Patent ID: 6700525
Filing Date: 2004-03-02
Classification: H01Q,Y10T

Abstract:
A radiation absorber which is placed on the irradiated side of a conductive surface (L) whose surface resistance <0.1 &OHgr;/square, said radiation absorber comprising three layers, which from said conductive surface outwards consist of a first dielectric (B1), a resistive layer (C1) and a second dielectric (B2), characterised in that for the resistive layer the surface resistance is 225 &OHgr;/square Â±25% and the thickness of the layer without a possible carrier <0.2 mm, that for the two dielectric layers the dielectric constant &egr;=2Â±25%, that the thicknesses of the two dielectric layers are of the same order of magnitude and that the total thickness dA of the radiation absorber, with all the layers included, is selected according to the formula dA=1&varepsilon;&CenterDot;Î»4in order to give an absorption peak at a desired wavelength &lgr; expressed in meters.