High Frequency Analysis of the Influence of YagiUda Antenna on the Human head

The planar Yagi-Uda antennas find their applicability in many devices around us. They produce electric and magnetic field emissions, which can be harmful to humans on long exposure. In this context, in the first part of this paper is analysed, by high frequency numerical modelling, a Yagi-Uda antenna made in planar electromagnetic technology to determine specific field quantities (directivity, S-parameters, electric and magnetic fields), and respectively the antenna parameters. In the second part, the antenna is modelled in the presence of the human head to determine the influence of the human head on the specific quantities of the antenna (directivity, S-parameters), respectively the influence of antenna emissions on the human head (SAR, electric and magnetic fields). The antenna will be implemented in the presence of the human head by positioned the human head in the emission direction of the antenna for the analysis of the influence of the SAR, electric and magnetic fields on it. The results obtained will be compared and reported to the standards and legislation in force on human occupational exposure, to verify that the limits are met.