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
- Software: dynamic and flexible slot/symbol based scheduling, beamforming and beam management, number of spatial streams
- Hardware: No. of physical cores, hardware threads, vCPUs, size of RAM / VRAM;
- Deployment: MACRO <->Pico<-> small cell, disaggregated/Collapsible architecture;
- Services: URLLC, mMTC and EMBB;
- Portability: Multiple HW/SW platforms;
- Manageability- Orchestration and Automation, service acceleration;
- Cloudification – cloud native, containerized, microservices.
- Features such as Massive/MU-MIMO, CoMP, RIC, NW Slicing, etc., should be
Communications in the millimeter-wave region gets more and more attractive due to the availability of higher bandwidths. 3GPP 5G New Radio (NR) allocates channels in the frequency range from 23 to 53 GHz and IEEE 802.11ay between 56 and 75 GHz. Friis’ transmission equation relates the received (Rx) to the transmitted (Tx) power and depends on the Tx and Rx antenna gains and the path loss. The path loss scales as the square of the wavelength, which needs to be compensated at higher frequencies by applying high gain antennas. A common method to increase the antenna gain is to apply antenna arrays consisting of individually controllable radiators. The calibration and defect detection of antenna arrays is an important topic during their fabrication (e.g. mobile backhaul antennas), or conformance testing of user equipment containing millimeter-wave antenna arrays.
This session will introduce a test setup that allows calculating equivalent electric or magnetic currents on an arbitrary Huygens surface. These currents are obtained by applying the fast irregular antenna field transformation algorithm (FIAFTA), which was developed by the Chair of High-Frequency Engineering of the Technical University of Munich, to sets of near-field (NF) data, which were gathered with an