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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Proceedings ArticleDOI
Optimum design and fabrication of volumetric graded substrate for a broad band miniature antenna
TL;DR: In this paper, a full wave FEA and the SIMP design method were combined to achieve a 250% improvement for a probe fed patch antenna through the design of only the dielectric substrate while the size is kept constant.
Proceedings ArticleDOI
Coplanar waveguide transmitting a left-handed wave
TL;DR: In this paper, a new version of a coplanar waveguide that transmits a left-handed wave has been presented, and the equivalent circuit of the line unit cell has been derived from the shape of the layout.
Journal ArticleDOI
A miniaturized planar nonbianisotropic left-handed metamaterial
TL;DR: In this paper, a miniaturized non-bianisotropic left-handed metamaterial composed of spiral-S-shaped resonator and conducting wire is proposed This symmetrical structure avoids bianisotropy and it shows a controllable low-loss double negative (DNG) band.
Dissertation
Design of Compact Zeroth-Order Resonant Antenna Based on CRLH TL
TL;DR: In this article, an asymmetric compact coplanar waveguide (ACPW)-fed zeroth-order resonant (ZOR) antenna is designed on a single layer where vias are used.
Journal ArticleDOI
Broadband and compact double negative composite metamaterials with low losses
TL;DR: In this paper, two novel left-handed composite metamaterials consisting of SRRs, wire and single sided S-shaped resonators are proposed for a much broader negative refraction passband.
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.