Optically transparent frequency selective surface for ultrawideband applications

Abstract A multilayer ultra‐wideband frequency selective surface (FSS), which filters the frequency range between 3.38 and 4.66 GHz is presented. The proposed structure having a transparent substrate allows the light pass through itself, while it filters the electromagnetic waves at the frequency band of interest; and it has a bandwidth of 1.28 GHz. For the FSS structure, a transparency level of 52.5% obtained with a fractional bandwidth value of 32%. The structure is examined layer by layer; and the proposed FSS structures are evaluated in terms of bandwidth and transparency level.