SAR evaluation by modal decomposition using induced near-field of equivalent current sources

Modal expansion of the electric field induced on a head model by a cellular phone is proposed. This technique used equivalent currents on a surface according to Huygens principle. Using Singular Value Decomposition technique, we are able to determine the modes excited by these equivalent sources in a lossy media and to expand the E-field in terms of local modes in the media. Finally, the specific absorption rate (SAR) is directly evaluated.