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Saint-Jean-de-Losne, France

Berenger J.-P.,Center Danalyse Of Defense
IEEE Transactions on Electromagnetic Compatibility | Year: 2012

The complex frequency-shifted perfectly matched layer (CFS-PML) is optimized for the finite-difference time-domain (FDTD) solution of wave-structure interaction problems. This mainly consists of optimizing the parameter of the stretching coefficient of the PML in function of the frequency content of the problem to be solved. The resulting CFS-PML is only a few FDTD cells in thickness and can be placed 2 cells from the structure of interest. This renders the computational cost of the simulation of free space small in comparison with the overall cost of the FDTD calculation. © 2012 IEEE.

Berenger J.-P.,Center Danalyse Of Defense
Journal of Computational Physics | Year: 2011

The Huygens subgridding (HSG) is a subgridding technique developed for the numerical solution of the Maxwell equations. It relies on the theoretical equivalence of any physical volume with two or more fictitious volumes connected by equivalent currents. The application of this concept to the finite-difference time-domain (FDTD) method has been previously published in the one dimensional and two dimensional cases. In this paper the HSG is extended to the general three dimensional case, the exchange of the electromagnetic energy between the two FDTD grids is investigated theoretically, and some modifications to the HSG algorithm are presented with the objective of simplifying its implementation. © 2011 Elsevier Inc.

Abalenkovs M.,University of Manchester | Costen F.,University of Manchester | Berenger J.-P.,Center Danalyse Of Defense | Himeno R.,RIKEN | And 2 more authors.
IEEE Transactions on Antennas and Propagation | Year: 2012

Subgridding methods are often used to increase the efficiency of the wave propagation simulation with the Finite-Difference Time-Domain method. However, the majority of contemporary subgridding techniques have two important drawbacks: the difficulty in accommodating dispersive media and the inability for physical interfaces to cross the subgridding interface. This paper presents an extension of the frequency-dependent Huygens subgridding method from one dimension to three dimensions. Frequency dependency is implemented via the Auxiliary Differential Equation approach using the one-pole Debye relaxation model. Numerical experiments indicate that subgridding interfaces can be placed in various Debye media as well as across the physical interface. © 2012 IEEE.

Almeer H.,University of Manchester | Costen F.,University of Manchester | Berenger J.-P.,Center Danalyse Of Defense
2013 Loughborough Antennas and Propagation Conference, LAPC 2013 | Year: 2013

The use of GPGPU to accelerate the FDTD method and the Huygens Absorbing Boundary Condition is presented. The performance of two GPGPU implementations of the Huygens Absorbing Boundary Condition on Tesla architecture GPUs is proposed in this paper. © 2013 IEEE.

Costen F.,University of Manchester | Berenger J.-P.,Center Danalyse Of Defense
Annales des Telecommunications/Annals of Telecommunications | Year: 2010

A wide range of wireless system developments require knowledge of the distribution of electromagnetic fields from various sources in humans. As experimental assessment is ethically unacceptable, high-resolution numerical dosimetry is needed. The finite-difference time-domain method is the most appropriate due to its simplicity and versatility. Reduction in demands on computational resources can be achieved using subgridding techniques. This paper rigorously introduces frequency dependency to one of the most promising subgridding techniques, Huygens subgridding. The validity of the Huygens surface in lossy media, as well as on the physical interface, is intensively studied.© Institut TELECOM and Springer-Verlag 2009.

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