Polarization independent dual function metasurface using transparent materials

Abstract

A dual function metasurface with transparent materials is investigated. The design has been inspired from both high impedance surface (HIS) and frequency selective surface (FSS) theories. In order to obtain reflective and transmissive functionality for different sides of the suggested surface, two different geometries are designed on each side of a quartz substrate. The front geometry of the unit cell comprises four stripes that contribute to the reflection of TE mode and the rear layer of the unit cell comprises a slotted patch that functions as a polarization filter for the TE mode allowing transmission of TM mode. The design and simulation of the unit cell presented within this document was produced using full wave simulation software (CST Microwave Studio). The single unit cell is simulated with periodic boundary conditions at the operating frequency of 26.5GΗz. Materials such as ITO, quartz and silver have been used for the rear element, the substrate and the ultra-thin stripes respectively, thus we can assume that the structure is at least semi-transparent.