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

Persson, Kristin LU and Gustafsson, Mats LU (2004) In Technical Report LUTEDX/(TEAT-7125)/1-15/(2004) TEAT-7125.
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, i.e., the radome, is analyzed. The

transformation is based on the 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... (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, i.e., the radome, is analyzed. The

transformation is based on the 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 vast 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, defects on the radome,

not localized in the measured near field, are focused and detectable on the

radome surface. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Book/Report
publication status
published
subject
keywords
arbitrary geometric structures, surface integral equation, singular value decomposition, near field to equivalent currents transformation, radome applications
in
Technical Report LUTEDX/(TEAT-7125)/1-15/(2004)
volume
TEAT-7125
pages
15 pages
publisher
[Publisher information missing]
language
English
LU publication?
yes
id
d1451cbd-f177-4f1e-9937-53d849c23337 (old id 530299)
date added to LUP
2007-09-12 11:35:12
date last changed
2016-08-16 15:24:17
@misc{d1451cbd-f177-4f1e-9937-53d849c23337,
  abstract     = {Knowledge of the current distribution on a radome can be used to improve<br/><br>
radome design, detect manufacturing errors, and to verify numerical simulations.<br/><br>
In this paper, the transformation from near-field data to its equivalent<br/><br>
current distribution on a surface, i.e., the radome, is analyzed. The<br/><br>
transformation is based on the surface integral representation that relates the<br/><br>
equivalent currents to the near-field data. The presence of axial symmetry<br/><br>
enables usage of the fast Fourier transform (FFT) to reduce the computational<br/><br>
complexity. Furthermore, the problem is regularized using the singular<br/><br>
value decomposition (SVD). Both synthetic and measured data are used to<br/><br>
verify the method. The quantity of data is vast since the height of the radome<br/><br>
corresponds to 29 − 43wavelengths in the frequency interval 8.0 − 12.0 GHz.<br/><br>
It is shown that the method gives an accurate description of the field radiated<br/><br>
from an antenna, on a surface enclosing it. Moreover, defects on the radome,<br/><br>
not localized in the measured near field, are focused and detectable on the<br/><br>
radome surface.},
  author       = {Persson, Kristin and Gustafsson, Mats},
  keyword      = {arbitrary geometric structures,surface integral equation,singular value decomposition,near field to equivalent currents transformation,radome applications},
  language     = {eng},
  pages        = {15},
  publisher    = {ARRAY(0xba33658)},
  series       = {Technical Report LUTEDX/(TEAT-7125)/1-15/(2004)},
  title        = {Reconstruction of equivalent currents using a near-field data transformation - with radome applications},
  volume       = {TEAT-7125},
  year         = {2004},
}