Abstract: A wide passband frequency selective surface (FSS) is proposed using a five-layer stacked structure. The proposed structure applies four layers of dielectric plates and five layers of metal patches to provide a passband, and exhibits more stable frequency responses and lower insertion loss under wide-angle oblique incidence of wide angles compared with the typical three-layer metal-dielectric structure. According to the simulation results, the proposed FSS can achieve a passband range of 1.7–2.7 GHz with an insertion loss of less than 0.5 dB and a relative bandwidth of 44.1%, and it can preserve stable transmission characteristics with the incident angle ranging from 0° to 45°.

Keywords: Frequency selective surface (FSS); wide bandwidth; low insertion loss