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http://hdl.handle.net/20.500.12386/29028
Title: | The Warm Receiver Section and the Digital Backend of the PHAROS2 Phased Array Feed | Authors: | NAVARRINI, Alessandro SCALAMBRA, ALESSANDRO MELIS, Andrea RUSTICELLI, SIMONE CONCU, Raimondo ORTU, Pierluigi NALDI, Giovanni PUPILLO, Giuseppe MACCAFERRI, ANDREA CATTANI, ALESSANDRO LADU, Adelaide SCHIRRU , LUCA PERINI, FEDERICO MORSIANI, MARCO MONARI, JADER RODA, JURI MARONGIU, Pasqualino SABA, Andrea POLONI, MARCO SCHIAFFINO, MARCO MATTANA, Andrea BIANCHI, GERMANO COMORETTO, Giovanni NESTI, Renzo URRU, Enrico PISANU, Tonino SCHILLIRO', FRANCESCO Zarb Adami, Kris Magro Alessio Chiello Riccardo |
Issue Date: | 2019 | Volume: | 2019 IEEE International Symposium on Phased Array System & Technology (PAST) | First Page: | 1 | Abstract: | We describe the development of a multi-channel “warm receiver section” (WS) and of a digital beamformer for the PHAROS2 Phased Array Feed (PAF), a PAF demonstrator for radio astronomy application across the 4-8 GHz radio frequency (RF) band. The PAF is based on an array of 10×11 dual-polarization Vivaldi antennas cryogenically cooled at 20 K along with low noise amplification modules (LNAs). The WS receiver can process the signals from a subset of 24 antenna elements of the array by downconverting them to an intermediate frequency (IF) range, 375-650 MHz, suitable for digitization by the digital beamformer. The latter is based on the iTPM (Italian Tile Processing Module), developed for the Square Kilometer Array (SKA) Low Frequency Aperture Array (LFAA). We modified the iTPM firmware to synthesize four independent beams across the 275 MHz instantaneous IF bandwidth in the iTPM FPGAs (Field Programmable Gate Arrays). The 24 signals are sent from the WS to the iTPM through analogue IFoF (IF over fiber) optical links. In this paper we present the design and performance of the WS and of the digital bemaformer for PHAROS2. | Conference Name: | 2019 IEEE International Symposium on Phased Array System & Technology (PAST) | Conference Place: | Waltham, MA, USA | Conference Date: | 15-18 October, 2019 | URI: | http://hdl.handle.net/20.500.12386/29028 | URL: | https://ieeexplore.ieee.org/document/9021018 | ISBN: | 978-1-7281-3049-1 | DOI: | 10.1109/PAST43306.2019.9021018 | Fulltext: | open |
Appears in Collections: | 3.01 Contributi in Atti di convegno |
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File | Description | Size | Format | |
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c-PID6042641.pdf | postprint | 2.81 MB | Adobe PDF | View/Open |
09021018.pdf | [Administrators only] | 2.8 MB | Adobe PDF |
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