Calculation of Antenna Radiation Center Using Angular Momentum

Calculation of Antenna Radiation Center Using Angular Momentum

An algorithm to compute the radiation center of an antenna, using the Spherical wave expansion (SWE) of the far field or the far field directly, is introduced. The method is based on the angular momentum that is uniquely defined for any antenna far field pattern. The radiation center is defined as t...

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Veröffentlicht in:IEEE transactions on antennas and propagation 2013-12, Vol.61 (12), p.5923-5930
Hauptverfasser: Friden, Jonas, Kristensson, Gerhard
Format: Artikel
Sprache:eng
Schlagworte:
Angular momentum
Antenna arrays
Antenna measurements
Antenna radiation patterns
Current distribution
far field
phase center
Portable computers
spherical wave expansion (SWE)
Vectors
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Beschreibung
Zusammenfassung:An algorithm to compute the radiation center of an antenna, using the Spherical wave expansion (SWE) of the far field or the far field directly, is introduced. The method is based on the angular momentum that is uniquely defined for any antenna far field pattern. The radiation center is defined as the phase reference point where the angular momentum is minimized and corresponds to minimizing the phase variations in the antenna far field pattern. In addition, this approach also allows for determination of the current distribution axis.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2013.2283033