Metamaterials are artificial materials composed of various inclusion embedded in a host medium, in specific arrangements. These structures are often exploited because their macroscopic characteristics are not just related to the molecular structure but to their geometry. A metasurface (MTS) is a thin metamaterial layer (2D metamaterial). MTSs can be designed to provide engineered boundary conditions for controlling the propagation of surface waves and radiation. Considering this, the use of metasurfaces can be extremely helpful in order to create antennas whose properties can be ”easier” controlled exploiting more degrees of freedom compared to common used materials. This thesis work aims at the creation of a scripting code able to provide the automatic generation of the complete geometry of an MTS antennas structure exploiting commercial software environments (Microwave Studio and Matlab), at the validation of designed antenna models through numerical simulations, and at the antenna optimizations to improve performances for new possible scenarios..