W-band single-layer broadband reflectarray antenna

In this paper, a W-band single-layer reflectarray antenna is proposed with the advantages of broadband and high aperture efficiency. A novel dual rotation-symmetry windmill element designed in W-band, which consists two layers copper patches printed on Rogers RT5880 substrate. Based analysis metasurface element, square 13.85λ 0 (44.2 mm) diameter at 94 GHz center frequency was designed, fabricated measured. The shows 1-dB gain bandwidth 25.5% (89-113 GHz) W-band. Moreover, measured 31.1 dBi maximum efficiency 53.4%. result that design has prospects wireless communication applications.