Absorbing performance of ultrathin wide-band planar metamaterial absorber

Abstract

We propose an ultrathin metamaterial absorber based on Minkowski fractal frequency selective surface and resistive films, which shows a wide-band polarization insensitive and wide-angle strong absorption. This absorber consists of Minkowski fractal loop structure electric resonator, dielectric substrate and backing continuous resistive films. The finite element method was used to simulate and analyze the absorption of the metamaterial absorber. The corresponding high absorption mainly originates from the multiband resonance properties of Minkowski fractal loop structure and Ohmic loss properties of resistive films. The further simulated results indicate that surface resistance of resistive films and dielectric constant can affect the absorbing properties of the metamaterial absorber. This absorber maybe applied in many military fields.