Reflectarray antennas are arrays patches printed onto a grounded dielectric slab and illuminated by a primary source. Due to their planar form, reflectarrays are easy to manufacture and to install and they offer a noticeable flexibility of the radiation pattern which can be controlled in both direction and shape by simply adjusting the geometry of the patches printed onto the reflecting surface. In this presentation, reflectarray design principles will be introduced proposing some examples of active and passive reflectarrays.
Shorted Annular Patch Antennas and/or Other Small Antennas For Small Satellite Missions
Small satellites are generally subject to severe physical and economic constrains usually not imposed on large satellites. Even so, many of the performance capabilities demanded for small satellites are the same for large spacecrafts. Antennas are part of this paradox to which I’ll try to give a possible solution during this short lecture presenting the main features of Shorted Annular Patch (SAP) antennas. If compared to conventional microstrip antenna geometries, this class of radiators offers additional radiation pattern flexibility and other interesting electrical and mechanical proprieties. For these reasons, SAPs have been successfully used in several satellite applications such as low multipath GPS-based attitude control and high gain channels. Here in the following is reported the summary of the presentation: