Planar, 3D, switchable UWB frequency selective surfaces

Abstract

In this letter, we propose the designs of new frequency selective surfaces (FSS) for ultra-wideband (UWB) applications. The proposed switchable FSS is a 3D band-pass FSS constituted with a periodic array of two layers, of crossed metallic tapered dipoles, separated by a single-layer band-stop FSS and related by twin wire transmission lines. With this configuration, two propagating paths are formed. One path through the transmission lines with a corresponding band-pass response and the second path allows the propagation through the interlayer with an associated band-stop response. By inserting an on/off switch, between the crossed tapered dipoles, a switchable UWB band-pass/stop response can be achieved.