Polarization Insensitive Compact Wide Stop-band Frequency Selective Surface

Sood, Deepak; Tripathi, C. C.

doi:10.1590/2179-10742018v17i11128

Cited by 22 publications

(11 citation statements)

References 20 publications

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“…From Table I , it is evident that only in Reference 8, the SE is mentioned, which is lower, and also the unit cell dimension is larger in comparison to the proposed FSS. The −20 dB fractional bandwidth in References 13 and 14 is higher, however, their −10 dB operating bandwidth and the angular stability is poor than the proposed design. Though 15 exhibits high‐angular stability and polarization insensitivity, it has a lower operating bandwidth as compared with the proposed design.…”

Section: Measured Results and Discussionmentioning

confidence: 77%

“…A single‐layer single‐side ultrawide stop‐band (4‐14 GHz) FSS 13 with polarization‐insensitive and angular‐independent (up to 45° only) property is also studied. A wideband (4.5‐14.7 GHz) FSS, 14 has printed on both sides of the substrate shows angular‐independent characteristics up to 60°. Most recently a simple polarization‐insensitive and angular stable (up to 80°) FSS 15 has been published but it covers only 2.72‐13 GHz band.…”

Section: Introductionmentioning

confidence: 99%

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Low profile polarization‐insensitive wide stop‐band frequency selective surface with effective electromagnetic shielding

Paul

Mandal

Das

2021

Int J RF Microw Comput Aided Eng

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In this article, a polarization‐insensitive, higher angular stability, and single‐layered miniaturized wide stop‐band frequency selective surface (FSS) is presented for effective electromagnetic shielding over an extremely wideband (9‐20 GHz). A simple square gridded unit cell exhibits wideband rejection with −10 and −20 dB fractional bandwidth of 150.7% (3.4‐24.2 GHz) and 74.5% (9.14‐20 GHz), respectively. The designed unit cell has miniaturized dimensions (0.09λ0 × 0.09λ0 × 0.018λ0) as compared to existing research works on wideband FSSs. An equivalent circuit model is developed for the rigorous analysis of the proposed structure. The outcome of this circuit model is validated, and it shows good agreement with the structure simulation results. The measured results bear close resemblance with the simulated results. This FSS can be used to provide shielding from harmful radiations over a wide frequency range and as a good reflector to improve the gain of wideband antennas.

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Section: Measured Results and Discussionmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Low profile polarization‐insensitive wide stop‐band frequency selective surface with effective electromagnetic shielding

Paul

Mandal

Das

2021

Int J RF Microw Comput Aided Eng

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show abstract

“…In Refs. [20][21][22][23]27,28,[39][40][41][42][43][44][45][46]] BWs of 7.5, 8, 4, 4, 2.41, 1.63, 9, 7.53, 10.75, 3.64, 6.11, 10.2, 0.6 and 9.9 GHz with -10 dB attenuations having FBW of 73.17%, 116%, 48%, 48%, 28.57%, 16.35%, 98.68%, 101.53%, 136.42%, 67.9%, 121.59%, 124.39%, 50% and 120%, respectively have been achieved. However, these BWs and FBWs were achieved by compromising on SE, dimensions, thickness, angular as well as polarization stability, as depicted in Tab.…”

Section: Performance Analysis Of Uwb Fssmentioning

confidence: 99%

Ultra-wideband Frequency Selective Surface for Communication Applications

Habib¹,

Kiani²,

Butt³

et al. 2022

Computers, Materials &Amp; Continua

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A low-profile ultra-wideband (UWB) band-stop frequency selective surface (FSS) is designed for S-, C-, X-and Ku-bands communication applications. The FSS is constructed by using square and circular loop elements printed on the top and bottom sides of the RO3210 substrate. The FSS has been designed to reduce the electromagnetic interference (EMI) as well as to mitigate the harmful effects of electromagnetic radiation on the human body caused by different radio devices. The dimension and size of the UWB FSS have been reduced to 0.12 λ× 0.12 λ and 90%, respectively, as compared to the reported literature. The other advantages of the proposed FSS are that it is low profile, it has a simplified geometry and it ensures better angular and polarization stability of up to 85 • . The -10 and -20 dB bandwidths of the proposed FSS are 146% (2.0-13.0 GHz) and 80% (4.87-11.42 GHz), respectively. Theoretical results have been obtained using ANSYS HFSS and verified through measured results.

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“…These formulas were first introduced in Ref for the impedance of periodic arrays of thin continuous conducting strips, and were changed in Ref for array of square loops. Recently they were used in References and . The formulas calculate both the capacitance and inductance for arrays of square loops, but here we use them to calculate the capacitance of square patches.…”

Section: Formulationmentioning

confidence: 99%

Novel synthesis formulas to design square patch frequency selective surface absorber based on equivalent circuit model

Firouzfar

Afsahi

Orouji

2019

Int J RF Microw Comput Aided Eng

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A new procedure is presented to design electromagnetic absorbers based on resistive square patch frequency selective surface (FSS) over grounded dielectric. The periodicity (p) and the distance between two adjacent squares in the lattice (w) are two unknowns to be solved, given the thickness and permittivity of the substrate, surface impedance of the square patches and the desired reflectivity in some specified frequency. Equivalent circuit model and transmission line method are employed here. Previously reported analysis formulas to calculate the square patch FSS admittance are exploited and novel synthesis formulas are extracted based of them. The final synthesis equations to calculate p and w are presented in term of polynomials. Usually an absorber is supposed to have a maximum reflectivity r in a frequency band [f 1 , f 2 ]. The (p, w) pairs for reflectivity less than r in f 1 , define an area in p-w plane. The intersection of the so-called area with the similar one defined by f 2 specifies all possible (p, w) pairs. Finally the results are tested and verified by the commercial full wave simulator Ansys-HFSS as well as some experimental design. There is a good agreement between the expected results with the full wave analysis and practical test. K E Y W O R D S synthesis formulas, equivalent circuit, square patch FSS absorbers

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Polarization Insensitive Compact Wide Stop-band Frequency Selective Surface

Cited by 22 publications

References 20 publications

Low profile polarization‐insensitive wide stop‐band frequency selective surface with effective electromagnetic shielding

Low profile polarization‐insensitive wide stop‐band frequency selective surface with effective electromagnetic shielding

Ultra-wideband Frequency Selective Surface for Communication Applications

Novel synthesis formulas to design square patch frequency selective surface absorber based on equivalent circuit model

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