Journal ArticleDOI
Quasi-static effective permittivity of periodic composites containing complex shaped dielectric particles
Feng Wu,K.W. Whites +1 more
Reads0
Chats0
TLDR
In this article, a methodology for computing the quasi-static effective permittivity of a two-dimensional or three-dimensional (3-D) lattice of dielectric particles is described.Abstract:
A methodology is described for computing the quasi-static effective permittivity of a two-dimensional (2-D) or three-dimensional (3-D) lattice of dielectric particles. The particles in this composite material may have complicated shapes. This methodology uses a moment method based technique to determine the electric dipole moments of the particles immersed in a uniform electric field. The effective permittivity is then obtained using an appropriate macroscopic model. With this methodology, the mutual interaction between particles can be accounted for accurately. The computed effective permittivity for round cylinders and spheres suspended in a host are compared with our previous T-matrix method results as well as the Maxwell Garnett (MG) formula predictions. Three additional examples involving square (2-D), rounded square (2-D), and spherical (3-D) dielectric inclusions are also given, illustrating the shape effects on the computation of the quasi-static effective permittivity. While the square- and cubic-shaped particles can possess great mutual interaction, surprisingly their effective permittivity is well predicted for all volume fractions by the simple MG formula in both 2-D and 3-D problems.read more
Citations
More filters
Journal ArticleDOI
Generalized constitutive relations for metamaterials based on the quasi-static Lorentz theory
TL;DR: In this article, the elements of the generalized matrix representation of the macroscopic constitutive relations for a three-dimensional array of non-magnetic inclusions with arbitrary shape were derived based on the quasi-static Lorentz theory and the inclusions were represented by electric and magnetic dipole moments.
Journal ArticleDOI
Polarizabilities of platonic solids
TL;DR: In this paper, a numerical effort was made to determine the dielectric polarizabilities of the five regular polyhedra: tetrahedron, cube, octahedron and dodecahedron.
Journal ArticleDOI
Permittivity of woven fabrics: A comparison of dielectric formulas for air-fiber mixture
Kausik Bal,V. K. Kothari +1 more
TL;DR: In this paper, the dispersion of values given by different mixing equations lies between 2.028 and 2.400 at the low fiber volume fraction which is typical for any woven fabric, and an extrapolation technique using a quadratic equation also gives a reasonable value.
Journal ArticleDOI
Homogenization of 3-D Periodic Bianisotropic Metamaterials
TL;DR: In this article, a novel homogenization technique combining an asymptotic multiscale method with wave-field conception is proposed for computing the quasi-static effective parameters of three-dimensional lattices of general bianisotropic composite materials.
Journal ArticleDOI
Complex dielectric constant of sea foam at microwave frequencies
TL;DR: In this article, the applicability of a group of mixing rules for obtaining the dielectric constant (permittivity) of sea foam (whitecaps) at microwave frequencies, 1.4 to 37 GHz, was investigated.
References
More filters
Journal ArticleDOI
A Variational Approach to the Theory of the Effective Magnetic Permeability of Multiphase Materials
Z. Hashin,S. Shtrikman +1 more
TL;DR: In this article, the authors established and applied variational theorems for the derivation of bounds for the effective magnetic permeability of macroscopically homogeneous and isotropic multiphase materials.
Journal ArticleDOI
LVI. On the influence of obstacles arranged in rectangular order upon the properties of a medium
TL;DR: The influence of obstacles arranged in rectangular order upon the properties of a medium was discussed in this article, where it was shown that obstacles can be arranged in a rectangular order to improve the performance of the medium.
Book
Electromagnetic mixing formulas and applications
TL;DR: In this article, the mathematical analysis of macroscopic dielectric and magnetic properties of geophysical, biological and other materials, including special reference to chiral and nonlinear material, the effects of structure and anistrophy are discussed in detail.
Journal ArticleDOI
Effective permittivity of dielectric mixtures
Ari Sihvola,Jin Au Kong +1 more
TL;DR: In this paper, the electric field inside the scatterers is determined by quasi-static analysis, assuming the diameter of the inclusion particles to be much smaller than one wavelength, and the resulting mixing formula is nonlinear and is suitable for iterative solutions.
Book
Singular Electromagnetic Fields and Sources
TL;DR: In this article, the authors present a list of symbols and distributions of delta functions, including the 6-function, the 3-dimensional delta function, the 4-function and the 5-function.
Related Papers (5)
A Variational Approach to the Theory of the Effective Magnetic Permeability of Multiphase Materials
Z. Hashin,S. Shtrikman +1 more