Double Layer Frequency Selective Surface for Ultra Wide Band Applications with Angular Stability and Polarization Independence

Segundo, Francisco Carlos Gurgel da Silva; Campos, Antônio Luiz P. S.; Neto, Alfrêdo Gomes; Alencar, Marina de Oliveira

doi:10.1590/2179-10742019v18i31696

Cited by 6 publications

(2 citation statements)

References 13 publications

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“…1 Band reject FSSs consisting array of square loops, 11 circular loops 10 and modified circular loops 12 have been reported. Also, higher order square loop FSSs exhibiting wide stopband have been reported earlier by cascading two metallic arrays on both sides of dielectric substrate, 13,14 double-layer FSSs, 15,16 and triple layer FSSs, 17 and so forth. Multiple band reject FSSs are demonstrated by concentric array of square loops 18 and circular rings.…”

Section: Introductionmentioning

confidence: 67%

Dual rhombic loop‐based frequency selective surfaces for X‐band applications

Verma

Singhal

2022

Micro & Optical Tech Letters

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Dual rhombic loop (DRL) based low‐cost X‐band frequency selective surfaces (FSSs) with stopband characteristics are presented in this study. Orthogonally oriented arrays of rhombic loop pairs are printed back‐to‐back (BTB) on both sides of dielectric substrate to achieve wide stopband characteristics with stable response under oblique incidences. The nonlinearities in the reflection phase of BTB DRL printed FSSs are compensated by printing orthogonally oriented rhombic loop pairs on the same side of the substrate. Merging orthogonally oriented rhombic loop pairs results in a single‐layer wide stopband FSS with linear reflection phase under normal incidence. Both polarization dependent merged DRL (MDRL) and independent BTB DRL FSSs are developed and experimentally validated. As per measurements, the BTB printed FSS array exhibits 4.3 GHz wide stopband with transmission nulls at 7.9 and 10 GHz while the single side printed FSS exhibits 3.7 GHz wide stopband with transmission null at 8.3 GHz.

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Section: Introductionmentioning

confidence: 67%

Dual rhombic loop‐based frequency selective surfaces for X‐band applications

Verma

Singhal

2022

Micro & Optical Tech Letters

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“…It features 7.5 GHz stopband to provide shielding in both X-and Ka-bands from 6.5 to 14 GHz range. Although many other wideband FSS designs can be found in the literature [22][23][24][25][26][27] , most of them lack stability in terms of polarization and the incidence angle, whereas others are bulky and complicated to manufacture.…”

mentioning

confidence: 99%

Novel versatile topologies and design optimization of wide-bandstop frequency selective surfaces for X-band, Ku-band and millimeter-wave applications

Aziz

Kozieł

Leifsson³

et al. 2023

Sci Rep

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Novel designs of frequency selective surface (FSS) are presented for wideband applications in X, Ku and mmWave (millimeter Wave) bands. Two identical metallic layers of FSS are imprinted on both sides of the RO4003 substrate. The geometry parameters are optimized to maximize the bandstop at the specified in-band maximum transmission level of −10 dB; satisfaction of the latter condition is enforced through appropriate formulation and handling of the design constraints. The proposed structure is versatile and can be readily re-designed for various operating bands. For the sake of illustration, two instances of the FSS were developed. Design 1 exhibits broad bandstop of 9.8 GHz at the X- and Ku-bands, whereas the bandstop of Design 2 is 33.5 GHz at the mmWave band. The two FSS unit cell designs share the same base topology, but specific dimensions are adjusted to operate within the lower and the higher bands, respectively. The unit cell is symmetrical, therefore, ensures an excellent resonance stability performance with respect to different polarizations (TE and TM) and incidence angles. For proof of concept only FSS Design 1 is fabricated and measured in an anechoic chamber. The simulated and measured results exhibit good agreement. Extensive benchmarking against state-of-the-art FSS designs from the literature corroborates the advantages of the proposed topology in terms of design novelty, topological versatility, compact size, and wide bandstop response as compared to the previously available designs.

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Performance enhancement of an ultra‐wideband antenna using a compact topology optimized single frequency selective surface‐layer as a reflector

Melouki

Hocini

Denidni

2022

Int J RF Mic Comp-Aid Eng

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In this article, an ultra‐wideband (UWB) topology optimized frequency selective surface (FSS) is introduced as a reflecting layer, to maximize the gain and overall performances of an UWB monopole antenna. The single Rogers RO4350B‐based FSS layer is synthesized using an automated system, based on an interface bridged between CST Microwave studio and Matlab, and optimized using a binary genetic algorithm. First, the FSS unit cell foot print needs to be as small as possible, while covering a wider frequency range, and to achieve these performances, the proposed genetic algorithm synthesizing system achieved an FSS unit cell with only 0.1 λ × 0.1 λ at the lower‐end frequency, covering a bandwidth of 2.9–14.5 GHz. Polarization independence is achieved also, due to the four‐folded symmetry imposed on the FSS unit cell. The proposed antenna is designed on a Rogers RO4350B substrate, and backed at a distance of 18.74 mm by an FSS structure. The fabricated prototype shows a bandwidth of 3.1–13.9 GHz, and an excellent maximum peak gain of 9.7 dBi, with an improvement of 3.41 dBi cross the UWB spectrum (from 3.7 to 7.11 dBi), and in good agreement with the simulation results, which made the proposed design a promising candidate for UWB applications requiring high gain, such as ground‐penetrating radar, and microwave radiology imaging (MRI) systems.

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Double Layer Frequency Selective Surface for Ultra Wide Band Applications with Angular Stability and Polarization Independence

Cited by 6 publications

References 13 publications

Dual rhombic loop‐based frequency selective surfaces for X‐band applications

Dual rhombic loop‐based frequency selective surfaces for X‐band applications

Novel versatile topologies and design optimization of wide-bandstop frequency selective surfaces for X-band, Ku-band and millimeter-wave applications

Performance enhancement of an ultra‐wideband antenna using a compact topology optimized single frequency selective surface‐layer as a reflector

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