3D UWB band-pass frequency selective surface

Abstract

In this paper, we propose the design of a new bandpass frequency selective surface (FSS) with tightly coupled elements for ultra-wideband (UWB) applications. The proposed FSS is constituted of two layers, of periodic array of crossed metallic tapered dipoles, separated by a ground plane and connected via twin wire transmission lines. The size of the unit cell is 0.165λ*0.165λ and its thickness is 0.2λ, where λ is the wavelength at the lower frequency of operation. Which make it much smaller than the conventional multi-layer high-order FSSs. Furthermore, it provides flat band-pass response over UWB band, which is proved through numerical simulation.