منابع مشابه
Complex effective permittivity of a lossy composite material
In recent work, boundary integral equations and finite elements were used to study the ~real! effective permittivity for two-component dense composite materials in the quasistatic limit. In the present work, this approach is extended to investigate in detail the role of losses. We consider the special but important case of the axisymmetric configuration consisting of infinite circular cylinders...
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The ability to control the frequency at which a dielectric material exhibits maximum loss (the relaxation frequency) is of interest in telecommunications and radar absorption. A theoretical investigation of the behaviour of the complex bulk permittivity of a composite material with coated, spheroidal filler particles is presented. In the model, the filler particles are replaced mathematically b...
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We investigate the feasibility of quantifying properties of a composite dielectric material through the reflectance, where the permittivity is described by the Lorentz model in which an unknown probability measure is placed on the model parameters. We summarize the computational and theoretical framework (the Prohorov Metric Framework) developed by our group in the past two decades for nonparam...
متن کاملDerivation of Homogeneous Permittivity of Composite Materials with Aligned Cylindri- Cal Inclusions for Causal Electromagnetic Simulations
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 electromagne...
متن کاملA Generalized Approach for Measuring the Dielectric Properties of Lossy Composite Materials
A generalized technique is presented to measure the dielectric properties of lossy composite materials. The overall method is based on measuring the spectral domain reflection and transmission coefficients of the material-under-test (MUT) using a Vector Network Analyzer (VNA), and then finding the dielectric properties of MUT from the measured scattering data using a proposed reconstruction alg...
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 1998
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.366725