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Sökning: WFRF:(Kylenfall Ulf 1956)

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1.
  • Flygare, Jonas, 1988, et al. (författare)
  • Sensitivity simulation and measurement of the SKA Band 1 wideband feed package on MeerKAT
  • 2019
  • Ingår i: 13th European Conference on Antennas and Propagation, EuCAP 2019. ; EuCAP 2019
  • Konferensbidrag (refereegranskat)abstract
    • Advances in wideband feed technology for radio telescopes enable high sensitivity observations over large bandwidths. The wideband quad-ridge flared horn (QRFH) feed package for Band 1 of the Square Kilometre Array (SKA) was optimized for high sensitivity. The 3:1 feed package covers 350-1050 MHz and is a complete room temperature system with low-noise amplifiers integrated inside the ridges of the horn. The QRFH is dual-linear polarized and designed with spline-defined profiles for the horn and ridge shape. Measured feed s-parameters show input reflection less than -11 dB across the band with good port isolation. In this paper we present the first measured sensitivity levels of the Band 1 feed package, which was tested on the SKA precursor reflector MeerKAT. We also present measured aperture efficiency and intrinsic cross-polarization (IXR). The measured results show good agreement with simulations.
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2.
  • Haas, Rüdiger, 1966, et al. (författare)
  • Status of the Onsala Twin Telescopes – Two Years After the Inauguration
  • 2019
  • Ingår i: Proceedings of the 24th European VLBI Group for Geodesy and Astrometry Working Meeting. - 9788441656345 ; , s. 5-9
  • Konferensbidrag (refereegranskat)abstract
    • We give a brief overview on the status of the Onsala twin telescopes (OTT), two years after their inauguration. The dierent components of the VGOS systems are briefly described, and the development towards routine operations.
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  • Resultat 1-6 av 6

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