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What is SAR? - continued
•
Most SAR measurements are performed using calibrated E-field probes
in conjunction with a Robotic arm (positional accuracy) and Data
Acquisition Electronics (signal processing and detection)
•
SAR is expressed as a figure in W/kg Volume Averaged over 1g or 10g
of body tissue.
•
The main formula for a spot SAR for E-field probes is:-
E
SAR 

2
σ = Conductivity of the tissue (S/m)
ρ = Mass density of the tissue (kg/m3)
|E| = rms electric field strength (V/m)
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