Abstract
Multiband absorption is the interest of the microwave communities due to several applications in sensing, filtering, and stealth. Usually, the stacking of metal and dielectric multilayered structures form a multiband absorber which makes the device bulky and costly. In this paper, we investigate a multiband absorber based on a single-layered fractal metasurface for the 5G applications. The unit cell of the fractal metasurface is comprised of six ring-shaped symmetric split-ring resonators (SRRs) connected back-to-back with each other. The absorptivity is investigated in the 5G microwave regime (22–36 GHz) for various obliquities at different substrate thicknesses. Simulation results show that the proposed fractal metasurface has several absorption peaks in different 5G bands. Furthermore, measured results agree well with the simulation results. The proposed absorber can play an important role in 5G applications wherein sensing the angle of incidence and polarization of the incoming electromagnetic waves is desired.
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