Electromagnetic analysis and preliminary commissioning results of the shaped dual-reflector 32-m Ghana radio telescope
Date Issued
2018
Author(s)
Abstract
This paper presents results from the electromagnetic analysis of the African VLBI Network shaped Ghana radio telescope at the operating frequencies of 5 and 6.7 GHz. The geometry implemented in commercial electromagnetic software provides insight into the effects of the slanted beam-waveguide, shaped reflector illumination and mechanical tolerances, which are known to be more stringent compared to a perfect paraboloid. It is shown that the theoretical maximum gain and aperture efficiency at 5 GHz are 63.80 dBi and 85.45%, respectively. The corresponding values at 6.7 GHz are 66.47 dBi and 88.00%, respectively. Comparisons to sidelobe maps produced from astronomical observations are also discussed, showing possible misalignment in the structure when utilised outside its originally intended purpose.
Coverage
IEEE Radio and Antenna Days of the Indian Ocean (IEEE RADIO 2017)
Volume
321
Issue
1
Start page
012003
Conferenece
IEEE Radio and Antenna Days of the Indian Ocean (IEEE RADIO 2017)
Conferenece place
South Africa
Conferenece date
25–28 September, 2017
Issn Identifier
1757-8981
Ads BibCode
2018MS&E..321a2003V
Rights
open.access
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