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Human exposure to mobile devices is traditionally measured by a system inwhich the human body (or head) is modelled by a phantom and the energy absorbedfrom the device is estimated based on the electric fields measured with asingle probe. Such a system suffers from low efficiency due to repeatedvolumetric scanning within the phantom needed to capture the absorbed energythroughout the volume. To speed up the measurement, fast SAR (specificabsorption rate) measuring systems have been developed. However, discrepanciesof measured results are observed between traditional and fast measuringsystems. In this paper, the discrepancies in terms of post-processingprocedures after the measurement of electric field (or its amplitude) areinvestigated. Here, the concerned fast measuring system estimates SAR based onthe reconstructed field of the region of interest while the amplitude and phaseof electric field are measured on a single plane with a probe array. Thenumerical results presented indicate that the fast SAR measuring system has thepotential to yield more accurate estimations than the traditional system, butno conclusion can be made on which kind of system is superior without knowledgeof the field-reconstruction algorithms and the emitting source.

Discrepancies of measured SAR between traditional and fast measuring systems