NDLI: A multibeam feed for the Parkes radio-telescope

Content Provider	IEEE Xplore Digital Library
Author	Bird, T.S.
Copyright Year	1994
Description	Author affiliation: Div. of Radiophys., CSIRO, Epping, NSW, Australia (Bird, T.S.)
Abstract	The Parkes radio-telescope is as busy as it ever was in its more than 30-year lifetime. To improve the telescope further, a multiple beam capability is being investigated. This would have considerable impact on a proposed detailed study of the southern sky in the frequency range 1.27 to 1.47 GHz. With the present, single, prime-focus feed, this would take about 10 years to complete, but by using multiple beams, each with two orthogonal linear polarizations, the survey time would be reduced to a more manageable observing period. A combination of reflector scan-gain loss, as the feeds are displaced from the focus, and the limited number of available correlator units, restricts a practical array to about nine elements which, nevertheless, gives a substantial order of magnitude reduction in observing time. We describe here a preliminary study of the Parkes antenna performance with a cluster of nine feed horns, where each horn in the cluster is responsible for two orthogonal linear polarizations within a beam.<>
Starting Page	966
Ending Page	969
File Size	220714
Page Count	4
File Format	PDF
ISBN	0780320093
DOI	10.1109/APS.1994.407943
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-06-20
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Polarization Antenna feeds Transducers Sampling methods Dielectric losses Apertures Australia Telescopes Frequency Correlators
Content Type	Text
Resource Type	Article

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