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1. WO2008045536 - COMPOSITE MATERIAL WITH CHIRPED RESONANT CELLS

Publication Number WO/2008/045536
Publication Date 17.04.2008
International Application No. PCT/US2007/021809
International Filing Date 12.10.2007
IPC
H01Q 15/00 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
15Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
H01Q 15/08 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
15Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
02Refracting or diffracting devices, e.g. lens, prism
08formed of solid dielectric material
H01Q 13/28 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
13Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
20Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
28comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements or conductive elements forming artificial dielectric
CPC
H01Q 13/28
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
13Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
20Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave
28comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements or conductive elements forming artificial dielectric
H01Q 15/0086
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
15Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
0006Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
0086said selective devices having materials with a synthesized negative refractive index, e.g. metamaterials or left-handed materials
H01Q 15/08
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
QANTENNAS, i.e. RADIO AERIALS
15Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
02Refracting or diffracting devices, e.g. lens, prism
08formed of solid dielectric material
Applicants
  • HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. [US]/[US] (AllExceptUS)
  • WANG, Shih-Yuan [US]/[US] (UsOnly)
  • BRATKOVSKI, Alexandre [US]/[US] (UsOnly)
Inventors
  • WANG, Shih-Yuan
  • BRATKOVSKI, Alexandre
Agents
  • COLLINS, David, W,
Priority Data
11/580,33812.10.2006US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) COMPOSITE MATERIAL WITH CHIRPED RESONANT CELLS
(FR) MATÉRIAU COMPOSITE À CELLULES RÉSONANTES À ÉTALEMENT DE SPECTRE (CHIRP)
Abstract
(EN)
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 (λc) 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 (λc). 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).
(FR)
La présente invention concerne un matériau composite (102) comprenant un matériau diélectrique et plusieurs groupes de cellules résonantes locales (106) qui ne se chevauchent pas et qui sont placées sur le matériau diélectrique. Chaque groupe de cellules résonantes locales (106) comprend plusieurs cellules résonantes (108) qui sont de petite taille par rapport à une première longueur d'onde (λc) d'un rayonnement électromagnétique incident sur le matériau composite (102). Chaque groupe de cellules résonantes locales (106) présente une étendue spatiale qui n'est pas supérieure à l'ordre de la première longueur d'onde. Pour chacun des groupes de cellules résonantes locales, les cellules résonantes (108) qu'ils contiennent sont soumises à un étalement de spectre par rapport à au moins une caractéristique géométrique de celles-ci, de manière que plusieurs sous-ensembles différents des cellules résonantes entrent en résonance à plusieurs longueurs d'onde dans un voisinage spectral (203) de la première longueur d'onde (λc). Le matériau composite (102) présente au moins une perméabilité effective négative et/ou une permittivité effective négative pour chacune des longueurs d'onde dans ce voisinage spectral (203).
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