Modelling of radiation patterns using scalar spherical harmonics with vector coefficients
Konferenz: EuCAP 2009 - 3rd European Conference on Antennas and Propagation
23.03.2009 - 27.03.2009 in Berlin, Germany
Tagungsband: EuCAP 2009
Seiten: 5Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
Rahola, Jussi (Nokia Devices R&D, P.O. Box 407, 00045 NOKIA GROUP, Finland)
Belloni, Fabio; Richter, Andreas (Nokia Research Center, P.O. Box 407, 00045 NOKIA GROUP, Finland)
Antenna radiation patterns can be compactly represented using an expansion in spherical harmonic functions. In contrast to widely used expansions in vector spherical wave functions, we use an expansion in scalar spherical harmonics with vector coefficients to represent the vector-valued transverse electric far field (including arbitrary polarization state). The vector coefficients can be obtained using numerical integration or by a least-squares solution, the latter being also applicable to measurement data with incomplete angular coverage. Using the spherical harmonic representation, the rotation and interpolation of radiation patterns becomes very straightforward. The representation can also be used in signal processing algorithms.