Analysis and Design of Cavity Antenna Using Metasuperstrate and Slot Feeding Structure

The Fabry-Pérot cavity is established between a single-layer metamaterial-based partially reflective surface (PRS) with appropriate structure for feeding is presented in this paper. The metasuperstrate cosist of ۶x۶ array of the unit cells which is located about half-wavelength at ۱۴ GHz. The feeding antenna is designing by interfacing CST and Matlab that has many advantages; Interfacing CST and Matlab provides implementation of mathematical algorithms and graphical facilities that are not available in the CST, we don’t need to solve complex mathematical equations and we can make simulation time shorter and increased validity of the results. The feeding area is divided to size of λ/۱۰ and conducting or non-conducting property of each cell is defined using binary encoding in genetic algorithm; If a cell is conducting, then the corresponding gene is assigned ۱, and if a cell is non-conducting, it is assigned ۰. Finally, the optimized structure has the best results, including a suitable bandwidth about ۳۹.۷۱% and gain ۸.۳dB.