South African SKA demonstrator systems: Evolving RFI mitigation investigations

Author

Reader, H.C. ; van der Merwe, P.S. ; Otto, A.J. ; Wiid, P.G. ; Langat, P.K. ; Andriambeloson, J. ; van der Merwe, C.

Author_Institution

Dept. of Electr. & Electron. Eng., Stellenbosch Univ., Matieland, South Africa

fYear

2011

fDate

13-20 Aug. 2011

Firstpage

1

Lastpage

4

Abstract

The South African SKA demonstrator is founded on the Karoo Array Telescope (KAT). A holistic approach to radio frequency interference (RFI) mitigation has been adopted from the outset. We describe our group´s contribution to this evolving effort. We consider the RFI beginning from the 100 km powerlines, through to the site base equipment and continue right up to the KAT-7 telescopes. A site survey was conducted with systems initially deactivated and then individually switched on to determine signature characteristics. More detailed studies include analysis of telescope pedestal shielding interfaces and cable transfer impedance.

Keywords

antennas; carrier transmission on power lines; electromagnetic shielding; radiofrequency interference; telescopes; KAT-7 telescope; Karoo array telescope; RFI mitigation investigation; South African SKA demonstrator system; cable transfer impedance; power line; radio frequency interference mitigation; signature characteristics; telescope pedestal shielding interface; Antenna measurements; Arrays; Cable shielding; Electromagnetic compatibility; Extraterrestrial measurements; Power cables; Telescopes;

fLanguage

English

Publisher

ieee

Conference_Titel

General Assembly and Scientific Symposium, 2011 XXXth URSI

Conference_Location

Istanbul

Print_ISBN

978-1-4244-5117-3

Type

conf

DOI

10.1109/URSIGASS.2011.6050735

Filename

6050735