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Pub. No.:    WO/2005/013663    International Application No.:    PCT/GB2004/003145
Publication Date: 10.02.2005 International Filing Date: 19.07.2004
H01Q 17/00 (2006.01), H05K 9/00 (2006.01)
Applicants: QINETIQ LIMITED [GB/GB]; Registered Office, 85 Buckingham Gate, London SW1E 6PD (GB) (For All Designated States Except US).
TREEN, Andrew, Shaun [GB/GB]; (GB) (For US Only).
LAWRENCE, Christopher, Robert [GB/GB]; (GB) (For US Only).
SAMBLES, John, Roy [GB/GB]; (GB) (For US Only).
HIBBINS, Alistair, Paul [GB/GB]; (GB) (For US Only)
Inventors: TREEN, Andrew, Shaun; (GB).
LAWRENCE, Christopher, Robert; (GB).
SAMBLES, John, Roy; (GB).
HIBBINS, Alistair, Paul; (GB)
Agent: TOCHER, A., J.; QinetiQ Ltd, IP Formalities, Cody Technology Park, A4 Building, Room G016, Ively Road, Farnborough, Hampshire GU14 0LX (GB)
Priority Data:
0316877.0 18.07.2003 GB
Abstract: front page image
(EN)An electromagnetic radiation absorberfor absorbing radiation in the wavelength range &lgr;min to &lgr;max The absorber has a conductor layer in contact with a dielectric layer. The conductor layer carries a plurality of apertures of sub-wavelength dimension and the thickness of the absorber is less than &lgr;min/4n, where n is the refractive index of the dielectric. The dielectric layer may be sandwiched between two conductor layers, one of which has the structure described above. The invention is also directed to various articles comprising such an absorber.
(FR)L'invention concerne un dispositif d'absorption de rayonnement électromagnétique permettant d'absorber un rayonnement compris dans la gamme de longueurs d'onde allant de ?min à ?max. Ce dispositif d'absorption possède une couche conductrice qui se trouve en contact avec une couche diélectrique. La couche conductrice comporte une pluralité d'ouvertures de la dimension de sous-longueurs d'onde et l'épaisseur du dispositif d'absorption est inférieure à ?min/4n, n représentant indice de réfraction de la couche diélectrique. La couche diélectrique peut être prise en sandwich entre deux couches conductrices, dont l'une présente la structure décrite ci-dessus. L'invention concerne également divers articles qui comprennent ledit dispositif d'absorption.
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RU, SC, SD, SE, SG, SK, SL, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, ZM, ZW.
African Regional Intellectual Property Organization (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG).
Publication Language: English (EN)
Filing Language: English (EN)