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
Resonance properties of metallic ring systems
TL;DR: In this paper, a matrix-form circuit equation was proposed to calculate the frequencies and current distributions for all resonance modes in a ring system and the circuit equations can be analytically solved in the thin-wire limit.
Journal ArticleDOI
Transparent dual band antenna with μ-negative material loading for smart devices
Arpan Desai,Trushit Upadhyaya +1 more
Journal ArticleDOI
Modelling and validation of microwave LPF using modified rectangular split ring resonators (SRR) and defected structures
TL;DR: In this article, a modified rectangular split ring resonator (SRR) is proposed to act as a unit cell of metamaterials for low-pass filter (LPF).
Journal ArticleDOI
Cloaking and Holography Experiments Using Immersive Boundary Conditions
Nele Börsing,Theodor S. Becker,Andrew Curtis,Dirk-Jan van Manen,Thomas Haag,Johan O. A. Robertsson +5 more
TL;DR: In this article, acoustic sources on closed surfaces have their responses calculated and fed back in real time, to suppress forward and backward scattering from objects without prior knowledge of the incident wave field.
Journal ArticleDOI
Design of High-Gain and Beam Steering Antennas Using a New Planar Folded-Line Metamaterial Structure
TL;DR: In this article, a planar folded-line left-handed metamaterial (FL-LHM) was proposed to improve the gain of three 5.8 GHz microstrip antenna types: a circularly polarized patch antenna, an antenna array, and a beam steering antenna.
References
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Journal ArticleDOI
The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
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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.
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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.