We describe the design and architecture of PHAROS2, a cryogenically cooled 4-8 GHz Phased Array Feed (PAF) demonstrator with 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. PHAROS2 will be mounted at the primary focus of the 76-m diameter Lovell radio telescope (Jodrell Bank Observatory, UK) for technical and scientific validation.
|Title of host publication||2018 2nd URSI Atlantic Radio Science Meeting, AT-RASC 2018|
|Publication status||Published - 24 Sept 2018|
|Event||2nd URSI Atlantic Radio Science Meeting, AT-RASC 2018 - Gran Canaria, Spain|
Duration: 28 May 2018 → 1 Jun 2018
|Conference||2nd URSI Atlantic Radio Science Meeting, AT-RASC 2018|
|Period||28/05/18 → 1/06/18|