Reconfigurable patch-slot reflectarray elements using RF MEMS switches: A subreflector wavefront controller

Reconfigurable feature offers electronic control of each element which provides for easier implementation of the whole reflectarray system. Several potential reflectarray element designs were investigated with critical importance given to the consideration of MEMS implementation in the final design. The reflectarray element with variable slot on ground plane and fixed patch on top was selected for final characterization. The concept of reconfigurability was tested for this design, unit cell of this reflectarray was fabricated and tested, and reflection phase measurements were performed. Future work includes implementation of the actual switches models (MEMS) in the simulation, characterization of losses and development of an addressing scheme for the switch control.