Electromagnetic modelling of the 32-m Ghana radio telescope

Date Issued
2017
Author(s)
Venter, Mariet
•
DOI
Abstract
This paper presents the electromagnetic modelling and supporting results of the African VLBI Network (AVN) Ghana radio telescope at the operating frequencies of 5 and 6.7 GHz. Working from limited technical data, we establish suitable geometrical parameters for the unshaped version of the Cassegrain system, including modelling and rotation of the four mirrors within the slanted beam-waveguide (BWG). The geometry implemented in GRASP (General Reflector Antenna Software Package) produces several performance values including the effects of the BWG, struts and mechanical tolerances. It is shown that the theoretical maximum gain and aperture efficiency at 5 GHz are 63.09 dBi and 72.56%, respectively. The corresponding values at 6.7 GHz are 65.80 dBi and 75.42%, respectively.
Coverage
2017 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)
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1
Conferenece
2017 IEEE Radio and Antenna Days of the Indian Ocean (RADIO)
Conferenece place
Cape Town, South Africa
Conferenece date
25-28 September, 2017
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open.access
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