Characterization of miniaturized E-field probes for SAR measurements

SAR compliance tests of wireless products are performed measuring the electromagnetic energy deposition pattern in human-like shaped fiberglass shells filled with liquid tissue simulants. SAR measurements are performed by means of miniaturized electric field probes calibrated in the liquid. The overall uncertainty of SAR tests is strongly dependent on the isotropic response and the spatial resolution of dosimetric probes. We devised experimental procedures to determine these important quality parameters for miniaturized E-field probes immersed inside human tissue simulants. These procedures have been incorporated by the IEEE SCC-34/SC-2 in the upcoming IEEE recommended practice for assessing SAR compliance of hand-held wireless communication devices.