Genetic algorithm applied to determine the spherical wave expansion from amplitude-only far-field data

Päivi Koivisto, Johan Stén

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A method is presented for solving the spherical wave expansion (SWE) from far‐field amplitude‐only data. The idea is to minimize the least‐squares difference between the amplitude of the measured field and that of a calculated SWE using a combination of a genetic algorithm (GA) and Newton's method. The uniqueness aspects of the problem are addressed. A measured antenna radiation pattern is analyzed with and without phase data and the results are compared.
Original languageEnglish
Pages (from-to)402-406
JournalMicrowave and Optical Technology Letters
Issue number4
Publication statusPublished - 2005
MoE publication typeA1 Journal article-refereed



  • spherical wave expansion
  • SWE
  • amplitude-only measurement
  • genetic algorithm

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