42 citations · 170 across the 16 of their papers we have counts for
5 papers · 2 filters
Numerical Results for the System Noise Temperature of an Aperture Array Tile and Comparison with Measurements
M. V. Ivashina, E. E. M. Woestenburg, L. Bakker +1
The purpose of this report is to document the noise performance of a complex beamforming array antenna system and to characterize the recently developed noise measurement facility…
Element gain drifts as an imaging dynamic range limitation in PAF-based interferometers
O. M. Smirnov, M. V. Ivashina
Interferometry with phased-array feeds (PAFs) presents new calibration challenges in comparison with single-pixel feeds. In particular, temporal instability of the compound beam pa…
Experimental Results of the Sensitivity of a Low Noise Aperture Array Tile for the SKA
E. E. M. Woestenburg, L. Bakker, M. V. Ivashina
Aperture arrays have been studied extensively for application in the next generation of large radio telescopes for astronomy, requiring extremely low noise performance. Prototype a…
An Axi-Symmetric Segmented Composite SKA Dish Design: Performance and Production Analysis
M. V. Ivashina, R. Bakker, J. G. bij de Vaate +4
A concept of an axi-symmetric dish as antenna reflector for the next generation radio telescope - the Square Kilometre Array (SKA) - is presented. The reflector is based on the use…
Performance of Polarimetric Beamformers for Phased Array Radio Telescopes
Marianna V. Ivashina, Stefan J. Wijnholds, Rob Maaskant +1
The results of four recently introduced beamforming schemes for phased array systems are discussed, each of which is capable to provide high sensitivity and accurate polarimetric p…