Slanted-comb frequency selective surface for use in reducing specular scatter for TM polarization

Abstract

This paper describes the analysis of a slanted-comb frequency selective surface (SC-FSS) suitable for reducing the specular scatter of an incoming wave. The surface is optimized for reducing specular scatter at oblique angles of incidence. Compared to the original comb reflection FSS (CR-FSS), effective reduction in specular scatter is possible despite a large decrease in effective height, ensuring surface installation is as low profile as possible for integration into building materials and infrastructure. Frequency plots show the effect of changing the slant angle between 9 and 18 GHz.

Corrugated comb frequency selective surfaces for control of wireless propagation in buildings

“…Simulation of such surfaces has shown to produce an accurate prediction of previous surfaces, such as those in [12]. Initial simulations of the prototypes proved difficult due to the inaccuracies in expected parameters following the foiling process.…”

“…The prototyping of these surfaces differs from those reported in [9], [12], as they are precisely milled into a foam substrate with a metallic foil layer on top to form the periodic surface, as shown in Fig. 2.…”

“…It was therefore proposed by the authors in [9], [10] that a comb reflection FSS (CR-FSS) surface be installed in corridor applications to decrease any specular propagation, providing an additional barrier for electromagnetic signals of certain frequencies. Further developments on this subject include material saving pin designs [11] and slanted comb FSS (SC-FSS) for increased ease of installation in narrow corridor cavities [12]. Previously, the construction of prototype surfaces has been from metals such as aluminium and brass.…”