Time harmonic electromagnetic scattering from a bounded obstacle: An existence theorem and a computational method

1999 ◽  
Vol 40 (10) ◽  
pp. 4859-4887 ◽  
Author(s):  
Lorella Fatone ◽  
Cristina Pignotti ◽  
Maria Cristina Recchioni ◽  
Francesco Zirilli
Keyword(s):  
Existence Theorem ◽  
Electromagnetic Scattering ◽  
Computational Method ◽  
Time Harmonic

STRONG AND WEAK FORMS OF THE METHOD OF MOMENTS AND THE COUPLED DIPOLE METHOD FOR SCATTERING OF TIME-HARMONIC ELECTROMAGNETIC FIELDS

1992 ◽  
Vol 03 (03) ◽  
pp. 583-603 ◽  
Author(s):  
AKHLESH LAKHTAKIA
Keyword(s):  
Electromagnetic Fields ◽  
Method Of Moments ◽  
Electromagnetic Scattering ◽  
Final Section ◽  
The Other ◽  
Numerical Techniques ◽  
Scattering Problems ◽  
Time Harmonic

Algorithms based on the method of moments (MOM) and the coupled dipole method (CDM) are commonly used to solve electromagnetic scattering problems. In this paper, the strong and the weak forms of both numerical techniques are derived for bianisotropic scatterers. The two techniques are shown to be fully equivalent to each other, thereby defusing claims of superiority often made for the charms of one technique over the other. In the final section, reductions of the algorithms for isotropic dielectric scatterers are explicitly given.

On the boundary operator in electromagnetic scattering

1986 ◽  
Vol 103 (1-2) ◽  
pp. 91-98 ◽  
Author(s):  
Rainer Kress
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Electromagnetic Scattering ◽  
Maxwell Equations ◽  
Boundary Operator ◽  
Hölder Continuous ◽  
Operator Mapping ◽  
Time Harmonic ◽  
Continuous Surface ◽  
The Magnetic Field

SynopsisFor radiating solutions to the time-harmonic Maxwell equations, it is shown that the boundary operator mapping the tangential components of the electric field into the tangential components of the magnetic field is a bounded bijective operator from the space of Holder continuous tangential fields with Hölder continuous surface divergence onto itself.

scholarly journals A Numerical Method for Analyzing Electromagnetic Scattering Properties of a Moving Conducting Object

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Lei Kuang ◽  
Shouzheng Zhu ◽  
Jianjun Gao ◽  
Zhengqi Zheng ◽  
Danan Dong
Keyword(s):  
Electromagnetic Scattering ◽  
Scattered Field ◽  
Moving Boundary ◽  
Numerical Approach ◽  
Numerical Results ◽  
Conducting Surface ◽  
Time Harmonic ◽  
Object Based ◽  
Improved Technique ◽  
Difference Time

A novel numerical approach is developed to analyze electromagnetic scattering properties of a moving conducting object based on the finite-difference time-domain (FDTD) algorithm. Relativistic boundary conditions are implemented into the FDTD algorithm to calculate the electromagnetic field on the moving boundary. An improved technique is proposed to solve the scattered field in order to improve the computational efficiency and stability of solutions. The time-harmonic scattered field from a one-dimensional moving conducting surface is first simulated by the proposed approach. Numerical results show that the amplitude and frequency of the scattered field suffer a modulation shift. Then the transient scattered field is calculated, and broadband electromagnetic scattering properties of the moving conducting surface are obtained by the fast Fourier transform (FFT). Finally, the scattered field from a two-dimensional moving square cylinder is analyzed. The numerical results demonstrate the Doppler effect of a moving conducting object. The simulated results agree well with analytical results.

scholarly journals Analysis Method for the Heating of the Human Eye Exposed to High Frequency Electromagnetic Fields

2007 ◽  
Vol 3 (1) ◽  
pp. 3 ◽  
Author(s):  
Andrés Peratta ◽  
Dragan Poljak
Keyword(s):  
Electromagnetic Scattering ◽  
High Frequency ◽  
Electromagnetic Waves ◽  
Specific Absorption Rate ◽  
Scattering Problem ◽  
Analysis Method ◽  
Human Eye ◽  
Time Harmonic ◽  
Standard Finite Element Method ◽  
Frequency Radiation

The paper studies the thermal rise in the human eye caused by time harmonic electromagnetic waves. An eye has been illuminated by a high frequency plane wave with powerdensity 5.0 mW/cm2. Such a problem has been considered as an electromagnetic scattering problem since part of EM energy is transmitted to the eye and part of it is reflected. The total electric field inside an eye and related Specific Absorption Rate (SAR) has been calculated in a frequency range from 0.7 to 4.4 GHz via a hybrid BEM/FEM approach. Knowing the SAR distribution inside the eye provides the calculation of related temperature rise in the human eye due to high frequency radiation by solving Bio-Heat Transfer Equation via standard finite element method.

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