Method and device for specific absorption rate measurement of an electric field

A device for calculating the Specific Absorption Rate (SAR) caused in a body by the electric field emitted by a wireless communications transmitter, the device comprising:

• a model of the body in which the SAR value is to be calculated;
• means for holding the device in question in proximity to said model;
• means for measuring the electric field components at specific points in said model;
• means for carrying out said measurements of the electric field at points of a first and a second surface in said model;
• means for letting said measurements comprise measuring a magnitude of the electric field components at said points;
• means for using the measured magnitudes in order to determine a phase of the electric field components at said points, such that a complex electric field at said points is determined;
• means for using the complex electric field in said points in order to determine the complex electric field over an entire volume of interest in said model;
• and,
• means for using the complex electric field over said entire volume in order to calculate the SAR value caused by said device over said volume, wherein in such device the complex electric field in a first of said surfaces is determined by means of the measured field magnitude in the first surface, and an assumed phase value for the first surface, so that a complex field in the first surface is assumed, and the assumed complex field in the first surface is used in order to calculate a complex field for the second surface.