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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/24089
Title: Project of a multibeam UHF receiver to improve survey capabilities
Authors: MONTEBUGNOLI, STELIO
BORTOLOTTI, CLAUDIO 
BIANCHI, GERMANO 
MONARI, JADER 
Maccone, Claudio
PERINI, FEDERICO 
ROMA, MAURO 
SCHIAFFINO, MARCO 
Issue Date: 2015
Journal: ACTA ASTRONAUTICA 
Number: 116
First Page: 382
Abstract: The Institute of Radioastronomy (IRA-Bologna) of the National Institute for Astrophysics of Italy (INAF – Rome) joined the European group for the Square Kilometer Array Design Study (SKA-DS) in the frame of the FP6 program. One of the goals of the Design Study was the construction and test of a state of the art very small SKA prototype. A segment (1/8) of the N/S arm of the large Northern Cross array (408 MHz+/−8 MHz) was exploited to obtain a prototype array, made up by 8 cylindrical concentrators (23.5 mt×7.5 mt) equipped with 4 receivers each. In this way a 32 receivers array with a total collecting area of about 1400 m2 was obtained. Signals are directly carried from the receivers, located on the focal lines, down to the back end, located in the processing room, via a very cost effective analog optical links. Here a fast back end, presently based on Field Programmable Gate Array (FPGA) Berkeley-Roach boards, takes care of running the required complex algorithms to perform (non-adaptive) multi-beamforming with a 2D FFT. The main advantage of such an already working array is to produce 21 independent 31’×104’ beams located inside a 38 deg2 Field Of View (FoV). Our plan is to search for funds to refit the remaining 56 cylinders of the N/S arm, to dramatically increase both the sensitivity and number of beams (pixels) placed in the same FoV. In this way, it could be possible to perform a deep SETI survey in the UHF band by an about 11.200 m2 antenna (equivalent to a 119 m dish), a 37.6 deg2 FOV and 189 independent beams. The system could be further expanded by installing more receivers on each N/S focal line, increasing the FOV and the number of pixels with the same sensitivity. Assuming that adequate funds could be found for refitting the giant E/W arm as well, an equivalent 180 m dish could be obtained to perform a very deep SETI sky survey with a 120 deg2 FOV at high sensitivity. This would allow a very fast and deep sky survey in the UHF band.
URI: http://hdl.handle.net/20.500.12386/24089
URL: https://www.sciencedirect.com/science/article/abs/pii/S0094576515003112
ISSN: 0094-5765
DOI: 10.1016/j.actaastro.2015.07.030
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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UNESCO_PARIS_2014_Fin.pdfpostprint725.43 kBAdobe PDFView/Open
Perini-ActaAstr116.pdf[Administrators only]1.62 MBAdobe PDF
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