Electromagnetic radiation absorber

Details Electromagnetic radiation absorber Electromagnetic radiation absorber

2004-07-19

2008-09-02

Gregory, Bernarr E (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Radio wave absorber

With particular geometric configuration

C342S001000, C219S678000, C219S679000, C219S680000

Reexamination Certificate

active

07420500

ABSTRACT:
An electromagnetic radiation absorber for absorbing radiation in the wavelength range λminto λmax. 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 λmin/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.

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