Computation of Effective Dielectric Constant and Electric Field in the Human Head: A Preliminary Study for Electromagnetic Wave Effect

Every day human body getting exposed to electromagnetic (EM) radiation of various kinds and is becoming a serious health threat. Computation of adverse biological effects due to EM radiation in the multilayer human head model is a very challenging task because in multilayer model it is not easy to define exact width of the layer. Quantitative analysis of adverse biological effect is done by computing electric field (E-field), absorbed power density (APD), and specific absorption rate (SAR) in human head. Effective dielectric constant of multilayer model in a more accurate way is quite demanding because all the power absorption and heating effect depends upon the dielectric constant. Generally, researchers are using multilayer model to compute the E-field, APD, and SAR but it has lot of limitation and may not resemble the human head. Therefore, there is a need to develop such a model which resembles more to the actual human head. In this paper, a model is proposed which is having effective dielectric constant of human head to compute E-field, APD, and SAR. Simulation of equivalent human model and a multilayered sphere (Skin, Fat, Bone, Dura, CSF, and Brain tissue layers) of human head of radii 10.63 cm under a normally incident EM wave has been undertaken. A comparison has been drawn between both the models in terms of E-field, APD, and SAR under the condition of normal incidence EM wave. These results may be useful to know the effect of mobile phone radiation on human head.