{"id":4671,"date":"2017-09-08T16:07:50","date_gmt":"2017-09-08T14:07:50","guid":{"rendered":"https:\/\/www.oa-cagliari.inaf.it\/?post_type=seminari&#038;p=4671"},"modified":"2025-09-22T23:42:25","modified_gmt":"2025-09-22T21:42:25","slug":"electromagnetic-analysis-of-and-aperture-efficiency-measurement-techniques-for-the-ghana-radio-telescope","status":"publish","type":"seminari","link":"https:\/\/www.oa-cagliari.inaf.it\/en\/seminars\/electromagnetic-analysis-of-and-aperture-efficiency-measurement-techniques-for-the-ghana-radio-telescope\/","title":{"rendered":"Electromagnetic analysis of and aperture efficiency measurement techniques for the Ghana Radio Telescope"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-1560 size-full\" src=\"https:\/\/www.oa-cagliari.inaf.it\/wp-content\/uploads\/2025\/09\/2017120509341100149.jpg\" alt=\"\" width=\"500\" height=\"375\" srcset=\"https:\/\/www.oa-cagliari.inaf.it\/wp-content\/uploads\/2025\/09\/2017120509341100149.jpg 500w, https:\/\/www.oa-cagliari.inaf.it\/wp-content\/uploads\/2025\/09\/2017120509341100149-300x225.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>The African VLBI Network aims to enable participation in SKA pathfinder development by amongst others, converting large antennas into radio astronomy telescopes. In this talk I will discuss the electromagnetic analysis of the first of these, a highly shaped 32-m telecommunications dish in Kutunse, Ghana, with analysis and characterisation at 5 and 6.7 GHz.<\/p>\n<p>In particular, I will focus on the effects of the slanted beam-waveguide and mechanical tolerances and highlight antenna efficiencies as well as efforts underway to measure the surface errors. I will also discuss comparisons made to astronomical observations, and the result of utilising the telescope outside its originally intended purpose. For interest sake, I will touch briefly on the SKA precursor, MeerKAT, by looking at how aperture efficiency measuring techniques are used to verify the performance of individual antennas.<\/p>\n","protected":false},"template":"","class_list":["post-4671","seminari","type-seminari","status-publish","hentry","categorie_seminari-colloquium"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/seminari\/4671","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/seminari"}],"about":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/types\/seminari"}],"wp:attachment":[{"href":"https:\/\/www.oa-cagliari.inaf.it\/en\/wp-json\/wp\/v2\/media?parent=4671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}