Xiande Wang

TL;DR: In this paper, a full-wave analysis technique based on the finite element-boundary integral method is developed and used to rigorously treat the scattering from periodically structured metamaterials incorporating anisotropic liquid crystals (LCs) and dispersive materials.

TL;DR: In this article, the effective electromagnetic parameters of a slab of anisotropic metamaterial from reflection and transmission coefficients (or scattering parameters) are retrieved from plane waves incident obliquely on a metammaterial slab at different angles.

TL;DR: In this paper, a hybrid-mode horn antenna with a low-index metamaterial was designed to improve the performance of conventional horn antennas over the entire Ku-band while introducing negligible losses.

Abstract: A novel methodology is presented for the design synthesis of matched impedance thin planar composite magneto-dielectric metasurfaces. The design synthesis involves optimizing thin, metallo-dielectric metasurfaces comprised of a periodic array of electrically small and rotationally symmetric metallic unit cells which are sandwiched between two thin dielectric layers and backed by a perfectly conducting ground plane. Optimization of the structures is carried out with a genetic algorithm (GA) to obtain a design with electromagnetic properties that are equivalent to a desired matched-impedance homogeneous medium of the same thickness. Optimized design results demonstrate the effectiveness of this new technique in synthesizing thin planar composite matched-impedance magneto-dielectric metasurfaces (MIMDM). To validate the approach, full-wave simulations of the actual metamaterial structure were compared with results obtained by employing an equivalent homogeneous effective medium and found to be in excellent agreement. Several designs are optimized with targeted applications such as substrates for miniaturized patch antennas and electromagnetic absorbing materials.

TL;DR: In this article, an efficient technique is developed to fabricate optically thin metallic films with subwavelength patterns and their complements simultaneously, and it is shown that Babinet's principle nearly holds for these structures in the optical domain.