Electromagnetic radiation absorber

An electromagnetic radiation absorber for absorbing radiation in the wavelength range lambdamin to lambdamax. 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 l...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TREEN ANDREW SHAUN, HIBBINS ALASTAIR PAUL, LAWRENCE CHRISTOPHER ROBERT, SAMBLES JOHN ROY
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES ANTENNAS, i.e. RADIO AERIALS BASIC ELECTRIC ELEMENTS CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS MEASURING PHYSICS PRINTED CIRCUITS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	An electromagnetic radiation absorber for absorbing radiation in the wavelength range lambdamin to lambdamax. 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 lambdamin/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.