A New Binary Topology Model for EM Surface Unit Cell Design Optimization

An edge-based topology model for EM surface unit cell optimization is presented in this paper. The proposed model provides additional design diversity compared to designs based on the conventional pixellated cells. A fast method for removing metallization and introducing slots is used that provides for an efficient computational implementation. A frequency selective surface (FSS) that separates TE and TM responses has been developed as an example, where a patch-like scatterer is shaped and perforated with slots to demonstrate the usefulness of the proposed topology model.