THALES Airborne Systems (TAS) has developed a new reflectarray design that has proven to be a potentially interesting device suited for space applications like Synthetic Aperture Radars and Telemetry subsystems. This document presents this new reflectarray technology (called ERASP). After a short presentation of the technology, we present radiofrequency measurements results of an engineering model. The measurements have been realized in the CNES antenna test facility.