FDTD Computation of Prostate Tissue Exposure to Cellular Phones Radiation

he Finite-Difference Time-Domain (FDTD) is the most often used method for evaluating of electromagnetic fields in human tissue. The ever-rising diffusion of cellular phones has brought about an increased concern for the possible consequences of electromagnetic radiation on human health. This paper presents a study of electric ,magnetic fields distribution in human prostate tissue . Concerning numerical modeling, the power absorption and specific absorption rate (SAR) in a prostatearegenerally computedusing FDTD methods in one and two dimension. Results show that mobile radiation penetrate the prostate tissues and attenuate fast to reach zero at the inner of tissue. The absorbent power and SAR show maximum at the interface .he Finite-Difference Time-Domain (FDTD) is the most often used method for evaluating of electromagnetic fields in human tissue. The ever-rising diffusion of cellular phones has brought about an increased concern for the possible consequences of electromagnetic radiation on human health. This paper presents a study of electric ,magnetic fields distribution in human prostate tissue . Concerning numerical modeling, the power absorption and specific absorption rate (SAR) in a prostatearegenerally computedusing FDTD methods in one and two dimension. Results show that mobile radiation penetrate the prostate tissues and attenuate fast to reach zero at the inner of tissue. The absorbent power and SAR show maximum at the interface

Field Profile of Asymmetric Slab Waveguide Structure with LHM Layers

This paper presents asymmetric three-layer slab waveguide structure in which all layers are considered left-handed materials (LHMs) with negative electric permittivity and magnetic permeability. The electric field profile is investigated in details with all parameters of the waveguide structure. Many interesting features are observed such as the existence of the fundamental mode and the transition from the fundamental mode to the first guided mode with increasing the imaginary part of the guiding layer permittivity or permeability. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3598

Guided Modes In A Metal-Clad Waveguide Comprising a Left Handed Material As a Guiding Layer

An investigation of guided modes supported by an asymmetrical three layer metal-clad waveguide structure is presented. A left-handed material (LHM) guiding layer sandwiched between a metal substrate and a dielectric cladding is considered. The dispersion characteristics of TE and TM polarizations are analyzed. The effect of the metal layer and the LHM parameters as well as the mode order on the dispersion characteristics and on the power flow is discussed in details. The results reveal many interesting properties for possible applications in optical waveguide sensing.An investigation of guided modes supported by an asymmetrical three layer metal-clad waveguide structure is presented. A left-handed material (LHM) guiding layer sandwiched between a metal substrate and a dielectric cladding is considered. The dispersion characteristics of TE and TM polarizations are analyzed. The effect of the metal layer and the LHM parameters as well as the mode order on the dispersion characteristics and on the power flow is discussed in details. The results reveal many interesting properties for possible applications in optical waveguide sensing

FDTD Method Simulation with Perfect Matching Layer at GSM Frequency

The finite-difference time-domain (FDTD) method is one of the most widely used computational methods in electromagnetic. This paper study the simulation of wave propagation using one and two Finite Difference Time Domain method has been studied. It being used to study the time evolution behavior of electromagnetic field by solving the Maxwell's equation in time domain using perfect matching layer boundary condition. The basic idea is this that the amount of reflected waves is dictated by the intrinsic impedance of the two medium. The software is developed using Matlab programming language. Numerical examples validate the software. is more general since it includes both the propagating mode regime and the evanescent mode regime. Robert et al studied an adaptive finite element method for the wave scattering with transparent boundary [10]. Also viewpoint allows PMLs to be derived for inhomogeneous media such as waveguides, as well as for other coordinate systems and wave equations [11]. In this work we studied the simulation of global system mobile wave propagation using one and two Finite Difference Time Domain method. It being used to study the time evolution behavior of electromagnetic field by solving the Maxwell's equation in time domain using perfect matching layer boundary condition

Guided Waves in a Left-Handed Material Guiding Film With a Ferrite Cladding

We investigate TE guided modes at microwave frequencies in an asymmetric waveguide structure with a left-handed material guiding layer surrounded by a linear dielectric substrate and a gyromagnetic ferrite cladding. The effect of the gyromagnetic ferrite layer parameters on the dispersion properties of the waveguide structure is investigated in details. It is found that the effective wave index of the structure is negative as if the overall structure is a left-handed material. A considerable effect of the gyromagnetic ferrite layer on the dispersion properties of the structure is observed. The power propagating in each layer is also studied.We investigate TE guided modes at microwave frequencies in an asymmetric waveguide structure with a left-handed material guiding layer surrounded by a linear dielectric substrate and a gyromagnetic ferrite cladding. The effect of the gyromagnetic ferrite layer parameters on the dispersion properties of the waveguide structure is investigated in details. It is found that the effective wave index of the structure is negative as if the overall structure is a left-handed material. A considerable effect of the gyromagnetic ferrite layer on the dispersion properties of the structure is observed. The power propagating in each layer is also studied

Numerical Study The Dielectric Properties And Specific Absorption Rate Of Nerve Human Tissue At Different Frequencies

The study of electromagnetic radiation  effects on human body is a very important subject, due to the possible health effects, these electromagnetic waves  can cause in life tissue. In this paper, the  dielectric properties  and specific absorption rat (SAR) distribution in  nerve  human tissues exposed to electromagnetic radiation with different frequencies is studied . We modeled  nerve  tissue by layered system. Finite difference time domain (FDTD) computations were used to evaluator the electric, magnetic field, and specific absorption rate. Results show the dielectric properties as  conductivity, relative permittivity and penetration depth  of  nerve tissue plotted with different frequencies. A one dimensional FDTD algorithm has been built, some simulations for electromagnetic wave through the nerve  tissue is made. Results show that electromagnetic  fields penetrate the life tissues and attenuate fast to reach zero at large time steps. SAR show maximum at the first boundary of tissue  and becomes less value by using high frequency. Also, the result appear that penetration depth and relative permittivity decreased by increasing frequency

3D-FDTD Head Model Exposure to Electromagnetic Cellular Phones Radiation

According to the increasing of mobile phone radiation exposure. Many research has been evaluated the specific absorption rate which is the power dissipation rate normalized by material density in human life tissue exposure to the radiation. Therefore, in this work, the electric field, magnetic field and specific absorption rate generated inside a three human life tissue of head model are studied. The electromagnetic radiation can be measured in terms of specific absorption rate. The human head exposed to global system for mobile communication frequency bands of 900MHz. The radiation absorption analyzed through simulations by using three dimension finite difference time Domain method and computer software program. The penetration of the fields and power density were computed inside the model of human head. Results show that electromagnetic fields penetrate the life tissues and attenuate fast to reach zero at the brain layer, the peak is smaller than because the electric field strike the bone tissue. The absorbent power and specific absorption rate show maximum at the skin layer. Preliminary results show good agreement with previous published using numerical and software technique. Also the results suggest that three layer human model and simulation can help to understand the specific distribution of mobile phone electromagnetic fields inside the human head.According to the increasing of mobile phone radiation exposure. Many research has been evaluated the specific absorption rate which is the power dissipation rate normalized by material density in human life tissue exposure to the radiation. Therefore, in this work, the electric field, magnetic field and specific absorption rate generated inside a three human life tissue of head model are studied. The electromagnetic radiation can be measured in terms of specific absorption rate. The human head exposed to global system for mobile communication frequency bands of 900MHz. The radiation absorption analyzed through simulations by using three dimension finite difference time Domain method and computer software program. The penetration of the fields and power density were computed inside the model of human head. Results show that electromagnetic fields penetrate the life tissues and attenuate fast to reach zero at the brain layer, the peak is smaller than because the electric field strike the bone tissue. The absorbent power and specific absorption rate show maximum at the skin layer. Preliminary results show good agreement with previous published using numerical and software technique. Also the results suggest that three layer human model and simulation can help to understand the specific distribution of mobile phone electromagnetic fields inside the human head

Numerical Study The Dielectric Properties And Specific Absorption Rate Of Nerve Human Tissue At Different Frequencies

The study of electromagnetic radiation effects on human body is a very important subject, due to the possible health effects, these electromagnetic waves can cause in life tissue. In this paper, the dielectric properties and specific absorption rat (SAR) distribution in nerve human tissues exposed to electromagnetic radiation with different frequencies is studied. We modeled nerve tissue by layered system. Finite difference time domain (FDTD) computations were used to evaluator the electric, magnetic field, and specific absorption rate. Results show the dielectric properties as conductivity, relative permittivity and penetration depth of nerve tissue plotted with different frequencies. A one dimensional FDTD algorithm has been built, some simulations for electromagnetic wave through the nerve tissue is made. Results show that electromagnetic fields penetrate the life tissues and attenuate fast to reach zero at large time steps. SAR show maximum at the first boundary of tissue and becomes less value by using high frequency. Also, the result appear that penetration depth and relative permittivity decreased by increasing frequency

Z Transform and FDTD Method in Unmagnetized Plasma

The Z transform is typically used in digital filtering and signal processing problems. The paper illustrates the use of the Z transform in implementing the FDTD method where it is useful to avoid dealing with convolution integral in the time domain by going immediately to Z domain. This work study the pulse propagation in free space that comes upon a plasma. Plasma is very interesting medium and the results illustrated that at low frequencies, it looks like a metal, and higher frequency, it become transparent just like a dielectric medium

Study the Effect of Electromagnetic Radiation on Fetal Spleen Tissue at 500 MHz Simulating by FDTD

The ever-rising diffusion of electromagnetic radiation has brought about an increased concern on human health. Furthermore, technological devices have become essential components of daily life. However, their deleterious effects on the body, particularly on the human life tissue. Also, these electromagnetic waves can cause in life tissue. In this work electric and magnetic fields through spleen fetal tissue have been investigated. Concerning numerical modeling, the power density and specific absorption rate in a spleen fetal tissue by dielectric property at 500MHz studied. It is generally computed using finite difference time domain methods (FDTD) in one and two dimension. Results show that electromagnetic radiation penetrates the fetal spleen tissues and attenuate fast to reach zero at the inner of tissue. The absorbent power and specific absorption rate (SAR) show maximum at the interface.The ever-rising diffusion of electromagnetic radiation has brought about an increased concern on human health. Furthermore, technological devices have become essential components of daily life. However, their deleterious effects on the body, particularly on the human life tissue. Also, these electromagnetic waves can cause in life tissue. In this work electric and magnetic fields through spleen fetal tissue have been investigated. Concerning numerical modeling, the power density and specific absorption rate in a spleen fetal tissue by dielectric property at 500MHz studied. It is generally computed using finite difference time domain methods (FDTD) in one and two dimension. Results show that electromagnetic radiation penetrates the fetal spleen tissues and attenuate fast to reach zero at the inner of tissue. The absorbent power and specific absorption rate (SAR) show maximum at the interface