Source Modeling Using Phaseless Low-Frequency Near-Field Measurements

Johansson, Markus, Lui, Hoi-Shun, Bolomey, Jean-Charles and Persson, Mikael (2012) Source Modeling Using Phaseless Low-Frequency Near-Field Measurements. Ieee Transactions On Electromagnetic Compatibility, 54 3: 613-624. doi:10.1109/TEMC.2011.2171056


Author Johansson, Markus
Lui, Hoi-Shun
Bolomey, Jean-Charles
Persson, Mikael
Title Source Modeling Using Phaseless Low-Frequency Near-Field Measurements
Journal name Ieee Transactions On Electromagnetic Compatibility   Check publisher's open access policy
ISSN 0018-9375
1558-187X
Publication date 2012-06
Year available 2012
Sub-type Article (original research)
DOI 10.1109/TEMC.2011.2171056
Volume 54
Issue 3
Start page 613
End page 624
Total pages 12
Place of publication Piscataway, NJ., United States
Publisher Institute of Electrical and Electronics Engineers
Collection year 2013
Language eng
Formatted abstract
Field measurements of both amplitude and phase generally are more complicated and require more expensive equipment than amplitude-only measurements. Phase retrieval from measured phaseless field data is, therefore, of interest for source modeling in dosimetry applications, electromagnetic compatibility investigations, near-field to far-field transformations and antenna diagnostics. We here present a phase-retrieval method that uses an optimization algorithm based on the phase angle gradients of a functional. Numerical test cases have shown that the method is working for different initial phase distributions as well as different placements of the source. The method also works well for a test case with measured 50 Hz magnetic flux density from a transformer. The obtained phase angles on a measurement plane in front of the transformer gave calculated field amplitudes on other measurement planes that agree well with measured field. The ratios between the largest amplitude difference and the largest measured amplitude for the three Cartesian magnetic flux density components, for one of the planes, are for example 6.62, 9.51 and 6.40.
Keyword Complex source modeling
Electromagnetic dosimetry
Electromagnetic measurements
Inverse Problems
Optimization methods
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Information Technology and Electrical Engineering Publications
 
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Created: Tue, 19 Feb 2013, 12:51:18 EST by Antony Lui on behalf of School of Information Technol and Elec Engineering