Double Layer Fractal FSSs for 5G Band

As the global popularity of fifth-generation (5G) telecommunication systems increases, so does the need for electromagnetic (EM) shielding rises. For such requirements, frequency selective surfaces (FSS) arise as a possible solution. This paper presents a fractal frequency selective surface (FSS) design for sub 6 GHz 5G bands that provide tri-bands on 1.5 GHz, 3.5 GHz, and 5.5 GHz frequencies. The second-order Sierpinski gasket fractal is taken as the unit cell FSS element. The simulated results of the proposed FSSs design are capable of getting wider bandwidths and minimum attenuation at these three-stop band 5G signals for electromagnetic (EM) shielding applications.