Relevant bibliographies by topics / Frequency Selective Surfaces (FSSs)

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  2. Dissertations / Theses
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Academic literature on the topic 'Frequency Selective Surfaces (FSSs)'

Author: Grafiati
Published: 19 February 2023
Last updated: 20 February 2023

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Journal articles on the topic "Frequency Selective Surfaces (FSSs)"

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Anwar, Rana, Lingfeng Mao, and Huansheng Ning. "Frequency Selective Surfaces: A Review." Applied Sciences 8, no. 9 (2018): 1689. http://dx.doi.org/10.3390/app8091689.

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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.
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Nóbrega, Clarissa de Lucena, Marcelo Ribeiro da Silva, Paulo Henrique da Fonseca Silva, Adaildo Gomes D’Assunção, and Gláucio Lima Siqueira. "Simple, Compact, and Multiband Frequency Selective Surfaces Using Dissimilar Sierpinski Fractal Elements." International Journal of Antennas and Propagation 2015 (2015): 1–5. http://dx.doi.org/10.1155/2015/614780.

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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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Littman, Nickolas, Steven G. O’Keefe, Amir Galehdar, Hugo G. Espinosa, and David V. Thiel. "Bandwidth control of loop type frequency selective surfaces using dual elements in various arrangements." Flexible and Printed Electronics 6, no. 4 (2021): 045009. http://dx.doi.org/10.1088/2058-8585/ac361a.

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Abstract Frequency selective surfaces (FSSs) have applications across multiple disciplines due to their unique electromagnetic properties. This paper investigates the use of both rounded square loops, and simple loop type dual elements arranged in unique patterns, to control the transmission and reflection bandwidth and resonant frequencies over KU and K frequency bands supported by equivalent circuit models. The FSSs were fabricated using laser engraving to create conductive loop type elements on a thin, flexible and optically transparent Mylar substrate (relative permittivity of 2.7 and thickness of 65 μm). The frequency response of the surfaces are controlled through the element self-inductance and capacitive coupling with neighbouring elements. This work shows that different arrangements result in the formation of multiple distinct resonances. The theoretical and experimental results were in good agreement where rounded squares and dual element arrays were employed to create broadband and multiband band-stop FSSs. A polarization sensitive surface exhibited stop-bands at 12 and 16 GHz in transverse electric polarization and a stop-band at 14.4 GHz in transverse magnetic polarization. This technique can be applied to any periodic array through careful selection of the individual elements in the array, as well as their arrangement.
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Wang, Jun, Shaobo Qu, Liyang Li, et al. "All-dielectric metamaterial frequency selective surface." Journal of Advanced Dielectrics 07, no. 05 (2017): 1730002. http://dx.doi.org/10.1142/s2010135x1730002x.

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Frequency selective surface (FSS) has been extensively studied due to its potential applications in radomes, antenna reflectors, high-impedance surfaces and absorbers. Recently, a new principle of designing FSS has been proposed and mainly studied in two levels. In the level of materials, dielectric materials instead of metallic patterns are capable of achieving more functional performance in FSS design. Moreover, FSSs made of dielectric materials can be used in different extreme environments, depending on their electrical, thermal or mechanical properties. In the level of design principle, the theory of metamaterial can be used to design FSS in a convenient and concise way. In this review paper, we provide a brief summary about the recent progress in all-dielectric metamaterial frequency selective surface (ADM-FSS). The basic principle of designing ADM-FSS is summarized. As significant tools, Mie theory and dielectric resonator (DR) theory are given which illustrate clearly how they are used in the FSS design. Then, several design cases including dielectric particle-based ADM-FSS and dielectric network-based ADM-FSS are introduced and reviewed. After a discussion of these two types of ADM-FSSs, we reviewed the existing fabrication techniques that are used in building the experiment samples. Finally, issues and challenges regarding the rapid fabrication techniques and further development aspects are discussed.
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Hashemi, Soheil, and Ali Abdolali. "Room shielding with frequency-selective surfaces for electromagnetic health application." International Journal of Microwave and Wireless Technologies 9, no. 2 (2016): 291–98. http://dx.doi.org/10.1017/s1759078716000015.

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Use of frequency-selective surfaces (FSSs) is proposed to shield rooms against electromagnetic fields in order to achieve secure indoor communications and reduce human exposure to external fields. The secure room is designed using two-layer FSSs with an FR4 substrate to cover 10–12 GHz frequency band. Different elements in each layer and shift in the position of elements are the reasons for more than 3 GHz bandwidths in X band. The performance of the structure is also stable versus the misaligned position of layers. An equivalent circuit model is proposed for the structure and results show −20 dB isolation between inside and outside of the room in the desired frequency band. Bio tissue is located inside the cubic structure with FSS walls and the results of the specific absorption rate are demonstrated and compared in two rooms with FSS cover on concrete walls and a room with concrete walls. The 17 × 17 cm2two-layer FSS is fabricated for the measurement and the results are presented. The designed FSS can be used in the construction of wave-isolated room for any application.
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Silva Neto, V. P., M. J. Duarte, and A. G. D’Assunção. "Full-Wave Analysis of Stable Cross Fractal Frequency Selective Surfaces Using an Iterative Procedure Based on Wave Concept." International Journal of Antennas and Propagation 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/401210.

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This work presents a full-wave analysis of stable frequency selective surfaces (FSSs) composed of periodic arrays of cross fractal patch elements. The shapes of these patch elements are defined conforming to a fractal concept, where the generator fractal geometry is successively subdivided into parts which are smaller copies of the previous ones (defined as fractal levels). The main objective of this work is to investigate the performance of FSSs with cross fractal patch element geometries including their frequency response and stability in relation to both the angle of incidence and polarization of the plane wave. The frequency response of FSS structures is obtained using the wave concept iterative procedure (WCIP). This method is based on a wave concept formulation and the boundary conditions for the FSS structure. Prototypes were manufactured and measured to verify the WCIP model accuracy. A good agreement between WCIP and measured results was observed for the proposed cross fractal FSSs. In addition, these FSSs exhibited good angular stability.
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Xue, Wei, Chen Liu, Nan Zhu, and Xiao Xiang He. "Electromagnetic Analysis of Frequency Selective Surfaces Using the SSED Method." Applied Mechanics and Materials 130-134 (October 2011): 1365–69. http://dx.doi.org/10.4028/www.scientific.net/amm.130-134.1365.

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The Simplified sub-entire domain (SSED) basis function method has been introduced and modified to analyze some planar and curved Frequency selective surfaces (FSSs) with finite size. The number of unknowns and memory consumption of the methods are discussed in detail. The reflection coefficients and transmission coefficients are given, which agree well with the reference results.
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D'Elia, Ugo F., Giuseppe Pelosi, Stefano Selleri, and Ruggero Taddei. "A carbon-nanotube-based frequency-selective absorber." International Journal of Microwave and Wireless Technologies 2, no. 5 (2010): 479–85. http://dx.doi.org/10.1017/s1759078710000693.

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A recently developed material based on carbon nanotubes is used here for the realization of single- and double-layered frequency-selective surfaces (FSSs) with relevant absorbing properties. The peculiar characteristics of carbon nanotubes are exploited to devise high-loss resonant ring structures periodically arranged to build the FSS. By introducing two layers of rings, an absorber with stable characteristics over a wide frequency band and over a wide range for the incident wave angle is achieved.
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Guan, Fuwang, Hong Xiao, Meiwu Shi, Weidong Yu, and Fumei Wang. "Realization of planar frequency selective fabrics and analysis of transmission characteristics." Textile Research Journal 87, no. 11 (2016): 1360–66. http://dx.doi.org/10.1177/0040517516652348.

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Based on traditional frequency selective surfaces (FSSs), the research ideas of novel frequency selective fabrics (FSFs) are proposed. In this paper, the specific square-loop patch FSF was chosen as an example to illustrate the design procedures, including ANSYS (HFSS) simulation and numerical calculation methods, and then a computer-based experiment was conducted to develop prototypes. Although the simulation, calculation, and experiment results have minor differences, especially the resonance frequency, they show good consistency overall, which demonstrates that traditional design methods could also apply to 2D FSFs. The experiment transmission curve shows obvious band-stop response, peaking at -37.12 dB at the resonance frequency 11.65 GHz, and the narrow bandwidth of -10 dB is predicted from 10.85 GHz to 12.55 GHz. To further verify the validity of design procedures, two complementary cross-shaped FSFs were fabricated through a computer embroidery process, and the experimental transmission curves are complementary as expected, peaking at -26.05 dB and 0 dB at the same resonance frequency 9.65 GHz, and the narrow bandwidths of -10 dB and -0.5 dB are 1.07 GHz and 0.41 GHz, respectively. Although many problems need to be solved in further research, this convenient fabrication method and theoretical basis could make relevant work feasible in later study.
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Xu, Yuan, and Mang He. "Design of Multilayer Frequency-Selective Surfaces by Equivalent Circuit Method and Basic Building Blocks." International Journal of Antennas and Propagation 2019 (August 14, 2019): 1–13. http://dx.doi.org/10.1155/2019/9582564.

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An equivalent circuit method (ECM) is proposed for the design of multilayer frequency-selective surfaces (FSSs). In contrast to the existing ECMs that were developed mainly for the analysis of the properties of a given FSS, the presented ECM aims at providing the initial design parameters of an FSS from the desired frequency response. In this method, four types of basic FSS structures are used as the building blocks to construct the multilayer FSSs, and their surface impedances in both the normal- and the oblique-incidence situations are studied in detail in order to achieve more accurate equivalent circuit (EC) representation of the entire FSS. For a general FSS design with expected frequency response, the EC parameters and the geometrical sizes of the required basic building blocks can be synthesized from a few typical S-parameter (S11/S12) samplings of the response curves via a simple least-square curve-fitting process. The effectiveness and accuracy of the method are shown by the designs of a band-pass FSS with steep falling edge and a miniaturized band-pass FSS with out-of-band absorption. The prototype of one design is fabricated, and the measured frequency response agrees well with the numerical results of the ECM and the full-wave simulations.
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Dissertations / Theses on the topic "Frequency Selective Surfaces (FSSs)"

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Dewani, Aliya Ashraf. "Flexible Multi-Layer Frequency Selective Surfaces for Radio Secure Environments." Thesis, Griffith University, 2016. http://hdl.handle.net/10072/367902.

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In buildings with multiple occupancy, frequency shielding and re-use methods are required to enhance the spectral efficiency. Passive band stop Frequency Selective Surfaces (FSSs) can be used to improve the electromagnetic architecture of the buildings. This dissertation provides a new approach to the design of spatial filter material (frequency selective surfaces) on a flexible, thin and transparent substrate. The flexibility, transparency and frequency shielding property of these film type structures help them to be deployed on the walls/windows of offices, vehicles, and prisons etc. This technique is a low cost method of confining LAN pico cells in one room. A simple ring FSS of sub wavelength element size (λo/4) can provide transmission stop band at 12.3 GHz. The variation in band stop characteristics was investigated for various wall materials. The centre frequency was varied by more than 3 GHz by common wall materials. A convoluted square loop FSS was developed to miniaturize the FSS element size without changing the unit cell dimensions. The small dimensions of the elements improved the angular stability for incident angles upto 45o. A frequency reduction of 62% was achieved by modifying the traditional square loop FSS. The bandwidth increased from 2 GHz to 8 GHz using double layer FSS configurations. An offset technique was introduced in the bottom layer in order to maximize the mutual coupling between the two layers of the composite FSS structure. A meandered double layer FSS with the unit cell dimensions much smaller than the operating wavelength (λo/22) shifted the stop band frequency from 8 GHz to 1.89 GHz. The densely packed meandered design showed a stable response for the perpendicular (TE) and parallel (TM) polarizations at oblique incidence.<br>Thesis (PhD Doctorate)<br>Doctor of Philosophy (PhD)<br>Griffith School of Engineering<br>Science, Environment, Engineering and Technology<br>Full Text
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Sanz, Fernandez Juan Jose. "Frequency selective surfaces for Terahertz applications." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/7648.

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This thesis presents both theoretical and experimental investigations of the performance and capabilities of frequency selective surfaces (FSS) applied at THz frequencies. The aim is to explore and extend the use of FSS, traditionally limited to microwave frequencies, towards the THz regime of the spectrum, where interesting applications such as imaging, sensing and communications exist. The contribution of this work lies in three main areas within the scope of THz FSS, namely, performance, prototyping and applications. Unlike microwave FSS where extensive research has been performed to evaluate the performance of different FSS designs, particular problems arise at THz frequencies, significantly, the ohmic losses. While a few notable studies can be found on the issue of ohmic losses, part of this thesis investigates, for the first time, the power dissipation due to the presence of both ohmic and dielectric losses, in relation to the power stored in the vicinity of the FSS, the currents induced in the elements of the array and the array’s terminal impedance. By doing so, a better understanding of the performance of THz FSS has been given in terms of their quality factor, allowing for design guidelines previously unavailable. In order to demonstrate multiband operation experimentally, a novel fabrication process has been designed and developed to manufacture capacitive or dipole-based THz FSS on a dielectric layer. Dry deep-reactive ion etching has been employed in order to avoid the use of wet etching to provide better control of etch characteristics. Various FSS operating around 15THz have been demonstrated experimentally. In addition, THz FSS have been investigated theoretically in the realm of three different applications, namely, multiband operation, sensing capability and reconfigurability. Multiband characteristics using single-screen FSS have been achieved by perturbed dipole FSS exhibiting up to four resonances due to the excitation of even and odd current modes. After studying the near-fields in perturbed FSS, it has been found that this type of FSS represent a very attractive candidate for sensing applications due to the revealed near-field enhancement phenomena related to the excitation of the odd mode, where currents flow in opposite directions. Finally, a novel tunability approach to reach frequency reconfigurability by varying the near-field coupling between two closely spaced layers in a dual-layer configuration has been proposed. A MEMS movable four-arm membrane has been suggested to vary the distance between the two layers mechanically, leading to the frequency tuning effect. This approach has been shown to be particularly suitable for THz frequencies, and has been applied to demonstrate theoretically tunable FSS and other periodic structures, such as artificial magnetic conductors and dielectric gratings.
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Moreira, Ricardo C?sar de Oliveira. "Antenas planares integradas com FSSs para aplica??es em sistemas de comunica??es sem fio." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15438.

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Made available in DSpace on 2014-12-17T14:56:05Z (GMT). No. of bitstreams: 1 RicardoCOM_DISSERT.pdf: 2871437 bytes, checksum: ca804782bf10029c3e31983e4917ea6a (MD5) Previous issue date: 2012-04-18<br>Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico<br>This work presents a theoretical and experimental analysis about the properties of microstrip antennas with integrated frequency selective surfaces (Frequency Selective Surface - FSS). The integration occurs through the insertion of the FSS on ground plane of microstrip patch antenna. This integration aims to improve some characteristics of the antennas. The FSS using patch-type elements in square unit cells. Specifically, the simulated results are obtained using the commercial computer program CST Studio Suite? version 2011. From a standard antenna, designed to operate in wireless communication systems of IEEE 802.11 a / b / g / n the dimensions of the FSS are varied to obtain an optimization of some antenna parameters such as impedance matching and selectivity in the operating bands. After optimization of the investigated parameters are built two prototypes of microstrip patch antennas with and without the FSS ground plane. Comparisons are made of the results with the experimental results by 14 ZVB network analyzer from Rohde & Schwarz ?. The comparison aims to validate the simulations performed and show the improvements obtained with the FSS in integrated ground plane antenna. In the construction of prototypes, we used dielectric substrates of the type of Rogers Corporation RT-3060 with relative permittivity equal to 10.2 and low loss tangent. Suggestions for continued work are presented<br>Este trabalho apresenta uma investiga??o te?rica e experimental sobre as propriedades das antenas de microfita integradas com superf?cies seletivas em frequ?ncia (Frequency Selective Surface FSS). A integra??o se d? por meio da inser??o da FSS no plano de terra da antena patch de microfita. Essa integra??o visa a melhoria de algumas caracter?sticas das antenas como, por exemplo, ganho, largura de banda, dentre outras. As FSS utilizam elementos do tipo patch quadrado nas c?lulas unit?rias. Especificamente, os resultados simulados s?o obtidos utilizando-se o programa computacional comercial CST Studio Suite? vers?o 2011. A partir de uma antena padr?o, projetada para operar em sistemas de comunica??es sem fio dos padr?es IEEE 802.11 a/b/g/n, as dimens?es da FSS s?o variadas de forma a obter uma otimiza??o de alguns par?metros da antena, como casamento de imped?ncia e seletividade nas bandas de opera??o. Ap?s a otimiza??o dos par?metros investigados, s?o constru?dos dois prot?tipos de antenas patch de microfita com e sem a FSS no plano de terra. S?o feitas compara??es dos resultados simulados com os resultados experimentais obtidos pelo analisador de rede ZVB 14 da Rohde & Schwarz?. A compara??o visa validar as simula??es efetuadas e mostrar as melhorias obtidas com a FSS integrada no plano de terra da antena. Na constru??o dos prot?tipos, foram utilizados substratos diel?tricos da Rogers Corporation do tipo RT-3060 com permissividade relativa igual a 10,5 e baixa tangente de perdas. Sugest?es de continuidade do trabalho s?o apresentadas
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Silva, Maurício Weber Benjó da 1980. "Superfícies seletivas em frequência - FSS : concepção e projeto de absorvedores planares de micro-ondas para aplicação em WLAN, WIMAX e radar." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261243.

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Orientador: Luiz Carlos Kretly<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Elétrica e de Computação<br>Made available in DSpace on 2018-08-24T13:36:57Z (GMT). No. of bitstreams: 1 Silva_MauricioWeberBenjoda_D.pdf: 10953654 bytes, checksum: 6b4d1b6000f187a807b5cec8ba653713 (MD5) Previous issue date: 2014<br>Resumo: Neste trabalho, as diferentes propriedades de superfícies seletivas em frequência, FSS - Frequency Selective Surfaces, são analisadas. As FSS são estruturas planares com células periódicas e podem ser classificadas como uma classe de metamateriais. Para tanto, o mecanismo de trabalho dessas estruturas foi extensivamente estudado, e um método próprio, baseado no modelo de circuito equivalente em conjunto com simulações de onda completa foi proposto. A ferramenta desenvolvida é útil para uma análise preliminar rápida de FSS, a qual foi utilizada para criar uma base de dados de elementos conhecidos na literatura. Diferente dos modelos de análise clássicos, a modelagem analítica proposta, que é uma das principais contribuições do trabalho, usa um simples algoritmo para aproximar a resposta de superfícies seletivas em frequência com geometrias arbitrárias, para incidências normal e oblíqua e para substratos com quaisquer espessuras. Nesse sentido, após a simulação eletromagnética da estrutura, é possível computar a resposta de uma FSS com diferentes parâmetros sem o consumo de tempo das simulações de onda completa. O modelo usa as características peculiares de superfícies de alta impedância, HIS - High Impedance Surface, que dentro de determina faixa comporta-se como condutor magnético perfeito, PMC - Perfect Magnetic Conductor, enquanto no restante da banda tem comportamento de um condutor elétrico perfeito, PEC - Perfect Electric Conductor, para sintetizar absorvedores finos e planares de micro-ondas. As estruturas, compostas de superfície seletiva em frequência resistivas sobre um substrato dielétrico aterrado, são projetadas visando aplicação em diferentes faixas de frequência de absorção e diferentes larguras de banda. Na faixa de 5,5 GHz, objetivou-se satisfazer as especificações dos sistemas WIMAX, WLAN, com os padrões IEEE 802.11a, bem como sistemas de radar, enquanto sinais de outras faixas podem trafegar com atenuação mínima ou nula. Para a faixa mais elevada, projetou-se uma estrutura que oferece absorção sobre a faixa de frequências de 10 GHz a 18 GHz, que pode ser empregada visando aplicações na banda-X e banda-Ku. O método de modelagem para a FSS e para os absorvedores propostos foi validado fisicamente através de montagens experimentais e instrumentação, especialmente desenvolvidas para estas estruturas. Os protótipos dos absorvedores fabricados são extremamente finos e foram medidos por meio de setups de medida em campo aberto e em câmara anecóica. As estruturas projetadas mostraram excelente desempenho para as faixas medidas, mantendo refletividade tipicamente abaixo de -10 dB ao longo de toda a banda. A metodologia desenvolvida nesta pesquisa pode ser ampliada para diferentes faixas de frequências, larguras de banda e aplicações<br>Abstract: In this work, the different properties of frequency selective surfaces - FSS are analyzed. Frequency selective surfaces are planar structures with periodic cells and can be classified as a kind of metamaterials. To this end, the working mechanism of these structures has been extensively studied, and a proper method based on the equivalent circuit model in conjunction with full-wave simulations was proposed. The developed tool is useful for a fast preliminary analysis of FSS, which was used to create a database of known elements presented in the literature. Unlike of classical analysis model, the proposed analytical modeling, which is one of the main thesis contributions, uses a simple algorithm for approximate the response of frequency selective surfaces with arbitrary shape, for normal and oblique incidence and for substrates with all thicknesses. In this sense, after the electromagnetic simulation of the structure, it is possible to compute the response of an FSS with different parameters without the time consuming full-wave simulations. The model uses the unique characteristics of High-Impedance Surfaces - HIS, which for certain frequency range, behaves as Perfect Magnetic Conductor - PMC, while outside this band behaves as a Perfect Electric Conductor - PEC, for synthesizing thin planar microwave absorbers. The structures, comprising resistive frequency selective surfaces over a grounded dielectric substrate, are designed aiming different absorption frequency bands and different bandwidths. In the 5.5 GHz frequency range, the aim was to satisfy the specifications of WiMAX, WLAN systems, in view of the IEEE 802.11a standards, as well as radar systems, while signals from other bands can travel across with zero or minimal attenuation. To the highest range, the designed structure provides absorption over 10 GHz to 18 GHz frequency range, and can be applied to the X- and Ku- band. The modeling method for the FSS and the proposed absorbers was physically validated through experimental setups and instrumentation, especially developed for these structures. The prototype of the fabricated absorbers are extremely thin and were characterized by using free space and anechoic chamber measurement setups. The designed structures showed excellent performance for measurements ranges, with reflectivity typically below -10 dB over the entire band. The methodology developed in this research can be extended to different frequency bands, bandwidth and applications<br>Doutorado<br>Eletrônica, Microeletrônica e Optoeletrônica<br>Doutor em Engenharia Elétrica
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Nosal, Samuel. "Modélisation electromagnétique de structures périodiques et matériaux artificiels : application à la conception d'un radôme passe-bande." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2009. http://www.theses.fr/2009ECAP0030/document.

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Les surfaces sélectives en fréquence (FSS) pour la furtivité radar ou l’optique ont été largement étudiées. Depuis plus de vingt ans, des matériaux artificiels ont été conçus, permettant d’obtenir des propriétés particulières, notamment l’existence de bandes permises ou interdites, réfraction négative, ultra-réfraction. Par ailleurs, des antennes basées sur la mise en réseau d’un élément rayonnant sont plus compactes et plus facilement intégrables. Le problème de la diffraction d’une onde plane par des réseaux tridimensionnels bipériodiques peut être résolu par éléments finis ou par équations intégrales bipériodiques ; il l’est souvent par une méthode hybride combinant la méthode des éléments finis et la méthode aux équations intégrales. Nous avons choisi de développer une méthode hybride utilisant deux variantes de la méthode aux équations intégrales. Les domaines semi-infinis (l’extérieur du réseau) sont traités par des équations intégrales bipériodiques (EI3D2D), et les domaines bornés (l’intérieur du réseau) sont traités par des équations intégrales tridimensionnelles (EI3D), auxquelles on impose des conditions aux limites de pseudopériodicité. Ce code numérique est développé dans le cadre du code SPECTRE de Dassault-Aviation, qui est un code généraliste 3D, afin de bénéficier de la richesse des modèles qui y ont déjà été développés (modèle composé d’un nombre quelconque de sous-domaines de formes et de matériaux quelconques, traitement des différents cas de jonctions entre sous-domaines, matériaux de faible épaisseur). L’efficacité en termes de précision et en temps de calcul de la méthode numérique est validée par comparaison des résultats avec d’autres simulations numériques et également avec des résultats de mesures. Les cas testés sont représentatifs de plusieurs des principaux phénomènes liés aux métamatériaux : surfaces sélectives en fréquence, transmission « extraordinaire », surfaces à haute impédance. Enfin, nous étudions un radôme passe-bande indépendant à l’angle d’incidence, à l’aide de la méthode numérique que nous proposons. La structure retenue se base sur un réseau de cavités coaxiales dans une couche métallique. Nous expliquons l’origine physique des résonances qui apparaissent et nous suggérons une évolution géométrique du profil des cavités, afin d’augmenter la largeur de bande passante<br>Frequency selective surfaces (FSS) for radar stealth or in optics have been widely studied. For more than two decades, articial materials have been designed to highlight specific behaviour, like the existence of allowed or forbidden bands, negative refraction, ultra-refraction... Moreover, antennas based upon an array of radiating elements improve the compactness and integration of these features. The problem of the diffraction of a plane wave by 3D biperiodic scatterers can be solved by finite-elements methods (FEM) or biperiodic boundary integral equations (BIE). It is often done by hybrid methods, that combine FEM and BIE. We choose to develop a hybrid method that uses two variants of the BIE method. Semiinfinite outer domains are treated by biperiodic integral equations (3D2D IE) and inner bounded domains are treated by 3D free-space integral equations (3D IE). Pseudoperiodic boundary conditions are enforced in the scattering biperiodic structure. The numerical code is developed in the framework of Dassault Aviation’s SPECTRE code, which is a general 3D code, in order to take advantage of the various models that have already been developed : arbitrary number of sub-domains of various shapes or materials, treatment of the different types of junctions between sub-domains, thin slabs. The efficiency in terms of accuracy and computation time of the numerical code is validated by comparison of the results from other numerical simulations or measurements. All the test cases are representative of several of the main phenomena that can be observed in metamaterials : FSS, “extraordinary” transmission, high-impedance surfaces. Finally, a bandpass radome which is independent to the angle of incidence is studied. The proposed numerical method is used. The chosen structure is based upon an array of coaxial cavities in a metallic slab. We explain the physical origin of resonances that appear and we suggest a geometrical evolution of the profile of the cavities, to favor a wideband behavior
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Tchikaya, Euloge Budet. "Modélisation électromagnétique des Surfaces Sélectives en Fréquence finies uniformes et non-uniformes par la Technique de Changement d'Echelle (SCT)." Thesis, Toulouse, INPT, 2010. http://www.theses.fr/2010INPT0100/document.

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Les structures planaires de tailles finies sont de plus en plus utilisées dans les applications des satellites et des radars. Deux grands types de ces structures sont les plus utilisés dans le domaine de la conception RF à savoir Les Surfaces Sélectives en Fréquence (FSS) et les Reflectarrays. Les FSSs sont un élément clé dans la conception de systèmes multifréquences. Elles sont utilisées comme filtre en fréquence, et trouvent des applications telles que les radômes, les réflecteurs pour antenne Cassegrain, etc. Les performances des FSSs sont généralement évaluées en faisant l'hypothèse d'une FSS de dimension infinie et périodique en utilisant les modes de Floquet, le temps de calcul étant alors réduit quasiment à celui de la cellule élémentaire. Plusieurs méthodes permettant la prise en compte de la taille finie des FSSs ont été développées. La méthode de Galerkin basée sur l'approche rigoureuse permet la prise en compte des interactions entre les différents éléments du réseau, mais cette technique ne fonctionne que pour les FSSs de petite taille, typiquement 3x3 éléments. Pour les grands réseaux, cette méthode n'est plus adaptée, car le temps de calcul et l'exigence en mémoire deviennent trop grands. Donc, une autre approche est utilisée, celle basée sur la décomposition spectrale en onde plane. Elle permet de considérer un réseau fini comme un réseau périodique infini, illuminé partiellement par une onde plane. Avec cette approche, des FSSs de grande taille sont simulées, mais elle ne permet pas dans la plupart des cas, de prendre en compte les couplages qui existent entre les différentes cellules du réseau, les effets de bord non plus. La simulation des FSSs par les méthodes numériques classiques basées sur une discrétisation spatiale (méthode des éléments finis, méthode des différences finies, méthode des moments) ou spectrale (méthodes modales) aboutit souvent à des matrices mal conditionnées, des problèmes de convergence numérique et/ou des temps de calcul excessifs. Pour éviter tous ces problèmes, une technique appelée technique par changements d'échelle tente de résoudre ces problèmes. Elle est basée sur le partitionnement de la géométrie du réseau en plusieurs sous-domaines imbriqués, définis à différents niveaux d'échelle du réseau. Le multi-pôle de changement d'échelle, appelé Scale-Changing Networks (SCN), modélise le couplage électromagnétique entre deux échelles successives. La cascade de ces multi-pôles de changement d'échelle, permet le calcul de la matrice d'impédance de surface de la structure complète et donc la modélisation globale du réseau. Ceci conduit à une réduction significative en termes de temps de calcul et d'espace mémoire par rapport aux méthodes numériques classiques. Comme le calcul des multi-pôles de changement d'échelle est mutuellement indépendant, les temps d'exécution peuvent encore être réduits de manière significative en parallélisant le calcul. La SCT permet donc de modéliser des FSSs Finies tout en prenant en compte le couplage entre les éléments adjacents du réseau<br>The finite size planar structures are increasingly used in applications of satellite and radar. Two major types of these structures are the most used in the field of RF design ie Frequency Selective Surfaces (FSS) and the Reflectarrays. The FSSs are a key element in the design of multifrequency systems. They are used as frequency filter, and find applications such as radomes, reflector Cassegrain antenna, etc.. The performances of FSSs are generally evaluated by assuming an infinite dimensional FSS using periodic Floquet modes, the computation time is then reduced almost to that of the elementary cell. Several methods have been developed for taking into account the finite dimensions of arrays. For example the Galerkin method uses a rigorous element by element approach. With this method, the exact interactions between the elements are taken into account but this technique works only for small FSS, typically 3x3 elements. For larger surfaces, this method is no more adapted. The computation time and the memory requirement become too large. So another approach is used based on plane wave spectral decomposition. It allows considering the finite problem as a periodic infinite one locally illuminated. With this approach, large FSS are indeed simulated, but the exact interactions between the elements are not taken into account, the edge effects either. The simulation of FSS by conventional numerical methods based on spatial meshing (finite element method, finite difference, method of moments) or spectral (modal methods) often leads in the practice to poorly conditioned matrices, numerical convergence problems or/and excessive computation time. To avoid these problems, a new technique called Scale Changing Technique attempts to solve these problems. The SCT is based on the partition of discontinuity planes in multiple planar sub-domains of various scale levels. In each sub- omain the higher-order modes are used for the accurate representation of the electromagnetic field local variations while low-order modes are used for coupling the various scale levels. The electromagnetic coupling between scales is modelled by a Scale Changing Network (SCN). As the calculation of SCN is mutually independent, the execution time can still be significantly reduced by parallelizing the computation. With the SCT, we can simulate large finite FSS, taking into account the exact interactions between elements, while addressing the problem of excessive computation time and memory
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Euler, Mattias. "Transpolarizing frequency selective surfaces." Thesis, Queen's University Belfast, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.534744.

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Chang, Teck Keng. "Active frequency selective surfaces." Thesis, University of Kent, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281659.

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Ara?jo, Lincoln Machado de. "An?lise te?rica e experimental de superf?cies seletivas de freq??ncia e suas aplica??es em antenas planares." Universidade Federal do Rio Grande do Norte, 2009. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15294.

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Made available in DSpace on 2014-12-17T14:55:39Z (GMT). No. of bitstreams: 1 LincolnMA.pdf: 1667449 bytes, checksum: b8113389f31903ba22cf94dbc22192c1 (MD5) Previous issue date: 2009-08-13<br>Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico<br>This work presents a theoretical and numerical analysis of structures using frequency selective surfaces applied on patch antennas. The FDTD method is used to determine the time domain reflected fields. Applications of frequency selective surfaces and patch antennas cover a wide area of telecommunications, especially mobile communications, filters and WB antennas. scattering parameters are obteained from Fourier Transformer of transmited and reflected fields in time domain. The PML are used as absorbing boundary condition, allowing the determination of the fields with a small interference of reflections from discretized limit space. Rectangular patches are considered on dielectric layer and fed by microstrip line. Frequency selective surfaces with periodic and quasi-periodic structures are analyzed on both sides of antenna. A literature review of the use of frequency selective surfaces in patch antennas are also performed. Numerical results are also compared with measured results for return loss of analyzed structures. It is also presented suggestions of continuity to this work<br>Este trabalho apresenta uma an?lise te?rica e num?rica de estruturas que utilizam superf?cies seletivas de frequ?ncia aplicadas a antenas do tipo patch. Para isso, ? utilizado o m?todo das diferen?as finitas no dom?nio do tempo (FDTD) visando determinar os campos refletidos a partir de uma onda plana incidente no dom?nio do tempo. As aplica??es das superf?cies seletivas de freq??ncia e antenas patch abrangem uma grande ?rea das Telecomunica??es, principalmente em comunica??es m?veis e v?o desde filtros at? as antenas banda larga. Especificamente, a an?lise usa os campos transmitidos e refletidos obtidos no dom?nio do tempo, em conjunto com transformada de Fourier permitindo a obten??o dos par?metros de transmiss?o da antena. A condi??o de contorno absorvedora utilizada foi a de camada perfeitamente casada (PML), permitindo a determina??o num?rica dos campos com uma quantidade menor de interfer?ncias provenientes de reflex?es nos limites do espa?o discretizado. S?o considerados patches retangulares condutores sobre uma camada diel?trica e alimentados por linha de microfita. Foram analisadas superf?cies seletivas de frequ?ncia peri?dicas e quase peri?dicas tanto no plano de terra quanto no plano do pr?prio patch. ? realizada uma revis?o bibliogr?fica a respeito da utiliza??o de superf?cies seletivas de frequ?ncia em antenas patch. Tamb?m s?o comparados resultados num?ricos e medidos para a perda de retorno das estruturas analisadas. S?o apresentadas, ainda, sugest?es de continuidade para este trabalho
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Chia, Yan Wah. "Radiation from curved (conical) frequency selective surfaces." Thesis, Loughborough University, 1993. https://dspace.lboro.ac.uk/2134/7200.

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The thesis deals with the analysis of a microwave Frequency Selective Surface (FSS) on a conical dielectric radome illuminated by a feed hom located at the base. Two approaches have been adopted to solve this problem. The first approach is to calculate the element currents under the assumption that the surface is locally flat. Consequently, the element current at that locality can be determined by employing Floquet modal analysis. The local incidence has been modelled from the radiation pattern of the source or the aperture fields of the feed. Three types of feed model were used to account for the field illumination on the radome. The transmitted fields from the curved surface are obtained from the sum of the radiated fields due to the equivalent magnetic and electric current sources distributed in each local unit cell of the conical surface. This method treats the interaction of neighbouring FSS elements only. In the second approach the curvature is taken into account by dividing the each element into segments which conform to the curved surface. An integral formulation is used to take into account the interaction of all the elements. The current source in each FSS element from the formulation is solved using the method of moments (MOM) technique. A linear system of simultaneous equations is obtained from the MOM and has been solved using elimination method and an iterative method which employs conjugate gradients. The performance of both methods has been compared with regard to the speed of computations and the memory storage capability. New formulations using quasi static approximations have been derived to account for thin dielectric backing in the curved aperture FSS analysis. Computer models have been developed to predict the radiation performance of the curved(conical) FSS. Experiments were performed in an anechoic chamber where the FSS cone was mounted on a jig resting on a turntable. The measuring setup contained a sweep oscillator that supplied power to a transmitting feed placed at the base of the cone. Amplitude and phase values of the far field radiation pattern of the cone were measured with the aid of a vector network analyser. Cones with different dimensions and FSS element geometries were constructed and the measured transmission losses and radiation patterns compared with predictions.
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Books on the topic "Frequency Selective Surfaces (FSSs)"

1

Munk, Ben. Finite antenna arrays and FSS. John Wiley, 2003.

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Munk, Ben. Frequency Selective Surfaces. John Wiley & Sons, Ltd., 2005.

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Munk, Ben A. Frequency Selective Surfaces. John Wiley & Sons, Inc., 2000. http://dx.doi.org/10.1002/0471723770.

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Munk, Ben A. Frequency Selective Surfaces. John Wiley & Sons, Inc., 2000. http://dx.doi.org/10.1002/0471723770.

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Munk, Ben. Frequency selective surfaces: Theory and design. John Wiley, 2000.

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Vardaxoglou, John C. Frequency selective surfaces: Analysis and design. Research Studies Press, 1997.

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Narayan, Shiv, and Arun Kesavan, eds. Handbook of Metamaterial-Derived Frequency Selective Surfaces. Springer Nature Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-8597-5.

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Narayan, Shiv, B. Sangeetha, and Rakesh Mohan Jha. Frequency Selective Surfaces based High Performance Microstrip Antenna. Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-775-8.

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1948-, Wu T. K., ed. Frequency selective surface and grid array. Wiley, 1995.

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Moore, Colin M. Reconfigurable frequency selective surfaces. 1994.

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Book chapters on the topic "Frequency Selective Surfaces (FSSs)"

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Mohammed Yazeen, P. S., C. V. Vinisha, S. Vandana, M. Suprava, and Raveendranath U. Nair. "Broadbanding Techniques Based on Frequency Selective Surfaces (FSS)." In SpringerBriefs in Electrical and Computer Engineering. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-33-4130-2_5.

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Titaouine, Mohammed, and Henri Baudrand. "Applications of the WCIP Method to Frequency Selective Surfaces (FSS)." In The Wave Concept in Electromagnetism and Circuits. John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119332701.ch3.

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Wang, De Song, Shi-Wei Qu, and Chi Hou Chan. "Frequency Selective Surfaces." In Handbook of Antenna Technologies. Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-4560-44-3_23.

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Wang, De Song, Shi-Wei Qu, and Chi Hou Chan. "Frequency Selective Surfaces." In Handbook of Antenna Technologies. Springer Singapore, 2015. http://dx.doi.org/10.1007/978-981-4560-75-7_23-1.

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Katoch, Kanishka, Naveen Jaglan, Samir Dev Gupta, and Binod Kumar Kanaujia. "Design of Frequency Selective Surface (FSS) Printed Antennas." In Printed Antennas. CRC Press, 2020. http://dx.doi.org/10.1201/9780367420451-12.

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Tong, Xingcun Colin. "Metamaterials Inspired Frequency Selective Surfaces." In Functional Metamaterials and Metadevices. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-66044-8_8.

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Yogesh, N., and Zhengbiao Ouyang. "Metamaterial Frequency Selective Surfaces As Polarizers." In Metamaterials Science and Technology. Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-6441-0_10.

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Khalid, Nur Khalida Binti Abdul, and Fauziahanim Binti Che Seman. "Double Square Loop Frequency Selective Surface (FSS) for GSM Shielding." In Lecture Notes in Electrical Engineering. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07674-4_23.

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Deibel, J. A., H. R. Jones, A. Fosnight, et al. "Flexible Terahertz Metamaterials for Frequency Selective Surfaces." In MEMS and Nanotechnology, Volume 5. Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00780-9_17.

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Ghosh, Saptarshi. "Active Metamaterial Frequency Selective Surface (FSS) Based Tunable Radar Absorbing Structure (RAS)." In Metamaterials Science and Technology. Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-15-8597-5_5-1.

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Conference papers on the topic "Frequency Selective Surfaces (FSSs)"

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Wan, Chenghao, Martin Hafermann, Tae Joon Park, et al. "Tunable Threshold in VO2-based Photonic Devices Enabled by Defect Engineering." In CLEO: Applications and Technology. Optica Publishing Group, 2022. http://dx.doi.org/10.1364/cleo_at.2022.jth6b.5.

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Using ion implantation, we engineered tunable thresholds of optical switches that incorporated frequency-selective surfaces (FSSs) with thin-film VO2. We also used a focused ion beam to selectively control any passband of an FSS-VO2 optical switch.
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Seager, R. D., A. Chauraya, M. Broughton, and J. Bowman. "Towards Conformal Woven Frequency Selective Surfaces (FSS)." In 2015 Loughborough Antennas & Propagation Conference (LAPC). IEEE, 2015. http://dx.doi.org/10.1109/lapc.2015.7366121.

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Miller, Robert O., Jeffrey A. Reed, and Dale M. Byrne. "Equivalent-circuit parameters for infrared-frequency-selective surfaces." In OSA Annual Meeting. Optica Publishing Group, 1993. http://dx.doi.org/10.1364/oam.1993.mv.2.

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Representing the interaction of an electromagnetic wave with a frequency selective surface (FSS) by an equivalent circuit model can yield a first approximation to its spectral response, and hence provide a means for preliminary filter design.
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Seager, R. D., A. Chauraya, J. Bowman, M. Broughton, and N. Nimkulrat. "Fabrication of fabric based Frequency Selective Surfaces (FSS)." In 2014 8th European Conference on Antennas and Propagation (EuCAP). IEEE, 2014. http://dx.doi.org/10.1109/eucap.2014.6902191.

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Sobhy, M. I. "Simulation of frequency selective surfaces (FSS) using 3D-TLM." In 3rd International Conference on Computation in Electromagnetics (CEM 96). IEE, 1996. http://dx.doi.org/10.1049/cp:19960212.

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Rong-Qing Sun, Jing Xie, and Yang-Wei Zhang. "Simulation research of band-pass frequency selective surfaces (FSS) radome." In 2016 Progress in Electromagnetic Research Symposium (PIERS). IEEE, 2016. http://dx.doi.org/10.1109/piers.2016.7734616.

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Kose, Umut, and Mesut Kartal. "Impedance Matching of Microstrip Patch Antennas by Using Frequency Selective Surfaces (FSS)." In 2022 30th Signal Processing and Communications Applications Conference (SIU). IEEE, 2022. http://dx.doi.org/10.1109/siu55565.2022.9864680.

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"Single Layer Double Square Loop Frequency Selective Surfaces (FSS) for Wideband Absorption." In 2021 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE). IEEE, 2021. http://dx.doi.org/10.1109/apace53143.2021.9760552.

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Kaur, Komalpreet, and Amanpreet Kaur. "Frequency selective surfaces (FSS) for S and X band shielding in electromagnetic applications." In AGRIVOLTAICS2021 CONFERENCE: Connecting Agrivoltaics Worldwide. AIP Publishing, 2022. http://dx.doi.org/10.1063/5.0106584.

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Silva, M. W. B., Luiz Carlos Kretly, and Silvio E. Barbin. "Practical guidelines for the design and implementation of microwave absorber using FSS-frequency selective surfaces." In 2014 20th International Conference on Microwaves, Radar, and Wireless Communications (MIKON). IEEE, 2014. http://dx.doi.org/10.1109/mikon.2014.6899866.

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Reports on the topic "Frequency Selective Surfaces (FSSs)"

1

Sipus, Zvonimir, Marko Bosiljevac, and Sinisa Skokic. Analysis of Curved Frequency Selective Surfaces. Defense Technical Information Center, 2008. http://dx.doi.org/10.21236/ada503267.

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Mittra, R. Millimeter and Submillimeter Waves and Frequency Selective Surfaces. Defense Technical Information Center, 1988. http://dx.doi.org/10.21236/ada191511.

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Daly, James. Final report for Frequency selective surfaces for rugged thermophotovoltaic emitters. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/808063.

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S.J. Spector, D.K. Astolfi, S.P. Doran, T.M. Lyszczarz, and J.E. Raynolds. Infrared Frequency Selective Surfaces Fabricated using Optical Lithography and Phase-Shift Masks. Office of Scientific and Technical Information (OSTI), 2001. http://dx.doi.org/10.2172/821683.

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Wendt, Joel Robert, G. Ronald Hadley, Sally Samora, et al. Transmissive infrared frequency selective surfaces and infrared antennas : final report for LDRD 105749. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/974868.

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Ryan T. Kristensen, John F. Beausang, and David M. DePoy. Frequency Selective Surfaces as Near Infrared Electro-Magnetic Filters for Thermophotovoltaic Spectral Control. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/822277.

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