Design of a wideband plasmonic metamaterial absorber based on patterned resistive film

This paper presents an ultra-wideband plasmonic metamaterial absorber (MA) based on a patterned transparent resistive film. The absorber adopts a four-layer structure: a transparent compensating layer, a patterned transparent resistive film, a transparent dielectric layer, and a transparent reflective base plate. Simulation results indicate that the absorber achieves over 80% microwave absorption in the frequency ranges of 11.8–22.7 GHz and 23.9–41 GHz, with a working bandwidth of 28 GHz. It also maintains good broadband absorption under oblique electromagnetic wave incidence (at a 45° incidence angle). Experimental results show a good match with the simulations. This work is significant for designing ultra-wideband plasmonic metamaterial absorbers and applying them in electromagnetic shielding.