Interaction Between Human Body and RF-Dosimeter: Impact on the Downlink E-field Assessment

The personal radiofrequency dosimeters are increasingly used for the workers exposure estimation to the electromagnetic radiations in terms of reference level of the fields. The presence of the human body at the vicinity of dosimeter compromises its measurement accuracy. In this paper, the study of interaction between personal radiofrequency dosimeter and human body is presented. First, we deal with the error introduced by the presence of the body and an approach to reduce this impact by adding elements in the dosimeter structure. Indeed, by introducing a metal ground plane and optimizing the height of antenna-ground plane, we can estimate at 10 % close the level of incidental field, that is to say a considerable reduction impact of the body on the dosimeter. We also study the stability of the intrinsic characteristics of the dosimeter (isotropy and front to back ratio). Different simulations were performed in the GSM 900 band with the finite integration technique. In the context of the design of worn-body radiofrequency dosimeters it’s very useful to master these interaction results.