Calibration of implantable E-Field Probe for Measuring Radio frequency Energy Absorption in the Human Body

Abstract

Measurements of radiofrequency energy absorption in biological systems are of importance for compliance evaluation of portable radio transmitters as well as for study of biological effects. These measurements are made possible following the development of implantable, miniature electric-field probes with an isotropic response. The probe should be properly calibrated before it can provide reliable and accurate measurements. Keeping uncertainties small is a challenge and is crucial for both compliance evaluation and studies of biological effects. In this paper, we describe a system and procedures which have been developed for electric-field probe calibration. The total uncertainty associated with a trial calibration was estimated to be within ±10.3% which is better than the ±25% recommendation specified in Health Canada’s Safety Code 6.