Terahertz frequency selective surface for future wireless communication systems

An overview of recent progress in research and development of various design issues as well as the technical advancements experienced by the frequency selective surfaces (FSSs) in terms of the mechanical integrity, choice of the numerical techniques, reflection/transmission bandwidth, angular/polarization stability, complexity and the cost of the fabrication in the millimetre and terahertz (THz) wave regime of the electromagnetic spectrum for future wireless communication system is discussed. In addition to this, the limitations of various computational techniques, which have been used to analyse the electromagnetic problems such as scattering, reflection/transmission and losses of the FSSs in THz regime, have also been discussed. However, the performance of the FSSs has widely been affected by the ohmic losses and various other factors such as surface roughness, dispersion through the conductor and the skin depth in the THz regime of the electromagnetic spectrum and it has also been exploited. Along with the other various applications of FSS structures as the Fabry-Perot resonators and as quasi-optical filters, we have also discussed a novel FSS design of spatial bandpass filter which can be used for THz communication systems.