Multibeam antennas with polarization and angle diversity

A 10-GHz discrete cylindrical lens array with multiple beams is designed and characterized as a receiving angle-diversity array for wireless communications in a multipath environment. The array also has dual-orthogonal polarization and therefore built-in polarization diversity. The array is designed for wide-angle scanning between -45/spl deg/ and 45/spl deg/ and measured scanning patterns are presented. The polarization isolation between the two channels is about 30 dB at boresite and about 10 dB for a 30/spl deg/ scan angle. The addition of the lens array at the very front end of a link shows significant reduction of multipath fading peak-to-null ratio.