Specific absorption radiation measurement of anomalous Bessel-Hankel fields by base stations antennas

摘要

This paper focuses on the identification and calculation of anomalous fields in the vicinity of base stations antennas whose power emission does not surpasses the required ones as dictated by the well-known radiation standards and norms. For this end, the exponential part of the classical potential vector is expanded onto spherical Hankel and Bessel functions by taking advantage of the isotropic field emission of the source. The usage of high harmonics in the calculations is the key point in this work. In order to observe anomalous field, up to 25 harmonics in all electrodynamics relations were added. We restring ourselves to those base stations antennas located on buildings whose height are ranging between 5 and 10 m. In this study is encountered that the proposed formulation yields a negligible deviation from standard values of exposure levels, through the measurement of specific absorption radiation (SAR) thereby discarding possibilities of contamination by radiation around the emission source. The present model yields a difference of 2.5% with respect to previous works, fact which is traduced in SAR values of around 24μWKg-1 for a 2GHz and 1 Vm-1 source, contemplating an error of order of 0.5%.