Journal ArticleDOI
Volumetric negative-refractive-index metamaterials based upon the shunt-node transmission-line configuration
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TLDR
In this paper, a volumetric negative-refractive-index transmission line (NRI-TL) metamaterial was proposed, which can effectively couple incident plane waves from free space.Abstract:
A volumetric negative-refractive-index transmission-line (NRI-TL) metamaterial is presented. This structure constitutes a natural extension of the planar NRI-TL metamaterials1 and maintains the desired features of broad bandwidth and low transmission loss. Unlike their planar counterparts, the proposed volumetric NRI-TL metamaterials can effectively couple incident plane waves from free space. The proposed topology can be readily made by stacking layers that are individually fabricated using standard multilayer printed-circuit board techniques at microwave frequencies. However, the creation of the volumetric structure results in the presence of a parasitic parallel-plate mode. This mode can interfere with the desired backward wave mode of the metamaterial, causing a stop band to appear. To facilitate the rapid analysis of this new design, a multiconductor transmission line model was developed. Through the use of this model and full-wave simulations, it will be demonstrated that this unwanted parallel-plat...read more
Citations
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Journal ArticleDOI
Polarization Control Using Tensor Huygens Surfaces
TL;DR: In this article, a tensor Huygens surface is introduced to control the polarization of the electromagnetic field, which is a crucial aspect of many communication and imaging systems. But it is not a suitable surface for large-scale applications.
Journal ArticleDOI
Free-Space Imaging Beyond the Diffraction Limit Using a Veselago-Pendry Transmission-Line Metamaterial Superlens
TL;DR: In this article, the authors demonstrate free-space imaging with a resolution over three times better than the diffraction limit at microwave frequencies using a Veselago-Pendry metamaterial superlens based on the negative-refractive-index transmission line (NRI-TL) approach, which affords precise control over its properties and is also less susceptible to losses than other approaches.
Journal ArticleDOI
EM transmission-line metamaterials
TL;DR: In this paper, a review of the fundamentals of metamaterials with emphasis on negative-refractive-index ones, which are synthesized using loaded transmission lines, is presented.
Journal ArticleDOI
Enhanced Periodic Structure Analysis Based on a Multiconductor Transmission Line Model and Application to Metamaterials
TL;DR: In this paper, a multimodal representation of the periodic structure unit cell, such as required for periodically loaded MTLs and periodically loaded waveguides with higher order evanescent mode interaction between cells, is presented.
Journal ArticleDOI
Free-Space Imaging Beyond the Diffraction Limit Using a Veselago-Pendry Transmission-Line Superlens
TL;DR: In this paper, the authors demonstrate free-space imaging with a resolution over three times better than the diffraction limit at microwave frequencies using a Veselago-Pendry metamaterial superlens based on the negative-refractive-index transmission line (NRI-TL) approach, which affords precise control over its electromagnetic properties and is also less susceptible to losses than other approaches.
References
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Journal ArticleDOI
Experimental Verification of a Negative Index of Refraction
TL;DR: These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root ofɛ·μ for the frequencies where both the permittivity and the permeability are negative.
Journal ArticleDOI
Planar negative refractive index media using periodically L-C loaded transmission lines
TL;DR: In this article, the authors proposed an alternate perspective on the design and function of such materials that exploits the well-known L-C distributed network representation of homogeneous dielectrics.
Journal ArticleDOI
Periodic analysis of a 2-D negative refractive index transmission line structure
TL;DR: In this article, the propagation characteristics of a two-dimensional (2D) negative refractive index (NRI) transmission line (TL) structure are explained using Bloch theory.
Journal ArticleDOI
Optical nanotransmission lines: synthesis of planar left-handed metamaterials in the infrared and visible regimes
Andrea Alù,Nader Engheta +1 more
TL;DR: In this article, the problem of optical nanotransmission lines (NTLs) that can be envisioned by properly joining together arrays of these basic nanoscale circuit elements was investigated.
Book
Multiconductor transmission-line structures : modal analysis techniques
TL;DR: A Perturbation Approach to Modal Analysis Resonance Effects Due to Multiconductor Line Discontinuities Generalized Modal Theory Bibliography List of Symbols Index as discussed by the authors.