Mobile Handset Radiation Efficiency as a Function of the Antenna Position Relative to the Human Head

Abstract:- The radiation efficiency of a mobile handset as a function of its relative position to the user's head, has been investigated. The study was based on theoretical results taken through electromagnetic modelling using MoM and on experimental results obtained by a measuring procedure using a mock-up handset and a phantom head in an anechoic chamber. The distance between antenna and the head as the handset is moving away from the head in the horizontal direction is found to be the main factor affecting the radiation efficiency in comparison with the movement of the handset vertically or horizontally on the "ear to nose " direction. Key-Words:- radiation efficiency, mobile handset, phantom head, method of moments 1