Recent advances in reflectarray antennas

An overview of the recent advances in the analysis, design and demonstration of reflectarray antennas conducted by UPM has been presented. The analysis technique based on local periodicity and SD-MoM has been used to analyse different reflectarray antennas, including single and dual-reflector configurations, and it has been used in the design of reflectarray antennas to fulfil stringent requirements of broad-band, dual-frequency, multiple beams or contoured beams. Several demonstrators for DBS and point-to-multipoint antennas have shown the capabilities of reflectarray antennas. Finally, the potential of reflectarray antennas to scan or reconfigure the beam using liquid crystals is presented.