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Electromagnetic Source Modeling using Phase Retrieval Methods

Markus Johansson (Institutionen för signaler och system, Biomedicinsk elektromagnetik) ; Hoi Shun Lui (Institutionen för signaler och system, Biomedicinsk elektromagnetik) ; Andreas Fhager (Institutionen för signaler och system, Biomedicinsk elektromagnetik) ; Mikael Persson (Institutionen för signaler och system, Biomedicinsk elektromagnetik)
30th URSI General Assembly and Scientific Symposium, URSIGASS 2011, Istanbul, 13-20 August 2011 p. 1-2. (2011)
[Konferensbidrag, refereegranskat]

Modeling of the field distributions from electromagnetic sources is of interest for various applications for example electromagnetic compatibility investigations, near-field to far-field transformations, antenna diagnostics and electromagnetic dosimetry. In order to determine whether exposure safety guidelines, such as the EU directive 2004/40/EC, are complied with, source modeling methods are important. Two methods for determining the total field, including phase information, when only field amplitudes have been measured on a set of planes in front of an electromagnetic source have been developed. The first method, the adjoint field method, is a gradient based optimization algorithm based on the adjoint fields. The second method, the phase angle gradient method, employs an optimization algorithm based on the phase angle gradients of a functional. Promising results have been obtained both for numerical test cases and for measured field.



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Denna post skapades 2011-12-13. Senast ändrad 2013-06-26.
CPL Pubid: 150000

 

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