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Correction of Numerical Phase Velocity Errors in Nonuniform FDTD Meshes
01/12/2002

Correction of Numerical Phase Velocity Errors in Nonuniform FDTD Meshes

Andreas Christ, Jürg Fröhlich, and Niels Kuster, IEICE Transactions on Communications, Volume E85-B, Issue 12, pp. 2904–2915, December 2002


This paper proposes a novel method to correct numerical phase velocity errors in FDTD meshes with nonuniform step size. It enables the complete compensation of the phase velocity errors introduced by the mesh grading for one frequency and one arbitrary direction of propagation independently of the mesh grading. This permits the usage of the Total-Field-Scattered-Field formulation in connection with electrically large nonuniform FDTD meshes and allows a general reduction of the grid dispersion errors. The capabilities of the proposed method are demonstrated with the help of two examples: (1) the fields in a dielectric sphere illuminated by a plane wave are calculated and (2) a patch antenna simulation demonstrates that the uncertainty in determining its resonance frequency can be reduced by about 50%.

PUBLICATIONS

01/12/2002

Contact
nk@itis.ethz.ch

 

Towards Danger of Mobile Phones in Planes, Trains, Cars and Elevators

Axel Kramer, Jürg Fröhlich and Niels Kuster, Journal of the Physical Society of Japan, Volume 71, Issue 12, page 3100, December 2002

 

 
PUBLICATIONS

01/12/2002

Contact
nk@itis.ethz.ch

 

Electromagnetic Fields, Such as Those from Mobile Phones, Alter Regional Cerebral Blood Flow and Sleep and Waking EEG

R. Huber, V. Treyer, A.A. Borbély, J. Schuderer, J.M. Gottselig, H.-P. Landolt, E. Werth, T. Bertholod, N. Kuster, A. Buck, and P. Achermann, Journal of Sleep Research, Volume 11 Issue 4, pp. 289–295, December 2002