Generalized-material-independent PML absorbers used for the FDTD simulation of electromagnetic waves in 3-D arbitrary anisotropic dielectric and magnetic media

1998 ◽  
Vol 46 (10) ◽  
pp. 1511-1513 ◽  
Author(s):  
An Ping Zhao
Keyword(s):  
Electromagnetic Waves ◽  
Fdtd Simulation ◽  
Magnetic Media ◽  
Anisotropic Dielectric

scholarly journals FDTD simulation of electromagnetic wave propagation in magnetic randomly inhomogeneous media

2021 ◽  
Author(s):  
Pavel Makarov ◽  
Vladimir Ustyugov ◽  
Leonid Kotov ◽  
Sergey V. Nekipelov ◽  
Viktor Sivkov
Keyword(s):  
Electromagnetic Waves ◽  
Phase Contrast ◽  
Electromagnetic Wave Propagation ◽  
Fdtd Method ◽  
Inhomogeneous Media ◽  
Close Packing ◽  
Fdtd Simulation ◽  
Magnetic Media ◽  
Sine Signal ◽  
Diffuse Distribution

An algorithm for the numerical simulation of the propagation of electromagnetic waves in randomly inhomogeneous magnetic media by the FDTD method has been developed. The formulated algorithm is suitable for analyzing the main timing characteristics, as well as identifying the features of the propagation of various types of signals in both time-independent and time-dependent layered randomly inhomogeneous media. The simulation of the propagation of the sine pulse, sine signal and square wave in time-independent magnetic randomly inhomogeneous media with a various levels of phase contrast of two types - with a “diffuse” distribution of inhomogeneities and their “close packing” is carried out. The influence of the concentration of magnetic granules and the type of their distribution on the characteristics of the transmitted and reflected signals is revealed.

scholarly journals FDTD simulation of electromagnetic wave propagation in magnetic randomly inhomogeneous media

2021 ◽  
Author(s):  
Pavel Makarov ◽  
Vladimir Ustyugov ◽  
Leonid Kotov ◽  
Sergey V. Nekipelov ◽  
Viktor Sivkov
Keyword(s):  
Electromagnetic Waves ◽  
Phase Contrast ◽  
Electromagnetic Wave Propagation ◽  
Fdtd Method ◽  
Inhomogeneous Media ◽  
Close Packing ◽  
Fdtd Simulation ◽  
Magnetic Media ◽  
Sine Signal ◽  
Diffuse Distribution

An algorithm for the numerical simulation of the propagation of electromagnetic waves in randomly inhomogeneous magnetic media by the FDTD method has been developed. The formulated algorithm is suitable for analyzing the main timing characteristics, as well as identifying the features of the propagation of various types of signals in both time-independent and time-dependent layered randomly inhomogeneous media. The simulation of the propagation of the sine pulse, sine signal and square wave in time-independent magnetic randomly inhomogeneous media with a various levels of phase contrast of two types - with a “diffuse” distribution of inhomogeneities and their “close packing” is carried out. The influence of the concentration of magnetic granules and the type of their distribution on the characteristics of the transmitted and reflected signals is revealed.

scholarly journals FDTD simulation of electromagnetic wave propagation in magnetic randomly inhomogeneous media

2021 ◽  
Author(s):  
Pavel Makarov ◽  
Vladimir Ustyugov ◽  
Leonid Kotov ◽  
Sergey V. Nekipelov ◽  
Viktor Sivkov
Keyword(s):  
Electromagnetic Waves ◽  
Phase Contrast ◽  
Electromagnetic Wave Propagation ◽  
Fdtd Method ◽  
Inhomogeneous Media ◽  
Close Packing ◽  
Fdtd Simulation ◽  
Magnetic Media ◽  
Sine Signal ◽  
Diffuse Distribution

An algorithm for the numerical simulation of the propagation of electromagnetic waves in randomly inhomogeneous magnetic media by the FDTD method has been developed. The formulated algorithm is suitable for analyzing the main timing characteristics, as well as identifying the features of the propagation of various types of signals in both time-independent and time-dependent layered randomly inhomogeneous media. The simulation of the propagation of the sine pulse, sine signal and square wave in time-independent magnetic randomly inhomogeneous media with a various levels of phase contrast of two types - with a “diffuse” distribution of inhomogeneities and their “close packing” is carried out. The influence of the concentration of magnetic granules and the type of their distribution on the characteristics of the transmitted and reflected signals is revealed.

scholarly journals Study Effect of Objects Orientation in the Mediums On GPR Signal Reflections Using FDTD Simulation

2018 ◽  
Vol 3 (11) ◽  
pp. 73-77
Author(s):  
Aye Mint Mohamed Mostapha ◽  
Gamil Alsharahi ◽  
Abdellah Driouach
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Ground Penetrating Radar ◽  
High Frequency ◽  
Electromagnetic Waves ◽  
Ground Surface ◽  
Propagation Path ◽  
Fdtd Simulation ◽  
Ground Penetrating ◽  
Dielectric Objects

Ground penetrating radar (GPR) is a very effective tool for detecting and identifying objects below the ground surface.  based on  the propagation and reflection of high-frequency electromagnetic waves. The GPR reflection can be affected by many things like the type of objects orientation, their shapes ..ect. The purpose of this paper is to  study by simulation the effect of objects orientation in two different mediums (dry and wet sand) on the GPR signal reflection using Reflexw software which is based on a numerical method known as finite difference in time domain (FDTD).  The simulations that have been realized included a conductor  and dielectric objects. The results obtained have led us to find that the propagation path, the reflection strength and the signal form change with the change of object orientation and nature. To confirm the validity of the results, we compared them with experimental results previously published by researchers under the same conditions.

FDTD Simulation of Light Propagation Inside a-Si:H Structures

2010 ◽  
Vol 1245 ◽  
Author(s):  
Alessandro Fantoni ◽  
Pedro Pinho
Keyword(s):  
Light Absorption ◽  
Electromagnetic Waves ◽  
Light Propagation ◽  
Light Transmission ◽  
Visible Spectrum ◽  
Propagation Model ◽  
Interface Roughness ◽  
Fdtd Simulation ◽  
Doping Density ◽  
Surface And Interface

AbstractWe have developed a computer program based on the Finite Difference Time Domain (FDTD) algorithm able to simulate the propagation of electromagnetic waves with wavelengths in the range of the visible spectrum within a-Si:H p-i-n structures. Understanding of light transmission, reflection and propagation inside semiconductor structures is crucial for development of photovoltaic devices. Permitting 1D analysis of light propagation over time evolution, our software produces results in well agreement with experimental values of the absorption coefficient. It shows the light absorption process together with light reflection effects at the incident surface as well as at the semiconductor interfaces. While the effects of surface reflections are easily taken into account by the algorithm, light absorption represents a more critical point, because of its non-linear dependence from conductivity. Doping density, density of states and photoconductivity calculation are therefore crucial parameters for a correct description of the light absorption-transmission phenomena through a light propagation model.The results presented in this paper demonstrate that is possible to describe the effect of the light-semiconductor interaction through the application of the FDTD model to a a-Si:H solar cell. A more general application of the model to 2D geometries will permit the analysis of the influence of surface and interface roughness on the device photovoltaic efficiency.

Sign in / Sign up

Export Citation Format

Share Document