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Composite material with chirped resonant cells

A resonant unit, composite material technology, used in antennas, electrical components, leaky waveguide antennas, etc.

Inactive Publication Date: 2009-11-04
HEWLETT-PACKARD ENTERPRISE DEV LP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, problems arise related to the spectral width of the incident radiation for which negative effective permeability and / or negative effective permittivity are achieved

Method used

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  • Composite material with chirped resonant cells
  • Composite material with chirped resonant cells
  • Composite material with chirped resonant cells

Examples

Experimental program
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Effect test

Embodiment Construction

[0016] figure 1 A composite material 102 is shown according to an embodiment. Composite material 102 includes at least one surface 104 capable of receiving incident electromagnetic radiation. The surface 104 typically includes a dielectric substrate such as silicon, although any of a variety of different dielectric materials may be used. By way of example and not limitation, the incident electromagnetic radiation may originate from figure 1 The positive-Z side of the composite material 102 generally propagates in the negative-Z direction and has a wave normal at any of various angles relative to the z-axis.

[0017] The composite material 102 comprises a plurality of local resonant element groups 106 spatially arranged on said surface 104 . Each group of local resonant elements 106 includes a plurality of electromagnetically reactive or resonant elements 108 relative to the wavelength of the incident electromagnetic radiation for which they are to exhibit a negative effecti...

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Abstract

A composite material (102) comprising a dielectric material and a plurality of non-overlapping local resonant cell groups (106) disposed across the dielectric material is described. Each local resonant cell group (106) comprises a plurality of resonant cells (108) that are small relative to a first wavelength (Lambada c) of electromagnetic radiation that is incident upon the composite material (102). Each local resonant cell group (106) has a spatial extent that is not larger than an order of the first wavelength. For each of the local resonant cell groups, the resonant cells (108) therein are chirped with respect to at least one geometric feature thereof such that a plurality of different subsets of the resonant cells resonate for a respective plurality of wavelengths in a spectral neighborhood (203) of the first wavelength (Lambada c). The composite material (102) exhibits at least one of a negative effective permeability and a negative effective permittivity for each of the plurality of wavelengths in that spectral neighborhood (203).

Description

technical field [0001] This patent specification relates generally to the propagation of electromagnetic radiation, and more particularly to composite materials capable of exhibiting a negative effective permeability and / or a negative effective permittivity for incident electromagnetic radiation. Background technique [0002] Composite materials that can exhibit negative effective permeability and / or negative effective permittivity to incident electromagnetic radiation have received increasing attention in recent years. Such materials (also often referred to interchangeably as man-made materials or metamaterials) generally contain periodic arrays of electromagnetic resonant elements whose dimensions are relatively small (e.g., 20% or less) compared to the wavelength of incident radiation. ). Although the individual response of any particular element to an incident wavefront can be quite complex, the overall response of a resonant element can be described macroscopically as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q15/00H01Q15/08H01Q13/28
CPCH01Q15/08H01Q15/0006H01Q13/28H01Q15/0086
Inventor S·-Y·王A·布拉特科夫斯基
Owner HEWLETT-PACKARD ENTERPRISE DEV LP
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