New Simulation Model for Power Density of RF Waves and Its Field Verification

Simulation Models for Power Density of Radio Frequency (RF) Waves are used to ascertain compliance to EMF Standards (Electromagnetic Fields). ITU T has specified these under different accessibility criteria which are widely used and have been extended to revised EMF Standards issued in India. Field measurements of power density are carried out in case the models predict values higher than those specified in EMF Standards. The most critical area where compliance needs to be ensured is the near field region of the antenna as beyond which the path loss decay of RF Waves with distance from emitting source is large enough to ensure that Power Density is much below the Standards. Analysis of Field Measurements has been carried out which gives the result that the existing models being used lead to large scale but safe side overestimation of Power Density in this region. It is shown that a new method based on the Free Space Path Loss Model can be effectively used to estimate the Power Density in near field regions for both Macro and Micro Cells.