Design and analysis of a compact ultrathin penta-band metamaterial absorber

This study proposes a novel penta-band metamaterial absorber (PMA) that consists of an asymmetric dual split square metal resonator (DSSR), a dielectric substrate, and a copper metal-based ground plane. The design of the PMA unit cell is relatively compact and ultrathin for various penta-band applications. This work asserts a unit cell of 5×5 mm2 area and 1 mm thick substrate. The EM properties of the proposed metamaterial absorber were simulated in ANSYS HFSS software and compared with the experimental results obtained from Vector Network Analyzer post-fabrication of unit cell PMA. The relative error attained between simulated and experimental findings was less than 2%. The pentamerous absorption peaks of nearly perfect absorption were found specifically at 10.40, 12.80, 21.05, 24.29, and 30.41 GHz frequencies with the absorptivity ratios of almost 99.99%, 98.44%, 86.78%, 92.74%, and 93.65%, respectively.