Base Station Antenna Near-field Radiation Pattern Distortion Analysis
Author(s)
A. Sarolic
Abstract
Base station antenna near-field radiation
pattern distortion analysis
A. Sarolic
Faculty of Electrical Engineering and Computing,
University oj'zagreb, Croatia.
Abstract
When estimating the potential radiation hazard of a base station antenna system,
one often relies on the antenna far-field radiation pattern, while the estimation
often refers to the antenna near-field zone. It is widely accepted that this leads to
overestimation of the field amplitudes. Some recent works suggest the use of
modified analytical models to avoid the overestimation problem. However, all of
these references refer only to a single antenna in the free space. This work shows
that potential near-field radiation pattern distortion due to coilductive objects in
the close proximity of the antenna (like in multiple- antenna configuration)
makes many models inapplicable. In that case, in the directions outside the
mainlobe of the antenna, sidelobes are shifted and changed in an unpredictable
manner. The nulls are either shi
Keywords
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