Analysis of multilayer frequency selective surfaces on periodic and anisotropic substrates

Fallahi, Arya; Mishrikey, Matthew; Hafner, Christian; Vahldieck, R.

doi:10.1016/j.metmat.2009.04.001

Cited by 22 publications

(16 citation statements)

References 18 publications

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“…In spectral domain, the Green's function matrix is indeed an impedance matrix which can be calculated using the following equation [18]: where and are input admittance matrices looking upward and downward respectively. The admittance matrix is defined as (18) where, for example is a vector consisting of Fourier coefficients of in basis. For a homogeneous medium, the spectral domain immittance approach can easily be applied to compute the input admittance matrix [29].…”

Section: Green's Function Matrixmentioning

confidence: 99%

“…They are defined as (20) The formulas to calculate the induction matrices and for isotropic, anisotropic, electrically or magnetically periodic media are reported in [27] and [18].…”

Section: Green's Function Matrixmentioning

confidence: 99%

“…However, these substrates are rarely used because of manufacturing difficulties. Recently another idea for engineering substrates based on introducing periodic inhomogeneity was proposed [18], [19] which is easily manufacturable. For example, drilling holes in the substrate and/or filling them with other materials changes the effective permittivity or permeability of the substrate.…”

Section: Introductionmentioning

confidence: 99%

“…In [18] method of moment/transmission line (MoM/TL) procedure is introduced for the analysis of FSS with so-called periodic substrates. The method took advantage of sub-domain rooftop basis and test functions to expand the excited currents on the patches.…”

Section: Introductionmentioning

confidence: 99%

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Analysis of Frequency Selective Surfaces on Periodic Substrates Using Entire Domain Basis Functions

Yahaghi

Fallahi

Abiri

et al. 2010

IEEE Trans. Antennas Propagat.

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The paper presents an efficient procedure to utilize the existing method of moments/boundary integral-resonant mode expansion approach for the analysis of frequency selective surfaces printed on periodic and inhomogeneous substrates. The Green's function matrix of the structure is obtained using a multiconductor transmission line model. The resulting series equations are solved by using the periodic method of moments with entire domain functions as both basis and test functions. The required entire domain functions are extracted using boundary integral-resonant mode expansion. The Fourier coefficients of the basis functions are evaluated from the coupling integrals by applying a coordinate transformation. Some examples are analyzed and compared to measurement data. To illustrate the excellent convergence of the method, a comparison between using entire domain and sub-domain functions is made. It is shown that by using the proposed approach not only the number of required basis functions reduces but also lower truncation orders in the Fourier expansions need to be considered. This leads to a drastic reduction of the computation time.Index Terms-Boundary integral resonant mode expansion, entire domain basis functions, frequency selective surfaces, method of moments, multiconductor transmission lines method, periodic structures, spectral domain analysis.

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Section: Green's Function Matrixmentioning

confidence: 99%

“…They are defined as (20) The formulas to calculate the induction matrices and for isotropic, anisotropic, electrically or magnetically periodic media are reported in [27] and [18].…”

Section: Green's Function Matrixmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Analysis of Frequency Selective Surfaces on Periodic Substrates Using Entire Domain Basis Functions

Yahaghi

Fallahi

Abiri

et al. 2010

IEEE Trans. Antennas Propagat.

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“…They are usually constructed from periodically spaced apertures or strips that provide the spatial filtering characteristics . Because of their frequency selective behavior, FSSs have found many filtering applications in microwave and millimeter‐wave engineering, such as in reflector antennas, radome design, polarizers, and beam splitters …”

Section: Introductionmentioning

confidence: 99%

Electromagnetic wave characteristics of composite frequency selective surfaces with patch‐grid‐patch type structure fabricated by e‐beam deposition

2019

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In this study, a new method of fabricating a composite frequency selective surface (FSS) using an e‐beam evaporator is proposed. The FSS is designed and fabricated as a part of the structure surface. A new concept of FSSs integrated into a composite skin structure provides a design that is electrically and structurally effective. This manufacturing process has the advantage of direct application of FSS function in a real structural surface with varied conformal skin. The multilayered FSSs of the patch‐grid‐patch type consist of a copper layer as a capacitive or inductive surface on a glass/epoxy pre‐impregnated (prepreg) substrate. The copper layer forming the FSS is manufactured using the e‐beam deposition on a glass/epoxy prepreg. The bandwidth of the designed FSS increases three times. The difference between the simulated and the measured results is due to the different evanescent wave interactions between the capacitive layers and inductive layer such as the local misalignment of the patch and grid, size of the specimen, and change in the thickness of the dielectric substrate after the manufacturing process. The bandwidth is successfully modified by correcting the design parameters such as the period, patch gap, grid width, and dielectric thickness. The band‐pass filtering and skirt characteristics appear in the experimental results, which agree well with the simulated results. This method is remarkably simple, and the manufactured FSS can function as both a structural skin and an FSS. Moreover, it has the merit of manufacturing simplicity and realization of structural shape.

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Microwave absorption enhancement of rectangular activated carbon fibers screen composites

Zang

Xia

et al. 2015

Composites Part B: Engineering

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Analysis of multilayer frequency selective surfaces on periodic and anisotropic substrates

Cited by 22 publications

References 18 publications

Analysis of Frequency Selective Surfaces on Periodic Substrates Using Entire Domain Basis Functions

Analysis of Frequency Selective Surfaces on Periodic Substrates Using Entire Domain Basis Functions

Electromagnetic wave characteristics of composite frequency selective surfaces with patch‐grid‐patch type structure fabricated by e‐beam deposition

Microwave absorption enhancement of rectangular activated carbon fibers screen composites

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