A novel miniaturized-element frequency selective surface with a second-order bandpass response

Abstract

A novel miniaturized-element frequency selective surface (MEFSS) providing a second-order bandpass response was presented and experimentally verified. The proposed structure consists of sub-wavelength inductive wire grids and a hybrid resonator composing of a two-dimensional periodic arrangement of miniaturized Jerusalem slots etched into a ground plane, which produces a miniaturized unit cell. The full-wave and equivalent circuit model simulations were performed. A prototype of the proposed second-order bandpass FSS was also fabricated and tested using a free-space measurement setup. The measurement results of this device exhibited a stable frequency response with respect to the angles of incidence up to 45°.