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Reconstruction of equivalent currents using a near-field data transformation - with radome applications

Persson, Kristin LU and Gustafsson, Mats LU (2005) In Progress in Electromagnetics Research-Pier 54. p.179-198
Abstract
Knowledge of the current distribution on a radome can be used to improve radome design, detect manufacturing errors, and to verify numerical simulations. In this paper, the transformation from near-field data to its equivalent current distribution on a surface of arbitrary material, i. e., the radome, is analyzed. The transformation is based on the scalar surface integral representation that relates the equivalent currents to the near-field data. The presence of axial symmetry enables usage of the fast Fourier transform (FFT) to reduce the computational complexity. Furthermore, the problem is regularized using the singular value decomposition ( SVD). Both synthetic and measured data are used to verify the method. The quantity of data is... (More)
Knowledge of the current distribution on a radome can be used to improve radome design, detect manufacturing errors, and to verify numerical simulations. In this paper, the transformation from near-field data to its equivalent current distribution on a surface of arbitrary material, i. e., the radome, is analyzed. The transformation is based on the scalar surface integral representation that relates the equivalent currents to the near-field data. The presence of axial symmetry enables usage of the fast Fourier transform (FFT) to reduce the computational complexity. Furthermore, the problem is regularized using the singular value decomposition ( SVD). Both synthetic and measured data are used to verify the method. The quantity of data is large since the height of the radome corresponds to 29 - 43wavelengths in the frequency interval 8.0 - 12.0 GHz. It is shown that the method gives an accurate description of the field radiated from an antenna, on a surface enclosing it. Moreover, disturbances introduced by copper plates attached to the radome surface, not localized in the measured near. eld, are focused and detectable in the equivalent currents. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
near field to equivalent currents transformation, singular value decomposition, arbitrary geometric structures, surface integral equation, radome applications
in
Progress in Electromagnetics Research-Pier
volume
54
pages
179 - 198
publisher
EMW Publishing
external identifiers
  • wos:000239757400010
  • scopus:33744550937
ISSN
1070-4698
DOI
10.2528/PIER04111602
language
English
LU publication?
yes
id
c0be13e2-3592-4b03-bef6-6a1422a95a3c (old id 395457)
date added to LUP
2007-08-23 17:25:17
date last changed
2017-07-30 03:38:38
@article{c0be13e2-3592-4b03-bef6-6a1422a95a3c,
  abstract     = {Knowledge of the current distribution on a radome can be used to improve radome design, detect manufacturing errors, and to verify numerical simulations. In this paper, the transformation from near-field data to its equivalent current distribution on a surface of arbitrary material, i. e., the radome, is analyzed. The transformation is based on the scalar surface integral representation that relates the equivalent currents to the near-field data. The presence of axial symmetry enables usage of the fast Fourier transform (FFT) to reduce the computational complexity. Furthermore, the problem is regularized using the singular value decomposition ( SVD). Both synthetic and measured data are used to verify the method. The quantity of data is large since the height of the radome corresponds to 29 - 43wavelengths in the frequency interval 8.0 - 12.0 GHz. It is shown that the method gives an accurate description of the field radiated from an antenna, on a surface enclosing it. Moreover, disturbances introduced by copper plates attached to the radome surface, not localized in the measured near. eld, are focused and detectable in the equivalent currents.},
  author       = {Persson, Kristin and Gustafsson, Mats},
  issn         = {1070-4698},
  keyword      = {near field to equivalent currents transformation,singular value decomposition,arbitrary geometric structures,surface integral equation,radome applications},
  language     = {eng},
  pages        = {179--198},
  publisher    = {EMW Publishing},
  series       = {Progress in Electromagnetics Research-Pier},
  title        = {Reconstruction of equivalent currents using a near-field data transformation - with radome applications},
  url          = {http://dx.doi.org/10.2528/PIER04111602},
  volume       = {54},
  year         = {2005},
}