Usage of a surface integral representation to reconstruct equivalent currents - with radome applications
Author
Summary, in English
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, ie the radome, is analyzed. The transformation is
based on a full vector surface integral representation that relates the
equivalent currents to the near-field data.
Measured near-field data originating from a reflector antenna
is then examined. The field irradiates a radome whereupon it is
measured on a cylindrical surface. The quantity of data is large since
the height of the radome corresponds to $29-43unit{wavelengths}$ in
the frequency interval $8.0-12.0unit{GHz}$. 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).
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, ie the radome, is analyzed. The transformation is
based on a full vector surface integral representation that relates the
equivalent currents to the near-field data.
Measured near-field data originating from a reflector antenna
is then examined. The field irradiates a radome whereupon it is
measured on a cylindrical surface. The quantity of data is large since
the height of the radome corresponds to $29-43unit{wavelengths}$ in
the frequency interval $8.0-12.0unit{GHz}$. 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).
Publishing year
2005
Language
English
Publication/Series
Proceedings of Radiovetenskap och kommunikation
Document type
Conference paper
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- near field to equivalent currents transformation
- singular value decomposition
- radome applications
- surface integral equation
- arbitrary geometric structures
Conference name
Nordic Conference on Radio Science and Communications, 2005
Conference date
2005-06-14 - 2005-06-16
Conference place
Linköping, Sweden
Status
Published
Research group
- Electromagnetic theory
ISBN/ISSN/Other
- ISBN: 91-7056-123-0