Incident Angle Insensitive Eye Shaped Metamaterial Absorber For Multiband Applications

Abstract

In the microwave frequency domain, I introduce a simple design aimed at designing a multi-band polarization-insensitive MA. Polarization-insensitive MA are currently highly appealing owing to their distinctive absorption characteristics across various polarization angles. This design involves imprinting a specific structure onto a metal-backed dielectric substrate Fr-4, which comprises an eye-shaped labyrinth structure. Upon conducting a series of diverse analyses at an angle of incidence perpendicular to the surface, it has been determined that the proposed arrangement exhibits significant levels of absorption, reaching 94.93% at frequencies of 5.76 GHz, 97.73% at frequencies of 7.432 GHz, 95.89% at frequencies of 10.644 GHz, 98.28% at frequencies of 13.813 GHz, 93.18% at frequencies of 19.048 GHz, 98.72% at frequencies of 21.006 GHz, 99.9% at frequencies of 22.856 GHz, 91.85% at frequencies of 23.756 GHz, and 99.15% at frequencies of 24.746 GHz. To gain deeper insights into the absorption mechanism intrinsic to this design, provide visualizations of surface current distributions.