Ultra-thin absorbing metasurface of millimeterwave range

Abstract

Along with conventional dissipative dielectric materials, various 2D periodic structures, known as frequency selective surfaces or metasurfaces, are used today for absorbing electromagnetic waves in microwave and terahertz systems. Usually they are fabricated in the form of thin resistive elements periodically arranged on dielectric substrate. Metasurface absorber with cross shaped conducting elements on ultra-thin silicon dioxide substrate is considered in present study. The influence of geometrical sizes on electrodynamic characteristics of such absorber is analyzed numerically. Metasurface under study demonstrates absorption higher than 90% in wide frequency band and can be successfully used in different millimeter wave range systems.