Open AccessJournal Article
An Overview of Equivalent Circuit Modeling Techniques of Frequency Selective Surfaces and Metasurfaces
TLDR
In this paper, a circuit analysis of frequency selective surfaces is reviewed with the aim to underline range of validity of different models and their advantages in terms of simplicity and physical insight.Abstract:
Circuit analysis of frequency selective surfaces is reviewed with the aim to underline range of validity of different models and their advantages in terms of simplicity and physical insight. The circuit approach is based on an equivalent representation of the FSSs with series or shunt connections of inductances and capacitances. Dense non-resonant periodic surfaces (i.e.: grid or patch arrays) can be analyzed analytically by computing the values of inductors or capacitors via the homogenization theory. As the lattice period increases with respect to the operating wavelength or the element shape becomes resonant, a fully analytical circuital approach fails, in particular, in the presence of thin substrates. However, simple circuit approaches can still be employed by deriving lumped parameters values via a quick pre-processing and then generalizing them. The results are accurate up to the resonant frequency region of the element. By including an additional lumped element it is possible, taking into account the effect of the first high order Floquet harmonic. The multi-mode formulation is also able to catch the highly nonlinear response of FSS screens in the grating lobe region provided that the current profile of the element does not change significantly.read more
Citations
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TL;DR: In this article, a substrate-superstrate printed antenna geometry which allows for large antenna gain is presented, asymptotic formulas for gain, beamwidth, and bandwidth are given, and the bandwidth limitation of the method is discussed.
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Low-Profile Wideband Metasurface Antennas Using Characteristic Mode Analysis
Feng Han Lin,Zhi Ning Chen +1 more
TL;DR: In this article, a metasurface (MTS) antenna is proposed for low-profile and wideband operation based on characteristic mode analysis (CMA), where an MTS radiator formed by a diamond-slotted patch is fed by a microstrip line at its bottom through a slot centered on a ground plane.
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Frequency Selective Surfaces: A Review
TL;DR: In this article, the authors provide an overview of basic concepts, types, techniques, and experimental studies of the current state-of-the-art Frequency Selective Surfaces (FSSs).
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Electromagnetic Characterisation of Materials by Using Transmission/Reflection (T/R) Devices
TL;DR: An overview of transmission/reflection-based methods for the electromagnetic characterisation of materials is presented in this article, which is applicable to conventional transmission reflection devices such as coaxial cables or waveguides.
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A Depolarizing Chipless RF Label for Dielectric Permittivity Sensing
Filippo Costa,Antonio Gentile,Simone Genovesi,Luca Buoncristiani,Antonio Manuel Lazaro,Ramon Villarino,David Girbau +6 more
TL;DR: In this paper, a novel depolarizing chipless radio-frequency identification tag is employed to estimate the variation of the dielectric properties of materials, and the tag, comprising two 45° tilted dipoles printed on a thin substrate, is accommodated on top of the target material, and it is interrogated wirelessly at radio frequency with a narrowband signal.
References
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Book
Frequency Selective Surfaces: Theory and Design
TL;DR: In this article, the authors present a comparison of band-pass and Dichroic filter designs for one and two-dimensional periodic structures, and present an overview of the current state-of-the-art.
Journal ArticleDOI
An Overview of the Theory and Applications of Metasurfaces: The Two-Dimensional Equivalents of Metamaterials
Christopher L. Holloway,Edward F. Kuester,Joshua A. Gordon,John F. O'Hara,James C. Booth,David R. Smith +5 more
TL;DR: Metamaterials are typically engineered by arranging a set of small scatterers or apertures in a regular array throughout a region of space, thus obtaining some desirable bulk electromagnetic behavior as mentioned in this paper.
Journal ArticleDOI
Taming the blackbody with infrared metamaterials as selective thermal emitters.
Xianliang Liu,Talmage Tyler,Tatiana Starr,Anthony F. Starr,Nan Marie Jokerst,Willie J. Padilla +5 more
TL;DR: This Letter demonstrates, for the first time, selective thermal emitters based on metamaterial perfect absorbers and finds that emissivity and absorptivity agree very well as predicted by Kirchhoff's law of thermal radiation.