Design of a Ultrathin Broadband and Large Incident Angle Metamaterial Absorber

In this paper, a ultrathin broadband and large incident angle metamaterial absorber by introducing a near-field coupling of split-ring resonators and the non-uniform periodic arrangement is proposed, which demonstrates intentional performance in terms of bandwidth and large-angle absorption. The results show that a bandwidth of absorption at 70% from 13 GHz to 34 GHz. Absorber has good stability for TE and TM modes at large incident angles and exhibits more than 80% absorptivity up to 60° incident angles for TM mode. This finding provide a novel technique for broadband device design, which could bring about a wide range of applications in microwave technology.