DESIGN AND ANALYSIS OF RING MULTIBAND METAMATERIAL ABSORBER

In this paper a metamaterial absorber (MA) inspired from a split-ring structure has been designed that exhibits three resonant peaks in the C-band and starting of X-band range. Proposed structure for the absorber is a three-layer rectangular split-ring with different absorption peaks at 8.488, 8.02, 7.51 GHz with 99.25%, 95.11%, 93.93% absorptivity respectively. MA is designed on the low-cost FR-4 material with dielectric constant 4.4 and substrate thickness 0.5 mm. Performance of the absorber is evaluated in terms of absorptivity related to three layers, material parameters and normalized impedance.