Engineering, Modeling and Testing of Composite Absorbing Materials for EMC Applications

Koledintseva, Marina Y.; Rozanov, Konstantin N.; Drewniak, James L.

doi:10.5772/14884

Cited by 9 publications

(3 citation statements)

References 60 publications

(53 reference statements)

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“…Various optimization procedures, e.g., a genetic algorithm [42][43][44], or a curve-fitting based on the non-linear regression analysis [45], are typically employed in order to extract the frequency dependent Debye model based on composite geometrical parameters. However, in general, these procedures are not very efficient, since they are time-and memory-consuming, need special skills to work with those optimization procedures, and sometimes accuracy of the fit depends on the initial guess for the search pool parameters.…”

Section: Description Of the Analytical Proceduresmentioning

confidence: 99%

Homogenized Permittivity of Composites With Aligned Cylindrical Inclusions for Causal Electromagnetic Simulations

Paulis¹,

Nişanci²,

Koledintseva³

et al. 2012

PIER B

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Abstract-The paper gives an analytical transition from the Maxwell Garnett model of a biphasic mixture (dielectric host and dielectric or conducting inclusions) to the parameters of a singleor double-term Debye representation of the material frequency response. The paper is focused on modeling biphasic mixtures containing cylindrical inclusions. This is practically important for engineering electromagnetic absorbing composite materials, for example, containing carbon fibers. The causal Debye representation is important for incorporation of a composite material in numerical electromagnetic codes, especially time-domain techniques, such as the finite-difference time-domain (FDTD) technique. The equations derived in this paper are different for different types of host and inclusion materials. The corresponding cases for the typical combinations of host and inclusion materials are considered, and examples are provided. The difference between the original Maxwell Garnett model and the derived Debye model is quantified for validating the proposed analytical derivation. It is demonstrated that in some cases the derived equivalent Debye model well approximates the frequency characteristics of the homogeneous model based on the MGA, and in some cases there is an exact match between Debye and Maxwell Garnett models.

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Section: Description Of the Analytical Proceduresmentioning

confidence: 99%

Homogenized Permittivity of Composites With Aligned Cylindrical Inclusions for Causal Electromagnetic Simulations

Paulis¹,

Nişanci²,

Koledintseva³

et al. 2012

PIER B

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“…Electromagnetic composite materials have a number of promising applications in various radio-frequency (RF), microwave and high-speed digital electronic devices, and allow for solving problems related to electromagnetic compatibility (EMC) and electromagnetic immunity (EMI) [1]. For this reason, study and prediction of frequency-dependent radiofrequency RF and microwave properties of materials currently attract much attention.…”

Section: Introductionmentioning

confidence: 99%

Frequency-Dependent Effective Material Parameters of Composites as a Function of Inclusion Shape

Rozanov¹,

Koledintseva²,

Yelsukov³

2012

Composites and Their Properties

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“…Composite thin sheet materials containing magnetic inclusions can be effectively used for electromagnetic noise-suppressing purposes and for solving numerous electromagnetic compatibility and immunity problems [1][2][3][4]. For example, thin absorbing magneto-dielectric layers suppress common-mode currents on extended structures, such as power cords, cables, or edge-coupled microstrip lines.…”

Section: Introductionmentioning

confidence: 99%

Attenuation in Extended Structures Coated With Thin Magneto-Dielectric Absorber Layer

Koledintseva¹,

Razmadze²,

Gafarov³

et al. 2011

PIER

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Abstract-Thin absorbing layers containing magnetic alloy or ferrite inclusions can be effectively used for attenuating common-mode currents on extended structures, such as power cords, cables, or edgecoupled microstrip lines. An analytical model to evaluate attenuation on the coaxial line with the central conductor coated with a magnetodielectric layer is proposed and validated by the experiments and numerical modeling. The analytical model is validated using available magneto-dielectric samples of different thicknesses. This model can serve for comparing and predicting the absorptive properties of different samples of magneto-dielectric materials, whose compositions may be unknown, but dielectric and magnetic properties can be determined by independent measurements over the specified frequency ranges. From modeling the absorption in a coaxial line with a wrapped central conductor, it could be concluded whether it is reasonable to use this particular material in such applications as a shield on an Ethernet or other cable, for reducing potential common-mode currents and unwanted radiation in the frequency range of interest.

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Engineering, Modeling and Testing of Composite Absorbing Materials for EMC Applications

Cited by 9 publications

References 60 publications

Homogenized Permittivity of Composites With Aligned Cylindrical Inclusions for Causal Electromagnetic Simulations

Homogenized Permittivity of Composites With Aligned Cylindrical Inclusions for Causal Electromagnetic Simulations

Frequency-Dependent Effective Material Parameters of Composites as a Function of Inclusion Shape

Attenuation in Extended Structures Coated With Thin Magneto-Dielectric Absorber Layer

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