Analysis of Specific Absorption Rate in Multilayered Human Head Using Finite Difference Tine Domain Method (original) (raw)
Related papers
2003
In this paper, the simulation of the electric field distribution and Specific Absorption Rate (SAR) of EM energy at 900 MHz in the human head due to the radiation from the mobile handset using FDTD has been presented. The head models used are both homogeneous (layered) and inhomogeneous (actual) ones using various head tissue materials. Computed E-field distribution and SAR in the head have been reported as function of various parameters of interest.The mobile handset has been modeled as a plane wave source/ actual handset.
ITEGAM- Journal of Engineering and Technology for Industrial Applications (ITEGAM-JETIA), 2015
In this work we show how the study of the absorption of electromagnetic energy will be approached in biological tissues of the human head, originating from cell phones in a 900MHz band, and the development of a program to calculate the Specific Absorption Rate (SAR) in the cell phone user's head. The implementation of the Local Non-Orthogonal Finite-Difference Time Domain method is presented (LN-FDTD), and the use of Uniaxial Perfectly-Matched Layer (UPML), comparing the results obtained with the existing results in the literature.
Calculation of Absorbed Electromagnetic Energy in Human Head Radiated by Mobile Phones
It is well known that analytical methods for solving various electromagnetic problems in heterogeneous geometries are unsuitable. Exceptions are the bodies with one or more degrees of symmetries. Numerical methods can be applied for complex and heterogeneous geometries. The advantages of these methods lie in the ability to model the complex shape and anatomy of the body. In this paper the numerical method Finite integration technique – FIT, have been used to compute the induced E and SAR in model of human head exposed to two models of mobile phones.
The development of mobile phone communication infrastructure in the world has promoted which lead public concern over possible health effects exposure to radio frequency electromagnetic energy(RFEME), emanating from mobile phone antenna . The micro-strip patch antenna plays an important role in electromagnetic energy transmitting and receiving phenomena in mobile phone. In every day human are affected by the radiation of electromagnetic field emitted from mobile phone antenna. The effect of the radiation directly calculated so difficult because the complexity of the human body structure .Two major factor are consider among many other factor when considering effect of radiation from antenna, one is the specific absorption rate (SAR) and another is the skin depth (SD) .The specific absorption rate (SAR) and skin depth (SD) are directly calculated more complex. In this paper, we evaluate the numerical analysis of the specific absorption rate (SAR) and skin depth (SD) with respect to the real life application of operating frequency of the mobile phone for GSM communication. To develop the model, MATLAB tool were used and result from the model was analysis and also compare result theoretically with the other researcher.
Effect of high frequency electromagnetic field on human head using multi-layer model
This paper describes the research work done by using the method of moment in investigating the effects of high frequency electromagnetic field (EM) on a homogeneous and inhomogeneous human head at various frequencies. The behavior of the human head under EM radiation is modeled as a homogenous model and a multilayer model in order to assess biological effects on the human head. The specific absorption rate (SAR) in the human head model is calculated, where the SAR is the main parameter used for indicating the effects of EM field.
2011 IEEE International RF & Microwave Conference, 2011
the investigation between electromagnetic waves (conduction current) and human cell as lossless material has received renewed attention recently. This propagation can come from many sources such as cellular phone. The structure of a human cell were studied from many school of thinking such as biochemical in cell, cytoplasm, nucleus and membrane and the understanding obtained have been used as the basis in the developing of mathematical model. The main objective of this project is to analyze the behavior and determine the parameters of the interaction and propagation in a single cell when expose to electromagnetic wave from lossy material to lossless material such as the attenuation coefficient, electric field and skin depth. The Maxwell equations were used as the basis of the modeling in this project with aid of numerical method approaches specifically Finite-Difference Time Domain (FDTD) techniques and applications. To develop the model MATLAB tool and Graphical Users Interface (GUI) were used. Results obtained from the developed model ware verified with known result obtained from others researchers and with experimentally.
Analysis of Materials Effects on Radio Frequency Electromagnetic Fields in Human Head
Progress In Electromagnetics Research, 2012
In this paper, we propose to study the variability of specific absorption rate (SAR) of a human head due to different materials in the vicinity of the handset. We include the effects of the human hand, handset chassis and additional conductive material particularly handring jewelry. A finite-difference time-Domain (FDTD) method was used to analyze different positions of the conductive ring materials within the hand model. Furthermore, the impact of this material on the performance of an antenna was considered in this study. We found that including a hand model leads to a significant reduction in SAR. The hand influences not only SAR distribution but also antenna performance. Moreover, adding conductive materials to the hand results in increases in the local SAR values of the head model. The results suggest that the hand model is important in SAR evaluation and that having an additional conductive material on the hand may vary the amount of electromagnetic (EM) energy absorption depending on the position of the material.
ijens.org
The interaction between electromagnetic waves and human cellvery importance to study. This interaction can come from many sources such as cellular phone. The structure of a human cell was studied from many school of taught such as biochemical in cell, cytoplasm, nucleus and membrane and the understanding obtained was used as the basis in the developing of mathematical model. The main objective of this project is to analyze the behavior and determine the parameters of the interaction in a single cell when expose to electromagnetic wave such as the attenuation coefficient and electric fields of difference frequency. The Maxwell equations were used as the basis of the modeling in this project with aid of numerical method approaches specifically Finite Difference Time Domain (FDTD) techniques. To develop the model MATLAB tool was used. Results obtained from the developed model was verified with known result obtained from others researchers.