Angularly stable frequency selective surface miniaturized with unit cell

Abstract

Recently, many approaches have been proposed to obtain FSS unit cell dimensions much smaller than a wavelength. In this project, a new type of frequency selective surface (FSS) with miniaturized resonator element is proposed. The FSS structure is shown to have a FSS unit cell dimension that is miniaturized to 0.067 x 0.067 λ. Miniaturization of the FSS unit cell is achieved by coupling two meandered wire resonators separated by single thin substrate layer. The capacitance due to the small separation between the meandered wire elements results in a lowering of the resonant frequency. The FSS produces a stable angular response up to 80 degrees for TE and TM incident angles.