Printed Graphene Broadband and Flexible Artificial Magnetic Conductor Metasurface Microwave Radar Absorbers

In this paper, a novel printed graphene broadband and flexible artificial magnetic conductor metasurface (AMC) microwave radar absorber is proposed, which is then optimized through genetic algorithm to achieve broader absorption bandwidth. Different from conventional low loss metallic AMC patterns, the printed graphene AMC patterns achieve the desired anti-phase reflection cancellation through different sheet resistances of the printed graphene AMC patterns with exactly the same shape and size. This novel printed graphene AMC-based metasurface absorber can overcome the limitations of conventional metallic AMC-based absorbers and improve the properties of AMC-based absorbers by providing competitive broadband operation bandwidth, impressive wide-angle performance and good mechanical flexibility as well as design flexibility. The optimized printed graphene AMC-based coding metamaterial absorber proposed in this paper can realize more than 90% absorptivity with a broad absorption bandwidth of 12.375 GHz, ranging from 8.45 GHz to 20.825 GH