NAVARRINI, AlessandroAlessandroNAVARRINIMONARI, JADERJADERMONARISCALAMBRA, ALESSANDROALESSANDROSCALAMBRAMELIS, AndreaAndreaMELISCONCU, RaimondoRaimondoCONCUNALDI, GiovanniGiovanniNALDIMACCAFERRI, ANDREAANDREAMACCAFERRICATTANI, ALESSANDROALESSANDROCATTANIORTU, PierluigiPierluigiORTURODA, JURIJURIRODAPERINI, FEDERICOFEDERICOPERINICOMORETTO, GiovanniGiovanniCOMORETTOMORSIANI, MARCOMARCOMORSIANILADU, AdelaideAdelaideLADURUSTICELLI, SIMONESIMONERUSTICELLIMATTANA, AndreaAndreaMATTANAMARONGIU, PasqualinoPasqualinoMARONGIUSABA, AndreaAndreaSABASCHIAFFINO, MARCOMARCOSCHIAFFINOCARRETTI, ETTOREETTORECARRETTISCHILLIRO', FRANCESCOFRANCESCOSCHILLIRO'URRU, EnricoEnricoURRUPUPILLO, GiuseppeGiuseppePUPILLOPOLONI, MARCOMARCOPOLONIPISANU, ToninoToninoPISANUNESTI, RenzoRenzoNESTIMUNTONI, GIACOMOGIACOMOMUNTONIZarb Adami, KrisKrisZarb AdamiMagro, AlessioAlessioMagroChiello, RiccardoRiccardoChielloLiu, LeiLeiLiuGrainge, KeithKeithGraingeKeith, MichaelMichaelKeithPantaleev, M.M.Pantaleevvan Cappellen, WimWimvan Cappellen2020-11-112020-11-112018978-88-907599-2-5http://hdl.handle.net/20.500.12386/28254We describe the design and architecture of PHAROS2, a cryogenically cooled 4-8 GHz Phased Array Feed (PAF) demonstrator with a digital beamformer for radio astronomy application. The instrument will be capable of synthesizing four independent single-polarization beams by combining 24 active elements of an array of Vivaldi antennas. PHAROS2, the upgrade of PHAROS (PHased Arrays for Reflector Observing Systems), features: a) commercial cryogenic LNAs with state-of-the-art performance, b) a “Warm Section” for signal filtering, conditioning and single downconversion to select a ≈275 MHz Intermediate Frequency (IF) bandwidth within the 4-8 GHz Radio Frequency (RF) band, c) an IF signal transportation by analog WDM (Wavelength Division Mutiplexing) fiber-optic link, and d) a FPGA-based Italian Tile Processing Module (iTPM) digital backend.ELETTRONICOenConference paperhttp://www.elettromagnetismo.it/wp-content/uploads/2018/09/XXII-RiNEm-Conference-Proceedings.pdfhttps://sites.unica.it/rinem2018/FIS/05 - ASTRONOMIA E ASTROFISICA