A Wideband Reflectarray Antenna for Satellite Application with Low Cross-Polarization

A double-layer element consisting of a spider-shaped structure on the top layer and pair concave arms with circular ring middle is proposed for wideband reflectarray low cross-polarization characteristics. The unit cell offers linear wider phase range 800∘. Based cell, an offset-fed octagonal aperture comprising 6769 cells constructed at 11.725 GHz. 1 dB 3 gain bandwidths 25.2% 32.3%, respectively, operating frequency 10–13.85 peak 31.2 dBi efficiency 42% achieved. levels are less than co-polarization by 40 over entire band.