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Electromagnetic Field Computing in Layered Media


In many cases the effect of the environment (ground, ocean and atmosphere) can be simply represented by a model consisting of one or more planar dielectric layers. Thus, the methods for modelling electromagnetic scattering and inverse scattering by objects in layered media have wide applications for example in radar remote sensing, land mine detecting, geophysical prospecting, medical imaging and target identification. In addition, the layered medium model is a very widely applied approximation in the analysis of microstrip antennas.

The research group has developed an efficient numerical algorithm for computing multilayered media Green's functions based on classical Hertz potential approach. Traditionally the spatial domain multilayered media Green's functions are presented by slowly converging and oscillating Sommerfeld integrals. Numerical calculation of these integrals is very time consuming and demanding. In order to speed up and make the calculations easier the research group has studied efficient closed form expressions for the multilayered media Green's functions.


Research Topics

  • Multilayered media Green's functions.
  • Calculation of Sommerfeld integrals.
  • Efficient closed form expressions for multilayered media Green's functions.
  • Generalized pencil of function method.
  • An application of method of moments with multilayered media Green's functions.
  • Triangular patch model with RWG basis functions in layered media.

Publications

  • P. Ylä-Oijala, M. Taskinen and J. Sarvas: Multilayered Media Green's Functions for MPIE with General Electric and Magnetic Sources by the Hertz Potential Approach, Progress in Electromagnetic Research, PIER 33, pp. 141-165, 2001.

  • P. Ylä-Oijala and M. Taskinen: Efficient Use of Closed Form Green's Functions for the Electromagnetic Scattering by 3D Buried Objects, Proceedings of 2001 IEEE AP-S Symposium, Vol. 4, pp. 834-837, Boston, USA, 2001.

  • J. Sarvas, P. Ylä-Oijala and M. Taskinen: Multilayered Media Green's Functions, Proceedings of 2001 USNC/URSI National Radio Science Meeting, pp. 137, Boston, USA, 2001.


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