Novel Specific Absorption Rate (SAR) Estimation Method Based on 2-D Scanned Electric Fields

This paper presents two methods that accurately estimate the specific absorption rate (SAR) distribution and spatial averaged SAR in a phantom exposed to electromagnetic waves from a wireless device. These methods theoretically estimate the SAR value from a 2D scanned electric field (e-field) by basically applying the equivalence theorem. The validity of the proposed methods is investigated based on calculated and measured results. The estimated spatial averaged SAR over a 1-g or 10-g mass shows a difference of less than a few percent compared to the original SAR value. Furthermore, the proposed methods have the potential to measure the 3D SAR distribution in several tens of seconds or a few minutes when used in combination with a 2D probe array.