Configuration of a MEMS-based Terahertz Reflectarray Using a Genetic Algorithm

In this work, we demonstrate the configuration of a MEMS-based terahertz reflectarray using a genetic algorithm for continuous beam steering with the capability of manipulating the beam pattern. Two different optimization goals are considered: maximizing the directivity and minimizing the sidelobe level. As preliminary results, we show calculated and simulated radiation patterns where the beam is successfully steered to 45° at 0.3 THz without grating lobes. For the first optimization goal, we achieve a directivity of 16.7 dBi at the desired angle, whereas we suppress the sidelobe level from -13.7 dB to -16 dB for the second optimization goal.