A Novel Low-Cost Frequency Selective Structure for Millimetre-Wave and Terahertz Applications

A very simple form of frequency selective structure is considered for millimetre-wave and terahertz (THz) applications. It consists of a two-dimensional periodic array of through-holes, which are drilled in a printed circuit board (PCB). Quality factor of this FSS can be easily controlled by the size of holes, and the separation among them. Unlike other reported millimetre-wave/THz FSS designs, the proposed structure does not require a silicon substrate and microfabrication chamber. Instead, it can be fabricated on a commonly available double-sided copper PCB, through a low-cost fabrication method.