Patent
Gradient index lens for microwave radiation
TLDR
In this paper, a gradient index lens for microwave radiation is proposed, where a plurality of electric field coupled resonators are arranged in a planar array having spaced apart side edges and spaced apart top and bottom edges.Abstract:
A gradient index lens for microwave radiation. The lens includes a plurality of electric field coupled resonators wherein each resonator has a resonant frequency. The resonators are arranged in a planar array having spaced apart side edges and spaced apart top and bottom edges. The resonant frequency of the resonators varies between at least two of the spaced edges of the array in accordance with the desired properties of the lens.read more
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Patent
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David R. Smith,Nathan Kundtz +1 more
TL;DR: In this article, a gradient index lens with no aberrations and related methods for making such lenses are described, which can be a substantially spherically-shaped lens that has at least one side that is flattened such that a locus of focal points resides on a plane.
References
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Journal ArticleDOI
Electric-field-coupled resonators for negative permittivity metamaterials
TL;DR: In this article, a lithographically patterned inductive-capacitive resonator is described that has a strong electric response and can be used to construct metamaterials with desired positive or negative permittivity.
Patent
Phased array metamaterial antenna system
TL;DR: In this article, an efficient, low-loss, low sidelobe, high dynamic range phased-array radar antenna system was proposed that uses metamaterials, which are manmade composite materials having a negative index of refraction, to create a biconcave lens architecture.
Patent
Left handed composite media
TL;DR: In this paper, a composite media of the invention combines media, which are either separately composite or continuous media, having a negative permittivity and a negative permeability over a common frequency band.
Patent
Metamaterials for controlling and guiding electromagnetic radiation and applications therefor
TL;DR: 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.
Patent
Navigation of remote controlled vehicles
TL;DR: In this paper, a vehicle is navigated using a laser tracking system and one or both of: (i) a compass and (ii) wheel encoders, and the navigation system may be used, in one embodiment, to maintain an echelon formation of remote controlled mine detection vehicles.