An estimation method for vector probes used in determination SAR of multiple-antenna transmission systems

This paper presents a fast method to estimate Specific Absorption Rate (SAR) of multiple-antenna transmission systems which employ two or more antennas in a communication. SAR values for arbitrary sets of relative phases of the antennas at a measurement point can be estimated from measured E-field with few known relative phases at the same measurement point. Fundamental concepts and analyzes are presented. Several numerical validations with different antenna configurations have been carried to verify the correctness of the estimation method. It has been highlighted that the proposed estimation method is simple yet provide highly accurate estimated SAR values.