The low frequency receivers for SKA 1-low: Design and verification

Benthem, P.; Gerbers, M.; Vaate, J.G. Bij de; Wynholds, Stefan; Bast, J.; Booler, T.; Colgate, Tim; Crosse, B.; Emrich, D.; Hall, Peter; Juswardy, Budi; Kerniey, David; Schlagenhaufer, F.; Sokołowski, M.; Sutinjo, Adrian; Ung, D.; Wayth, R. B.; Williams, A.; Alderighi, M.; Bolli, Pietro; Comoretto, G.; Mattana, A.; Monari, Jader; Naldi, G.; Perini, Federico; Pupillo, G.; Rusticelli, Simone; Schiaffmo, Marco; Schillirò, F.; Aminei, Amin; Chiello, Riccardo; Jones, M. E.; Baker, J.; Bennett, Richard; Kaligeridou, Georgina; Roberts, M. W.; Schnetler, Hermine; Abraham, Jens; Acedo, Eloy de Lera; Faulkner, A. J.; Razavi-Ghods, Nima; Cutajar, D.; DeMarco, Andrea; Magro, Alessio; Adami, Kristian Zarb

doi:10.23919/ursigass.2017.8104992

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…Finally, future upgrades of the MWA may include (but are not limited to) retrofitting RFoF transmitters to core tiles to improve the bandpass spectral smoothness; adding more tiles to further extend the maximum baseline; changing the low frequency cutoff of the analogue components to 50 MHz (since the dipoles have been shown to perform down to 50 MHz with modified Low-Noise Amplifiers in the Engineering Development Array ('EDA', Wayth et al, 2017); and fully integrating the signal paths from the EDA, SKA Low Aperture Array Verification System (Benthem et al, 2017) and other SKA Low prototype systems.…”

Section: Resultsmentioning

confidence: 99%

“…The design, construction, commissioning, and operation of the MWA has generated deep experience that is directly relevant to SKA Low. In addition, the MWA has been directly utilised as a development platform to prototype and test various sub-systems for SKA Low (e.g Sutinjo et al, 2015;Benthem et al, 2017;Wayth et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the MWA has been directly utilised as a development platform to prototype and test various subsystems for SKA Low (e.g. Sutinjo et al 2015;Benthem et al 2017;Wayth et al 2017).…”

Section: Introductionmentioning

confidence: 99%

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The Phase II Murchison Widefield Array: Design overview

Wayth

Tingay

Trott

et al. 2018

Publ. Astron. Soc. Aust.

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250

197

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We describe the motivation and design details of the "Phase II" upgrade of the Murchison Widefield Array (MWA) radio telescope. The expansion doubles to 256 the number of antenna tiles deployed in the array. The new antenna tiles enhance the capabilities of the MWA in several key science areas. Seventy-two of the new tiles are deployed in a regular configuration near the existing MWA core. These new tiles enhance the surface brightness sensitivity of the MWA and will improve the ability of the MWA to estimate the slope of the Epoch of Reionisation power spectrum by a factor of ∼3.5. The remaining 56 tiles are deployed on long baselines, doubling the maximum baseline of the array and improving the array u, v coverage. The improved imaging capabilities will provide an order of magnitude improvement in the noise floor of MWA continuum images. The upgrade retains all of the features that have underpinned the MWA's success (large field-of-view, snapshot image quality, pointing agility) and boosts the scientific potential with enhanced imaging capabilities and by enabling new calibration strategies.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Phase II Murchison Widefield Array: Design overview

Wayth

Tingay

Trott

et al. 2018

Publ. Astron. Soc. Aust.

Self Cite

250

197

View full text Add to dashboard Cite

show abstract

“…The design and requirements specification process for SKA-Low has been a long one, moving through many stages of antenna selection, subsystem design, unit development and prototyping, and small-scale deployments to the MRO, culminating in the deployment of a full-scale prototype station called Aperture Array Verification System 1 (AAVS1) in 2016 and 2017. [10][11][12] In the time leading up to AAVS1, the baseline design for SKA1-Low used the SKALA2 13 antenna. In addition, as part of an SKA cost control process in 2015-2016, another prototype station using MWA-style dipoles and a hybrid beamforming architecture, called the Engineering Development Array 14 (EDA) was also deployed.…”

Section: Introductionmentioning

confidence: 99%

The Engineering Development Array 2: design, performance and lessons from an SKA-Low prototype station

Wayth¹,

Sokołowski²,

Broderick³

et al. 2021

Preprint

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We present the Engineering Development Array 2, which is one of two instruments built as a second generation prototype station for the future Square Kilometre Array Low Frequency Array. The array is comprised of 256 dual-polarization dipole antennas that can work as a phased array or as a standalone interferometer. We describe the design of the array and the details of design changes from previous generation instruments, as well as the motivation for the changes. Using the array as an imaging interferometer, we measure the sensitivity of the array at five frequencies ranging from 70 to 320 MHz.

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