Performance assessment of bi-scalar beamformers in practical phased array feed systems
Paper i proceeding, 2011

We assess the sensitivity and polarimetric performance of a polarimetric phased array feed (PAF) system in which the two sets of nominally orthogonally polarized elements are beamformed separately. Out simulations of an actual PAF system indicate that such bi-scalar instead of full-polarimetric beamforming results in about 4% sensitivity loss and an XPD of about 45 dB. Our measurements confirm the sensitivity loss, but indicate worse polarimetric performance than the simulations. We indicate how the performance of a PAF system with bi-scalar beamforming can be improved by beamforming of the cross-polarization signals and polarimetric corrections to the beamformer outputs.


S. J. Wijnholds

Netherlands Foundation for Research in Astronomy

W. van Cappellen

Netherlands Foundation for Research in Astronomy

Marianna Ivashina

Chalmers, Rymd- och geovetenskap, Avancerad mottagarutveckling

30th URSI General Assembly and Scientific Symposium, URSIGASS 2011, Istanbul, 13-20 August 2011



Elektroteknik och elektronik