Journal ArticleDOI
Design Study of an L-Band Phased Array Feed for Wide-Field Surveys and Vibration Compensation on FAST
TLDR
An L-band PAF front end design is presented for the Five-hundred-meter Aperture Spherical Telescope (FAST), which is currently under construction and when complete will be the largest single dish radio telescope in the world.Abstract:
Phased array feeds (PAFs) for large diameter single dish radio telescopes offer the capability for multiple simultaneous beam formation and wide field-of-view surveys An L-band PAF front end design is presented for the Five-hundred-meter Aperture Spherical Telescope (FAST), which is currently under construction and when complete will be the largest single dish radio telescope in the world A broadband PAF element at L-band was designed in conjunction with the FAST optics and focal plane field distribution, fabricated, and tested The simulated performance of the array meets the FAST PAF performance requirements for field of view, efficiency, sensitivity, and other key parameters A unique aspect of the FAST PAF is the need for feed cabin vibration compensation A study of the use of adaptive beamforming to compensate for lateral movement is givenread more
Citations
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Book
Phased Arrays for Radio Astronomy, Remote Sensing, and Satellite Communications
TL;DR: Find a modern approach to the analysis, modeling and design of high sensitivity phased arrays by combining network theory, numerical methods and computational electromagnetic simulation techniques to enable full system analysis and design optimization.
Journal ArticleDOI
High-Sensitivity Phased Array Receivers for Radio Astronomy
TL;DR: An overview of research progress, current and planned array-based instruments, and open challenges in these areas related to the new generation of sparse arrays, PAFs, and AAs that are in development for astronomical observatories around the world are given.
Journal ArticleDOI
Phase-Compensated Conformal Antennas for Changing Spherical Surfaces
TL;DR: In this paper, the authors investigated the relationship between the radius of the spherical surface, element spacing of the conformal array and required phase compensation, and showed that it is possible to recover the radiation pattern autonomously.
Proceedings ArticleDOI
Measuring radiotelescope phased array feed noise and sensitivity
Douglas B. Hayman,Aaron Chippendale,Aidan Hotan,Robert D. Shaw,Stuart G. Hay,Trevor S. Bird,Peter J. Hall,Karu P. Esselle +7 more
TL;DR: In this article, the authors focus on measuring the equivalent noise temperature and the sensitivity of these feeds and outline the differences between characterizing phased array feeds compared with traditional single horn feeds and provide results from their experience in developing phased array feed for the Australian Square Kilometre Array Pathfinder.
Book ChapterDOI
Broadside Pattern Correction Techniques for Conformal Antenna Arrays
TL;DR: It is shown that the maximum broadside gain compensated is still less than the gain of a linear flat array for any surface deformation.
References
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Journal ArticleDOI
The five-hundred-meter aperture spherical radio telescope (fast) project
Rendong Nan,Di Li,Di Li,Chengjin Jin,Wang Qiming,Lichun Zhu,Wenbai Zhu,Haiyan Zhang,Youling Yue,Lei Qian +9 more
TL;DR: Wang et al. as discussed by the authors proposed the Five Hundred Meter Aperture Spherical Radio Telescope (FAST) to build the largest single-dish radio telescope in the world.
Journal ArticleDOI
Signal Processing for Phased Array Feeds in Radio Astronomical Telescopes
Brian D. Jeffs,Karl F. Warnick,Jonathan Landon,Jacob Waldron,David Jones,J. R. Fisher,Roger D. Norrod +6 more
TL;DR: A calibration and beamforming strategy for PAFs including interference mitigation with power spectral density (PSD) estimation bias correction and validated using numerical simulations and experimental data from a 19-element PAF on the Green Bank 20-m telescope is proposed.
Proceedings ArticleDOI
APERTIF: Phased array feeds for the westerbork synthesis radio telescope
Wim A. van Cappellen,L. Bakker +1 more
TL;DR: APERTIF as discussed by the authors is a PAF system that is being developed for the Westerbork Synthesis Radio Telescope (WSRT) to increase its survey speed with a factor 20.
Journal ArticleDOI
Demonstration of a Dual-Polarized Phased-Array Feed
Bruce Veidt,G. J. Hovey,T. Burgess,R J Smegal,Rob Messing,A. G. Willis,A. D. Gray,P. E. Dewdney +7 more
TL;DR: In this article, a dual-polarized phased-array feed (PAF) was designed and constructed with the purpose of demonstrating this technology as a means of expanding the instantaneous field-of-view of radio telescopes.