Effects of hand on EM absorption of internal handset antenna

An analysis of hand impact on internal handset antenna electromagnetic (EM) absorption is presented in this paper. A planar inverted-F antenna (PIFA) is designed for internal handset antenna. The handset is placed in talk mode in the closed vicinity of human head and hand phantom. The specific absorption rate (SAR) in the human head and total absorbed power by the user are utilized to evaluate EM absorption. The analysis was performed in both cheek and tilt positions of talk mode. The main part of the investigation is based on the finite-difference time-domain (FDTD) method of CST microwave studio. The results indicate that the SAR values are decreased and total absorbed power by user increased significantly due to the inclusion of the user´s hand.