Selective radiation measurement for safety evaluation on base stations

Abstract

In this paper, general information about unionized radiation, standards and measurement routines for wireless communication systems, electromagnetic fields and antenna structures are given. The safety of mobile phones has been evaluated in terms of specific absorption ratio (SAR). This SAR values have been defined after long discussions by international standard organizations. Electromagnetic compatibility (EMC) measurements were performed with a compact spectrum analyzer device, measures 400MHz - 6GHz bandwidth, and a triaxial antenna. Electromagnetic fields and power flux density values are measured, and compared with ICNIRP standard curve safety values. These measured values are observed and separated for two base stations at the same point. Measured electric field and power density values are plotted with respect to distance from base station tower, and compared with theoretical results. Finally, the safety distance is defined and calculated.