Journal ArticleDOI
Direct calculation of permeability and permittivity for a left-handed metamaterial
TLDR
In this article, an electromagnetic metamaterial was fabricated and demonstrated to exhibit a "left-handed" (LH) propagation band at microwave frequencies, a situation never observed in naturally occurring materials or composites.Abstract:
Recently, an electromagnetic metamaterial was fabricated and demonstrated to exhibit a “left-handed” (LH) propagation band at microwave frequencies. A LH metamaterial is one characterized by material constants—the permeability and permittivity—which are simultaneously negative, a situation never observed in naturally occurring materials or composites. While the presence of the propagation band was shown to be an inherent demonstration of left handedness, actual numerical values for the material constants were not obtained. In the present work, using appropriate averages to define the macroscopic fields, we extract quantitative values for the effective permeability and permittivity from finite-difference simulations using three different approaches.read more
Citations
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Book ChapterDOI
Recent Advances in Finite Integration Technique for High Frequency Applications
Rolf Schuhmann,Thomas Weiland +1 more
TL;DR: The novel developments which are proposed in this paper cover both the basic geometrical modeling in space and time and advanced methods to solve the algebraic problems in time and frequency domain.
Journal ArticleDOI
Analysis of Single-Cell Modeling of Periodic Metamaterial Structures
TL;DR: In this paper, a comparison of two approaches to analyze the periodic arrays of left-handed metamaterials by field simulations in a single unit cell is presented, and the authors show how these results can be transformed into each other, and present a quantitative analysis of the impact of higher order modes on the effective array properties.
Journal ArticleDOI
Effective negative refractive index of graded granular composites with metallic magnetic particles
Zhi-Fang Sang,Zhen-Ya Li +1 more
TL;DR: In this article, the effective refractive index of a granular composite with graded metallic magnetic particles randomly embedded in a host matrix is investigated based on differential effective dipole approximation (DEDA) and Clausius-Mossotti relation.
Journal ArticleDOI
Microwave properties of ferromagnetic composites and metamaterials
TL;DR: Lebourgeois et al. as mentioned in this paper presented a new ferromagnetic composites for radio-frequency applications, based on three topologies of composites: laminate, wire and sphere composites.
Journal ArticleDOI
Error correction for diffraction and multiple scattering in free-space microwave measurement of materials
TL;DR: In this article, a calibration procedure based on the 16-term error model, which removes the need for time gating by correcting for both multiple scattering and diffraction, is developed.
References
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Journal ArticleDOI
The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
Journal ArticleDOI
Magnetism from conductors and enhanced nonlinear phenomena
TL;DR: In this paper, it was shown that microstructures built from nonmagnetic conducting sheets exhibit an effective magnetic permeability /spl mu/sub eff/, which can be tuned to values not accessible in naturally occurring materials.
Journal ArticleDOI
Composite Medium with Simultaneously Negative Permeability and Permittivity
TL;DR: A composite medium, based on a periodic array of interspaced conducting nonmagnetic split ring resonators and continuous wires, that exhibits a frequency region in the microwave regime with simultaneously negative values of effective permeability and permittivity varepsilon(eff)(omega).
Journal ArticleDOI
Effective response functions for photonic bandgap materials
TL;DR: In this article, an effective description for a metalodielectric photonic bandgap (PBG) material was developed for a semi-infinite and slab observables.