Patent
Metamaterials for controlling and guiding electromagnetic radiation and applications therefor
TLDR
A linear metamaterial comprises a transmission line, having a linear dimension, and is loaded with capacitors, and shunted with an inductor such that for an electromagnetic wave having a wavelength greater than the linear dimension and traveling along the axis of the transmission line is simultaneously negative as discussed by the authors.Abstract:
A linear metamaterial comprises a transmission line, having a linear dimension, and is loaded with capacitors, and shunted with an inductor such that for an electromagnetic wave, having a wavelength greater than the linear dimension and traveling along the axis of the transmission line, the effective permeability and permittivity of the metamaterial are simultaneously negative. Applications for the metameterial are also disclosed.read more
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Patent
Thermally switched optical filter incorporating a refractive optical structure
Wil Mccarthy,Richard M. Powers +1 more
TL;DR: In this paper, a thermochromic, thermotropic, or thermoreflective filter relies on a mismatch between the index of refraction of a thermotropic material (e.g., a liquid crystal) and a substrate material that includes refractive or diffractive features.
Patent
Photoconductive metamaterials with tunable index of refraction and frequency
TL;DR: In this paper, the authors present materials and structures whose index of refraction can be tuned over a broad range of negative and positive values by applying above band-gap photons to a structure with a strip line element, a split ring resonator element, and a substrate.
Patent
Body-worn phased-array antenna
Geoffrey B. Rhoads,Hugh L. Brunk +1 more
TL;DR: In this article, the authors describe a radio wearable by a human comprising: a phased-array antenna including a plurality of antennae, the array being configured for wearing over or on a human body, the plurality of antennas provided for spatially positioning in multiple different regions over the human body; an RF radio; and a controller configured for determining relative spatial position information for antennae within the phasedarray antenna.
Patent
Photoconductive Metamaterials with Tunable Index of Refraction
TL;DR: In this article, the authors present materials and structures whose index of refraction can be tuned over a broad range of negative and positive values by applying above band-gap photons to a structure with a strip line element, a split ring resonator element, and a substrate.
Patent
Metamaterial structures for light processing and methods of processing light
TL;DR: In this article, a metamaterial structure (100, 700a, 700b, 700c) for light processing includes a light guide and a composite resonant electromagnetic (EM) structure having a resonant frequency.
References
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Patent
High efficiency directional coupler
TL;DR: In this paper, a circuit for processing radio frequency signals can be placed on a substrate where the circuit can be coupled with a directional coupler and at least one ground, and the dielectric layer can include a first region (102) with a first set of substrate properties and a second region (104), with a second set of surface properties.