Experimental Investigation of Frequency-selective Properties of Metal Metasurface Supporting a Trapped Mode Resonance

The paper presents the results of theoretical and experimental studies of the metasurface in the form of a flat two-element two-dimensional periodic metal screen of finite thickness with rectangular holes of various cross sections. A comparative analysis of the experimental and theoretical frequency characteristics of the reflection coefficient of a plane electromagnetic wave from the metasurface under study is carried out. The existence of a resonance of the passage of a plane linearly polarized electromagnetic wave through transcendental rectangular holes in the metasurface is experimentally proved.