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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Journal ArticleDOI
A novel approach to determine the plasma frequency for wire media
TL;DR: In this article, a generalized analytical approach based on quasi-static analysis has been done and compared with previously reported results to determine the plasma frequency of wire media, and the results of different techniques are compared to establish the efficacy of the loss-factor method supported by experimental results.
Journal ArticleDOI
Study of a microstrip antenna on anisotropic metamaterials
TL;DR: In this article, the annular ring microstrip antennas on metamaterial substrates were modeled and analyzed using full-wave analysis in conjunction with Ansoft HFSSTM, and the influence of the permeability tensor of the split ring resonator medium on the resonant characteristics of the antenna was considered.
Proceedings ArticleDOI
Magnetic nanoparticles for tunable microwave metamaterials
TL;DR: In this article, the authors explore alternative methods based on use of magnetic nanoparticles, such as magnetic particles, which can allow permeability of a composite to be tuned from negative to positive at the range of magnetic resonance.
Journal ArticleDOI
An octagonal split ring resonator-based double negative metamaterial for S-, X- and Ku-band applications:
Ismatul N Idrus,M. R. I. Faruque,Sabirin Abdullah,Mohammad Tariqul Islam,Mayeen Uddin Khandaker,Jamel Nebhen +5 more
TL;DR: In this paper, a miniaturised double negative metamaterial with a lower resonance frequency was proposed, which is a combination of a multi-circular ring connected with octagonal shape ring.
Dielectric resonator fabrication and assembly methods for terahertz metamaterials
TL;DR: Gatesman et al. as discussed by the authors submitted a DISSERTATION SUBMITTED TO the FACULTY OF DEPARTMENT OF PHYSICS in PARTIAL FULFILLMENT OF the REQUIREMENTS for the degree of DOCTOR OF PHILOSOPHY PHYSIC UNIVERSITY OF MASSACHUSETTS.
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).
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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.