Frequency selective surfaces as spatial filters: Fundamentals, analysis and applications

In the present scenario, there are prime challenges that need to be addressed in modern wireless communication systems. These challenges consist of implementation of techniques which are meant for increasing the capacity and enhancing the data rate for providing the better quality of service. Frequency Selective Surfaces (FSSs) help to address these challenges by offering spatial filtering techniques in wireless communication systems. In this paper, a detailed survey on the FSSs is presented with a focus on the fundamental principles, geometries, and fabrication techniques employed for manufacturing. An extensive review is presented for understanding the journey from traditional elements utilized for making FSSs structures up to three-dimensional FSS geometries. In addition to the shapes of the FSS structures, the focus has also been on the design and analysis of the geometries for numerous applications. An inherent property of FSSs is their capability to act as spatial filters when substituted in the electromagnetic radiation environment. Also, the spatial filtering mechanism exhibited by the FSSs is reported indicating the differentiation on the basis of applications and frequency ranges on which these surfaces are exposed. (C) 2021 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University.