Computational methods for modeling of complex sources

• Markus Johansson ^[1] ; Lovisa E. Nord ^[1] ; Rudolf Kopecky ^[1] ; Andreas Fhager ^[1] ; Mikael Persson ^[1]
  1. [1] Chalmers University of Technology

     Chalmers University of Technology

     Suecia

     
• Localización: Compel: International journal for computation and mathematics in electrical and electronic engineering, ISSN 0332-1649, Vol. 27, Nº 1, 2008, págs. 133-143
• Idioma: inglés
• Enlaces
  • Texto completo
• Resumen

  • Purpose – The purpose of this study is to develop and compare two methods of determining the total field, including phase information, when only field amplitudes have been measured on a set of planes in the near field of a complex electromagnetic source.

    Design/methodology/approach – The first method is a gradient‐based optimization algorithm, based on the adjoint fields. The second method employs an optimization algorithm based on the phase angle gradients of a functional.

    Findings – The first method, the adjoint field method, is functioning well for a 2D test case. The second method, the phase angle gradient method, gives very good results for 3D test cases.

    Research limitations/implications – The next step is to test the methods with results from real measurement data.

    Practical implications – The developed methods are intended for use in dosimetry studies and other applications, where the field distribution from electromagnetic sources are needed.

    Originality/value – The methods extend previously made constant phase approximations. The present methods are useful in situations where the electromagnetic source is hard to model.