductionmentioning

confidence: 99%

Transparent dual band Wi‐Fi filter for double glazed energy saving window as a smart network

Pakdin

Ghayekhloo

Rezaei

et al. 2019

Micro & Optical Tech Letters

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A transparent advanced electromagnetic structure is designed to be used in real‐world Wi‐Fi shielding applications. Concentric square loops as frequency selective surfaces (FSSs) are analytically presented with the Pyrex glass substrate based on the equivalent electric circuit model. The designed FSS window suppresses signals at both 2.5 and 5 GHz bands, and reflects back to the indoor medium. Visible light transmittance of the studied window is achieved as 87%. Accordingly, other electromagnetic communication links can transfer through the designed filter such as cell phone, and radio. The dependency of the proposed window to polarization and angular variations is examined numerically, which shows stable frequency response at 2.5 GHz and an acceptable one for 5 GHz. As a figure of merit, the proposed structure is a double glazed window with potential application for smart, secure, and energy‐saving buildings. Also, practical considerations regarding the deployment of FSS on window glass and the separation distance between the glass layers have been investigated. A prototype of the proposed design is fabricated and measured that a good agreement between measurement and simulation is demonstrated. Therefore, parametric circuit model analysis, deployment of transparent substrate, thin metallic parts on one layer, secure indoor communications, and energy‐saving are some of the advantages of the proposed window.

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“…Although these early two references are dual‐polarized, angular stable and multi‐band, their resonant frequencies are close and wide controlling the frequencies in the design procedure is not possible. The loop and dipole structure can become more compact by adding capacitive or inductive loading . In addition to discrete components, capacitive loading can be achieved by using vias (metalized vertical holes in substrate) …”

Section: Introductionmentioning

confidence: 99%

Dual‐band, dual‐polarized, and compact frequency selective surface

Yeganeh

Mohammad-Ali-Nezhad

Najmolhoda

et al. 2019

Int J RF Microw Comput Aided Eng

Self Cite

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In this article, a compact, dual‐band, dual‐polarized band pass single‐layered frequency selective surface (FSS) structure with stable performance in wide incident angles is designed and fabricated. This structure is designed with a new proposed approach which is the combination of miniaturized‐element band stop FSS and high pass grid FSS. For this purpose, a new compact band stop structure is introduced and miniaturized by adding vertical metalized holes (vias) in the substrate as additional capacitive. A WLAN band stop FSS is designed also as an example of the proposed miniaturized‐element. Then, this band stop FSS is combined with a simple high pass grid structure to design the proposed band pass FSS. The circuit models of these FSSs are also extracted to achieve better description of the structures and combination idea. The dimensions of the final designed compact band pass FSS structure is 0.048λ × 0.048λ where λ is the free space wavelength of the first resonance frequency. The fabrication results of this FSS which works at WLAN bands are in good agreement with the simulation ones which prove the design approach.

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Compact, dual polarized, mutliband frequency selective surface with wideband spurious rejection

Cited by 13 publications

References 21 publications

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

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

Transparent dual band Wi‐Fi filter for double glazed energy saving window as a smart network

Dual‐band, dual‐polarized, and compact frequency selective surface

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