A foldable/deployable 5G switched-beam smart base station antenna has been developed for sub-6GHz (3.3-7.0 GHz) or mm-wave band (24-34GHz). It consists of dual parabolic cylindrical reflectors with multiple resonant feeds. It can cover the whole azimuth plane (360°) with an arbitrary number of beams ranging from 9 to 60 beams and 18 to 120 ports (±45° polarizations). It can have horizontal and vertical sectorization at the same time. The peaks of the upper beams can be adjusted to be above the nulls of the lower beams and vice versa. Hence, every user will always be close to the peak of one of these beams. Furthermore, each beam can be remotely tilted with an arbitrary vertical and horizontal tilt angles. The antenna is gridded (punched), which significantly reduces the wind-load and the weight. The overall weight of each multi-beam unit with the radome is around 2 kg. Thus, the overall weight of the switched-beam smart base station antenna that consists of three/four of these units to cover the whole azimuth (360°) is about 6/8 kg. All that makes this multi-beam antenna advantageous in several applications such as satellites, earth stations and space shuttles.
The developed switched-beam smart base station antenna has a high capacity because of its large number of beams and its wide frequency bandwidth. Hence, the need for the spatial multiplexing MIMO can be significantly reduced. To reduce the need for spatial diversity MIMO, a broadband resonant single port orthogonally polarized feed antenna has been developed. It is equally sensitive to two perpendicular polarizations (±45°). Thus, the two spatially separated ±45° polarization feeds are replaced by an orthogonally polarized feed with a single port. So, the number of ports becomes equal to the number of beams. The +45° and -45° components of the radiation patterns are close to each other, where each of them is about half of the total gain (i.e. -3dB).The single port orthogonally polarized antenna can also be used in IoT terminals and mobile handsets to reduce the need for spatial diversity MIMO.