Two Layer Magnetodielectric Metamaterial with Enhanced Dielectric Constant as a New Ferrite Like Material

Abstract

In this study, we present large enhancement of effective dielectric constant of magnetodielectric metamaterials made from two layers of parallel periodic non-magnetized iron wires embedded inside dielectric (wax), in two orientations of them, relative to the incident electromagnetic field. This kind of enhancement is predicted by finite difference time domain (FDTD) method electromagnetic simulations made for infinite size metamaterials of same unit cell and same electromagnetic wave's geometry of incidence. In this model, the complex internal constants were estimated from the calculated complex S-parameters by using Ross-Nicolson method. The validity of our prediction was tested, from comparison of calculated S-parameters with experimental ones measured on a sample made by rapid prototyping, using a modified strip transmission line method. The dielectric enhancement was found to be about 500%, as it was expected from simulations. Applicability of this family of metamaterials to ferrites like applications is discussed.

Effective longitudinal magnetic response of magnetic metamaterial in the GHz frequencies

“…The magnetized ferrite like inclusions are especially important due to their possible application in creation of artificial ferrites (Zouganelis and Rybin, 2006;Rybin, 2011;Kern et al, 2005). This is because the desirable properties of conventional ferrites are seriously degraded for frequency about 1 GHz (Kern et al, 2005).…”

“…This is because the desirable properties of conventional ferrites are seriously degraded for frequency about 1 GHz (Kern et al, 2005). Zouganelis and Rybin (2006) and Rybin (2011) are mostly related to the study of the effective properties in the directions transverse to bias while the effective magnetic properties in the directions of bias is the object of study of this paper. So, in this paper, we obtain the expressions for the effective relative permeability for two-component composite as a host dielectric material with periodically embedded cylindrical and spherical metal ferric inclusions saturated with a biasing magnetic field in the microwave frequency range.…”

Effective dielectric constant and design of sliced Lüneberg lens

“…We calculate the dielectric constants in all geometries by using the NR method, following the methodology described in Ref. 7 and the references therein. The calculated effective constants are presented in Figure 4.…”

“…The estimated values of dielectric constants are compared with ones found from finite difference time domain (FDTD) method electromagnetic simulations for infinite periodic lattice of hemispherical and cylindrical air-holes embedded in a dielectric slab, using Nicolson-Ross (NR) method [7].…”

Unusual microwave effective properties of two-component metaferrites

“…The study of the effective properties of artificial dielectrics, or so-called metamaterials, in the microwave frequencies has been of significant interest within the past two decades [1][2][3][4][5][6][7][8][9][10][11]. This is mostly due to unusual properties that, e.g., negative values in the real part of effective refractive index [4,12] or low values in the real part of it [13].…”