Digitized millimeter-wave beam-forming metal reflectarray antenna

Digitized beam-forming metal reflectarray antennas are designed for millimeter-wave region. The phase control of antennas has been implemented by the reconfiguration of rectangular grooves on a metal plate. The antenna has 1,147 elements arranged in an aluminum metal plate. All depths of metal grooves are elaborately manipulated and digitized for designed phase control of high-gain beam-aimed reflectors. We have demonstrated digitized reconfigurable metal reflectarray to steer re-radiated millimeter-wave field from the reflector in a two dimensional plane. The proposed antennas can be a helpful choice for millimeter-wave applications requiring high-gain beam-forming antennas.