NDLI: Off-axis beam performance of Focal Plane Arrays for the Westerbork Synthesis Radio Telescope

Content Provider	IEEE Xplore Digital Library
Author	Ivashina, M.V. Iupikov, O.A. Maaskant, R. van Cappellen, W.A. Bakker, L. Oosterloo, T.
Copyright Year	2009
Description	Author affiliation: ASTRON, P.O. Box 2, 7990 AA Dwingeloo, The Netherlands (Ivashina, M.V.; Maaskant, R.; van Cappellen, W.A.; Bakker, L.; Oosterloo, T.) \|\| Sevastopol National Technical University, Radio Engineering Dept., Ukraine (Iupikov, O.A.)
Abstract	This paper reports on the off-axis beam performance of reflector antennas fed by Focal Plane Arrays (FPAs). The FPAs are comprised of many electrically small (≪ 0.5λ) elements that can be used to generate multiple closely overlapping beams on the sky. As a result, both the size and continuity of the telescope's Field Of View (FOV) can be substantially improved with respect to conventional reflector systems fed by single-horn or cluster feeds in a one-horn-per-beam configuration. The size of the FOV, in combination with the system sensitivity and instantaneous bandwidth, constitutes an important figure of merit, that is, FOV × BandWidth × $Sensitivity^{2},$ and is proportional to the survey speed of a telescope which should be maximized. One example of such a design, based on this new technology, is APERTIF [1], which aims at increasing the survey speed of the Westerbork Synthesis Radio Telescope (WSRT) with a factor of ∼20.
Starting Page	1
Ending Page	4
File Size	967632
Page Count	4
File Format	PDF
ISBN	9781424436477
ISSN	15223965
DOI	10.1109/APS.2009.5171751
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-06-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio astronomy Prototypes Transmission line matrix methods Telescopes Circuit noise Bandwidth Array signal processing Matrix decomposition Design engineering Reflector antennas
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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