Design of Ultra-thin and Polarization-Insensitive perfect metamaterial absorber based on four opening of disc

Abstract

In this paper, a new ultra-thin and polarization-independent perfect Metamaterial Absorber (MA) using a simple sandwich structure is proposed. Numerical simulation is carried out using CST 2015 Microwave Studio software by optimizing the geometrical structure. The numerical simulation results show that the MA achieves perfect absorption at the frequency of 7.625GHz and 15.375GHz, and its absorption is 99.1% and 99.8%, respectively. The numerical simulation results also show that the MA has an ultra-thin thickness of 0.4mm and the MA has the characteristics of polarization insensitivity.