Scattering from a periodic array of thin planar chiral structures-calculations and measurements

In this paper, as a first approach toward modeling inhomogeneous bianisotropic slabs, the electromagnetic scattering by an infinite regular array of thin planar chiral structures disposed on grounded or ungrounded dielectric slabs is studied. The electromagnetic analysis is based on the Floquet's theorem and the method of moments associated to quadratic wire segments. Experimental results concerning copolarized and cross-polarized reflection coefficients from both grounded and ungrounded finite grids of novel planar chiral particles are reported. Comparisons are made between numerical and experimental results.