scholarly journals Frequency Selective Surfaces: A Review

2018 ◽  
Vol 8 (9) ◽  
pp. 1689 ◽  
Author(s):  
Rana Anwar ◽  
Lingfeng Mao ◽  
Huansheng Ning
Keyword(s):  
Experimental Studies ◽  
Dielectric Substrate ◽  
Structure Design ◽  
Array Element ◽  
Frequency Selective Surfaces ◽  
Spatial Filters ◽  
Practical Applications ◽  
Significant Performance ◽  
Frequency Selective ◽  
Microwave Regime

The intent of this paper is to provide an overview of basic concepts, types, techniques, and experimental studies of the current state-of-the-art Frequency Selective Surfaces (FSSs). FSS is a periodic surface with identical two-dimensional arrays of elements arranged on a dielectric substrate. An incoming plane wave will either be transmitted (passband) or reflected back (stopband), completely or partially, depending on the nature of array element. This occurs when the frequency of electromagnetic (EM) wave matches with the resonant frequency of the FSS elements. Therefore, an FSS is capable of passing or blocking the EM waves of certain range of frequencies in the free space; consequently, identified as spatial filters. Nowadays, FSSs have been studied comprehensively and huge growth is perceived in the field of its designing and implementation for different practical applications at frequency ranges of microwave to optical. In this review article, we illustrate the recent researches on different categories of FSSs based on structure design, array element used, and applications. We also focus on theoretical breakthroughs with fabrication techniques, experimental verifications of design examples as well as prospects and challenges, especially in the microwave regime. We emphasize their significant performance parameters, particularly focusing on how advancement in this field could facilitate innovation in advanced electromagnetics.

scholarly journals Continuous-range tunable multilayer frequency-selective surfaces using origami and inkjet printing

2018 ◽  
Vol 115 (52) ◽  
pp. 13210-13215 ◽  
Author(s):  
Syed Abdullah Nauroze ◽  
Larissa S. Novelino ◽  
Manos M. Tentzeris ◽  
Glaucio H. Paulino
Keyword(s):  
Low Cost ◽  
Frequency Selective Surfaces ◽  
Angle Of Incidence ◽  
Spatial Filters ◽  
Continuous State ◽  
Subtractive Manufacturing ◽  
Time Requirements ◽  
Frequency Selective ◽  
Tunable Frequency ◽  
Electrical Components

The tremendous increase in the number of components in typical electrical and communication modules requires low-cost, flexible and multifunctional sensing, energy harvesting, and communication modules that can readily reconfigure, depending on changes in their environment. Current subtractive manufacturing-based reconfigurable systems offer limited flexibility (limited finite number of discrete reconfiguration states) and have high fabrication cost and time requirements. Thus, this paper introduces an approach to solve the problem by combining additive manufacturing and origami principles to realize tunable electrical components that can be reconfigured over continuous-state ranges from folded (compact) to unfolded (large surface) configurations. Special “bridge-like” structures are introduced along the traces that increase their flexibility, thereby avoiding breakage during folding. These techniques allow creating truly flexible conductive traces that can maintain high conductivity even for large bending angles, further enhancing the states of reconfigurability. To demonstrate the idea, a Miura-Ori pattern is used to fabricate spatial filters—frequency-selective surfaces (FSSs) with dipole resonant elements placed along the fold lines. The electrical length of the dipole elements in these structures changes when the Miura-Ori is folded, which facilitates tunable frequency response for the proposed shape-reconfigurable FSS structure. Higher-order spatial filters are realized by creating multilayer Miura-FSS configurations, which further increase the overall bandwidth of the structure. Such multilayer Miura-FSS structures feature the unprecedented capability of on-the-fly reconfigurability to different specifications (multiple bands, broadband/narrowband bandwidth, wide angle of incidence rejection), requiring neither specialized substrates nor highly complex electronics, holding frames, or fabrication processes.

scholarly journals Analyze of Frequency Selective Surfaces By Hybrid MOM-PO-GTD Method

2019 ◽  
Author(s):  
samir mendil ◽  
Taoufik Aguili
Keyword(s):  
Hybrid Method ◽  
Moment Method ◽  
Performance Metrics ◽  
Frequency Selective Surface ◽  
Frequency Selective Surfaces ◽  
Incoming Wave ◽  
Periodic Surface ◽  
New Approach ◽  
Frequency Selective ◽  
Microwave Regime

Abstract This article intends to analyze the Diraction phenomena of the incoming wave and provide a new approach for analyzing the frequency selective surface (Fss) by using a hybrid method combining Moment Method (MoM), optical physics (PO) with General theory of Diffraction (GTD). the frequency selective surface (Fss) is a periodic surface with identical two-dimensional arrays of elements arranged on a substrate dielectric. An incoming plane wave will either be transmitted (bandwidth) or reflected (stopband), completely or partially, depending on the nature of the array element. Today, FSSs have been extensively studied and there is tremendous growth in its design and implementation for different applications at the microwave to optical frequency ranges. In this review article, we present a new hybrid method form on Moment method and GTD for analyzing different categories of FSS based on the design of the structure, the array elements used, and applications. We also focus on the effects of diffraction, methodology, experimental verications of design examples, as well as on prospects and challenges, particularly in the microwave regime. We highlight their important performance metrics, especially about progress in this area could facilitate advanced electromagnetic innovation.

scholarly journals Complementary frequency selective surface pair-based intelligent spatial filters for 5G wireless systems

2021 ◽  
Vol 30 (1) ◽  
pp. 1054-1069
Author(s):  
Ankush Kapoor ◽  
Ranjan Mishra ◽  
Pradeep Kumar
Keyword(s):  
Frequency Selective Surface ◽  
Dielectric Substrate ◽  
Spatial Filter ◽  
Spatial Filters ◽  
Band Pass ◽  
Frequency Selective ◽  
5 Ghz ◽  
Design Simplicity ◽  
Independent Behavior ◽  
The Impact

Abstract Frequency selective surface (FSS)-based intelligent spatial filters are capturing the eyes of the researchers by offering a dynamic behavior when exposed to the electromagnetic radiations. In this manuscript, a concept of creating complementary structures which stems from Babinet’s principle is illustrated. A hybrid complementary pair of FSS (CPFSS) comprising double square loop FSS (DSLFSS) and double square slot FSS (DSSFSS) on either side of the dielectric substrate is proposed. DSLFSS offers band-pass behavior and can be placed as a superstrate, whereas DSSFSS behaves as a band-stop intelligent spatial filter that blocks the radiations falling on it, thus making them applicable for use as a substrate. The technique utilized for analyzing DSLFSS and DSSFSS structures is based on the equivalent circuit modeling and transmission line methodology. The CPFSS structure offers the design simplicity, hence, suitable for placing them with the printed patch antenna radiators in wireless networking devices operating in sub-6 GHz 5G spectrum. DSLFSS offers band-pass behavior ranging from 2.99 to 5.56 GHz, whereas DSSFSS offers band-stop behavior ranging from 2.85 to 5.42 GHz covering all n77 (3.3–4.2 GHz), n78 (3.3–3.8 GHz), and n79 (4.4–5 GHz) bands of FR1 spectrum of sub-6 GHz 5G range. The passband and the stopband offered by the two structures of CPFSS geometry are stable to oblique angles of incidence and the proposed design also offers polarization-independent behavior. The thickness of the dielectric region existing within the pair of designed structures is critical for the location of the passbands and the stopbands. The impact of the overall thickness of the dielectric substrate on the passbands and stopbands is also reported in this article.

scholarly journals Design of Ultrawide Bandwidth Electromagnetic Wave Absorbers with Square Patch Frequency Selective Surfaces with Different Geometries

2020 ◽  
Vol 58 (5) ◽  
pp. 326-333
Author(s):  
Tian Liu ◽  
Sung-Soo Kim
Keyword(s):  
Electromagnetic Wave ◽  
Free Space ◽  
Impedance Matching ◽  
Test Sample ◽  
Dielectric Substrate ◽  
Frequency Selective Surfaces ◽  
Total Thickness ◽  
Wide Bandwidth ◽  
Wire Conductor ◽  
Frequency Selective

A reliable and efficient numerical method is presented for the design of broadband absorbers, fabricated by layering two square patch-frequency selective surfaces (SP-FSS) with different geometries on a grounded dielectric substrate. The circuit parameters of the inductance and capacitance of the SP-FSS were retrieved using the strip wire conductor model. Due to the high capacitance and low inductance of the SPFSS, a nearly constant resonance frequency (<i>f</i><sub>0</sub> = 37 GHz) is observed, irrespective of patch size at a given unit cell periodicity of 7.5 mm. For the SP-FSS, the circuit is capacitive below <i>f</i><sub>0</sub> and inductive above <i>f</i><sub>0</sub>. For a grounded substrate with a quarter wavelength thickness, however, the input impedance is inductive below <i>f</i><sub>0</sub>, resulting in impedance matching over a wide frequency range, with the controlled FSS resistance matched to the free-space impedance. The double-layer absorber was designed by optimizing the surface resistance and layer thickness of two SP-FSSs with different geometries, and demonstrated a 10 dB absorption bandwidth of 6.1−41.4 GHz with a total thickness of 5 mm, which is equal to the theoretical limit. A test sample was prepared by screen printing method, and the free space measurement demonstrated a wide-bandwidth absorption result (4.7−40.0 GHz for −10 dB reflection loss) with a small total thickness (5.4 mm). The simulation and experimental results strongly validated the SP-FSS for the design of wide bandwidth electromagnetic wave absorbers.

scholarly journals Analysis and Characterization of Finite-size Curved Frequency Selective Surfaces

2015 ◽  
Vol 2 (1) ◽  
pp. 9 ◽  
Author(s):  
Francesco Mattiello ◽  
Giovanni Leone ◽  
Giuseppe Ruvio
Keyword(s):  
High Performance ◽  
Finite Size ◽  
Frequency Selective Surfaces ◽  
Spatial Filters ◽  
Planar Structures ◽  
Significant Research ◽  
Planar Array ◽  
Band Pass ◽  
Infrared Wavelengths ◽  
Frequency Selective

Frequency Selective Surfaces (FSSs) are spatial filters that are largely employed in radomes for radars and antennas where high performance is necessary. FSS can be categorised in terms of their frequency behaviour. Band-pass FSS structures are able to let the electromagnetic wave pass in certain frequency ranges and shield others, which are especially suitable for out-of-band stealth of radomes. The properties of frequency selectiveness of these screens are used at microwave and infrared wavelengths. By tuning the electrical size and geometry of the unit-cell (patch or aperture) different frequency behaviours of the structure are generated. Although their analysis and simulation is significantly simplified with the approximation of infinite and planar array, in some real applications FSS are required to be conformal to limited non-planar structures. The literature on the problem of characterizing finite-size and curved FSS has been sparse and more focused on the single application rather than on a unified approach. In the aim of synthesizing valuable techniques, this paper reviews significant research results on truncated and curved FSS which were presented in the dedicated literature.

Design and Preparation of Light-Weight Radar Absorbing Material Based on Resistive Frequency Selective Surfaces

2011 ◽  
Vol 335-336 ◽  
pp. 976-980 ◽  
Author(s):  
Liang Kui Sun ◽  
Hai Feng Cheng ◽  
Yong Jiang Zhou ◽  
Wang Jun
Keyword(s):  
Dielectric Substrate ◽  
Experimental Result ◽  
Frequency Selective Surfaces ◽  
Light Weight ◽  
Rigid Polyurethane Foam ◽  
Design And Optimization ◽  
Radar Absorbing Material ◽  
Absorbing Material ◽  
Equivalent Circuit Method ◽  
Frequency Selective

Light-weight radar absorbing material (RAM) based on resistive frequency selective surfaces (FSS) was designed and prepared. The principle of the resonances of the RAM was analyzed by calculating the impedance of the FSS and the grounded substrate according to the equivalent circuit method, and the results show that a wideband absorbing structure can be gained by producing two adjacent resonances. After design and optimization by Genetic Algorithm (GA), the RAM with absorbing bandwidth of 7.5~18GHz below -10dB was obtained, whose thickness is only 3mm. The designed RAM was gained by preparing resistive patches on the grounded dielectric substrate of rigid polyurethane foam using screen painting technology. The density of the absorber is only 0.2g/cm3, the reflectivity was measured and it shows that the experimental result is consistent with the design one.

scholarly journals Simple, Compact, and Multiband Frequency Selective Surfaces Using Dissimilar Sierpinski Fractal Elements

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Clarissa de Lucena Nóbrega ◽  
Marcelo Ribeiro da Silva ◽  
Paulo Henrique da Fonseca Silva ◽  
Adaildo Gomes D’Assunção ◽  
Gláucio Lima Siqueira
Keyword(s):  
High Frequency ◽  
Design Methodology ◽  
Frequency Tuning ◽  
Microstrip Antennas ◽  
Frequency Selective Surfaces ◽  
Experimental Characterization ◽  
Spatial Filters ◽  
Frequency Responses ◽  
Frequency Selective

This paper presents a design methodology for frequency selective surfaces (FSSs) using metallic patches with dissimilar Sierpinski fractal elements. The transmission properties of the spatial filters are investigated for FSS structures composed of two alternately integrated dissimilar Sierpinski fractal elements, corresponding to fractal levelsk=1, 2, and 3. Two FSS prototypes are fabricated and measured in the range from 2 to 12 GHz to validate the proposed fractal designs. The FSSs with dissimilar Sierpinski fractal patch elements are printed on RT/Duroid 6202 high frequency laminate. The experimental characterization of the FSS prototypes is accomplished through two different measurement setups composed of commercial horns and elliptical monopole microstrip antennas. The obtained results confirm the compactness and multiband performance of the proposed FSS geometries, caused by the integration of dissimilar fractal element. In addition, the proposed FSSs exhibited frequency tuning ability on the multiband frequency responses. Agreement between simulated and measured results is reported.

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