Effective SSB Beam Radiation Pattern for RF-EMF Maximum Exposure Assessment to 5G Base Stations Using Massive MIMO Antennas

European Conference on Antennas and Propagation, pp. 1–5

Abstract

Current extrapolation procedures for the assessment of theoretical maximum RF-EMF exposure to 5G massive MIMO base stations consider the antenna gain difference between SSB and traffic beams. The procedure strongly relies on the provided antenna patterns obtained under ideal conditions, but being distorted and smoothed in practice. In this paper, we investigate the impact of ground reflections (for different ground materials) as well as the vertical sweeping of the measurement antenna (in order to find the local maximum exposure) on the effective base station antenna pattern. It shows that for base station antenna heights ≥30 m, ground reflection dominates the impact and leads to an increase of null levels in the normalized antenna pattern to around -30 dB in case of concrete ground and furthermore, to a slight increase of side lobe levels. Both ground reflection and vertical antenna sweeping additionally lead to a broadening of the side lobes.

Authors 4

1. Thomas Kopacz Aachen Institute of High Frequency Technology

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute of High Frequency Technology,Aachen,Germany

   Institute of High Frequency Technology, RWTH Aachen University, Aachen, Germany

2. Sascha Schiesl Aachen Institute of High Frequency Technology

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute of High Frequency Technology,Aachen,Germany

   Institute of High Frequency Technology, RWTH Aachen University, Aachen, Germany

3. Anna‐Malin Schiffarth Aachen Institute of High Frequency Technology

   RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute of High Frequency Technology,Aachen,Germany

   Institute of High Frequency Technology, RWTH Aachen University, Aachen, Germany

4. Dirk Heberling Aachen Institute of High Frequency Technology

   Fraunhofer Institute for High Frequency Physics and Radar Techniques · RWTH Aachen University

   Affiliation as printed

   RWTH Aachen University,Institute of High Frequency Technology,Aachen,Germany

   Fraunhofer Institute for High Frequency Physics and Radar Techniques, Wachtberg, Germany

   Institute of High Frequency Technology, RWTH Aachen University, Aachen, Germany