Millimeter-wave circular polarized beam-steering antenna array for gigabit wireless communications

This paper presents a 2/spl times/2 beam steering antenna with circular polarization at 61 GHz for high speed communications. It demonstrates approximately 14 dBi directivity and twenty degree half power beamwidth. The cross polarization is at least 14 dB. Design method, simulation, manufacture and characterization of the antenna are presented. The proposed small-scale array antenna is suitable for various high speed wireless applications.