Abstract
In this paper, a new design method of structural absorbers was proposed by frequency characteristic analysis of reflectivity function. A simplified Jaumann absorber is discussed, by taking derivation of the reflectivity function and monotonicity analyzing, the contribution of design parameters of the absorber to the reflectivity is determined. For a series of reflectivity targets, the value ranges of the thickness and permittivity of dielectric layer, and the square resistance of resistive layer were calculated. Physical samples were prepared for verification, with quartz plates as dielectric layers, and magnetron sputtered Ni–Cr film as resistance layer. Continuous effective bandwidths below −10 dB in 6.2∼18 GHz band and below −15 dB in 8.2∼16 GHz band were obtained respectively, and their frequency characteristics are consistent with the results of mathematical analysis.
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