Title :
One Square Metre of a Million
Author :
Hampson, Grant ; Smolders, Bart ; Joseph, Antony
Author_Institution :
Netherlands Foundation for Research in Astronomy, Postbus 2, 7990 AA Dwingeloo, The Netherlands. e-mail: hampson@nfra.nl, phone: +31 521 595 100, fax: +31 521 597 332
Abstract :
The One Square Metre Array (OSMA) is the second of three stages leading to the Square Kilometre Array (SKA). The SKA telescope will be sought after by astronomers around the globe, as its sensitivity to astronomical sources will be greater than two orders of magnitude better than current telescopes. The OSMA system consists of two beam-forming stages - RF and Digital. In this paper the RF beamformer is discussed in detail and recent findings presented. One of the major features of the RF beamformer is its large instantaneous bandwidth which is due to the fact that time delays are used to form beams.
Keywords :
Adaptive arrays; Antenna arrays; Array signal processing; Bandwidth; Broadband antennas; Delay effects; Frequency conversion; Radio frequency; Radiofrequency interference; Telescopes;
Conference_Titel :
Microwave Conference, 1999. 29th European
Conference_Location :
Munich, Germany
DOI :
10.1109/EUMA.1999.338353
