Mathematical Modeling of EMF Energy Absorption in Biological Systems

Abstract

3D shapes. For the comparison of these three methods however, the homogeneous head model is used in all cases.In section 3.4, the Specific Absorption Rate (SAR), which is a quantitative measure of the election field energy deposited in the human tissue, is estimated P. Stavroulakis (ed.), Biological Effects of Electromagnetic Fields © Springer-Verlag Berlin Heidelberg 2003 3.2 Mathematical Modeling Using Experimental and Theoretical Methods ... 1243 Mathematical Modeling of EMF Energy Absorption in Biological Systems the wave transmitted into the object attenuates as it travels and transfers energy to the object. The more lossy the object, the more rapidly the wave attenuates. This characteristic is described by skin depth: the depth at which the Eand H-fields have decayed to e-1 (0.368) of their value at the surface of the object. Skin depth is also the depth at which the Poynting vector has decayed to e-2 (0.135) of its value at the surface. At higher frequencies, the skin depth is very small; thus most of the energy from the fields is absorbed near the surface. For example, for biological material at 2450 MHz the skin depth is about 2 cm; at 10 GHz, it is about 0.4 cm.Other models--spheres, cylinders, prolate spheroids, block models (cubical mathematical cells arranged in a shape like a human body)--have been used to represent the human body in calculating and measuring energy absorbed during plane wave irradiation [61], [57]. The internal E-and H-fields are functions of the incident fields, the frequency, the permittivity, and the size and shape of the object. Especially important for non planar objects are the effects of the polarization of the incident fields.

Power and Current Induction in Arteries and Blood within Due to UHF Exposure

“…The EMF effect on the health and environment has enjoyed a considerable interest of scientific research [1][2][3][4][5][6][7][8]. Despite the extensive work on the health and safety levels of RF and MW, the impact on human and animal health environment of such high frequency electromagnetic spectrum is still not adequately addressed by the scientific world.…”

“…The incident frequency, in the MW and mmWave range 100GHz), is considered. The induced current densities are calculated as a Naggar; PSIJ, 22(1): [1][2][3][4][5][6][7][8]2019; Article no.PSIJ.…”