Physical Optics and full-wave simulations of transmission of electromagnetic fields through electrically large planar meta-sheets

Abstract

Ultra-thin metamaterials, called meta-surfaces or meta-sheets, open up new opportunities in designing microwave radomes, including an improved transmission over a broader range of antenna scan angles, tailorable and reconfigurable frequency bands, polarization transformations, one-way transmission and switching ability. The smallness of the unit-cells combined with the large electrical size of microwave radomes significantly complicate full-wave numerical simulations as a very fine sampling over an electrically large area is required. Physical Optics can be used to approximately describe transmission through the radome in terms of the homogenized transmission coefficient of the radome wall. This paper presents the results of numerical simulations of electromagnetic transmission through planar meta-sheets (infinite and circularly shaped) obtained by using a full-wave electromagnetic field simulator and a PO-based solution.