Recent Progress of Incidence Angle-insensitive Broadband Metamaterial Absorbers

Abstract

This paper introduces the recent progress of incidence angle- and polarization-insensitive broadband metamaterial (MM) absorbers. The polarization insensitivity can be easily achieved by a symmetric geometry. In order to achieve incidence angle insensitivity, a unique unit cell must be designed. In this paper, we introduced three angle insensitive unit cells for metamaterial absorber applications. In order to achieve broadband absorption, we introduced two approaches such as multi-resonance and resistive patterns based on the angle- and polarization-insensitive MM absorbers. Therefore, we presented three angle- and polarization-insensitive broadband metamaterial (MM) absorbers.