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|Title||Simulation of Human Head Model Exposed to RF Radiation from Dipole Antenna Using Finite Difference Time Domain Method|
|Title in Arabic||محاكاة رأس الإنسان المعرض للإشعاع الكهرومغناطيسي الناتج عن ثنائي القطبية باستخدام طريقة الفروق المنتهية في مدﯼ الزمن|
The rapid evolution of the wireless communication technology and the widespread use of mobile phone lead to the increase of public concerns of the influence of the electromagnetic (EM) radiation on the human body. Cell phones emit radio frequency energy, a form of non-ionizing electromagnetic radiation, which can be absorbed by tissues closest to the place the phone is held. The amount of radio frequency power that a cell phone user is exposed to depends on technology of the phone, the distance between the phone’s antenna and the user, and the extent and type of use. In the past, the mobile phone had external antenna on the top of the phone which badly affects human head. Nowadays, the internal antenna is used more than the external antenna because the internal antenna has a good relation with Specific Absorption Rate (SAR). This thesis aims to study the effect of radio frequency (RF) radiation emitted from dipole antenna on the human head and to explore the impact of following parameters: first, the distance between human head and the phone at (5cm, 10cm, 15cm, 20cm, 25cm, and 30cm), the effect of frequency at (900MHz, and 1800MHz) on SAR, power density, second, the distribution of electromagnetic fields by a planar multi-layered model to human head; its (Skin, Dura, Cerebrospinal Fluid, Brain, and Cerebellum) by Matlab program, and Finite Difference Time Domain (FDTD) method, third, High Frequency Structural Simulator (HFSS) software for the simulation and design calculations of the dipole antennas. The study found that the electric and magnetic fields attenuate speed because when it hits human head, it penetrates the skin until it reaches zero in the cerebellum layer. It was found that decreasing the distance between mobile phone radiation and the human head makes electromagnetic wave radiations penetrate deeper up to the cerebellum layer, in addition, we note that the power density and SAR have maximum value at the skin and dura layers. Also, Figures show that the effect of frequency 900MHz by mobile phone global system mobile (GSM) is higher than the frequency 1800 MHz on human head.
|Publisher||الجامعة الإسلامية - غزة|
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