New challenges for active reflectarrays

Active reflect-arrays have proven to be candidates with strong assets as low cost and high performance phased array antennas. THALES Systemes Aeroportes has been developing for some years a concept based on a wave-guide phase shifting cell and applied for various applications in X band. Recent and future applications necessitate improved performances, hence requiring new developments in technique, technology and simulation models. Some of these new challenges are presented here.