Deep multiredshift limits on Epoch of Reionization 21 cm power spectra from four seasons of Murchison Widefield Array observations

…, JH Cook, G Sleap, SJ Tingay, D Ung… - Monthly Notices of …, 2020 - academic.oup.com
We compute the spherically averaged power spectrum from four seasons of data obtained
for the Epoch of Reionization (EoR) project observed with the Murchison Widefield Array (…

Computational electromagnetics for the SKA-Low prototype station AAVS2

…, P Di Ninni, M Grazia Labate, D Ung… - Journal of …, 2022 - spiedigitallibrary.org
We summarize the activities conducted since 2019 in the numerical electromagnetic
analysis of one prototype station of the SKA-Low telescope. Working closely with the SKA …

The engineering development array: a low frequency radio telescope utilising SKA precursor technology

…, K Steele, A Sutinjo, SJ Tingay, D Ung… - Publications of the …, 2017 - cambridge.org
We describe the design and performance of the Engineering Development Array, which is a
low-frequency radio telescope comprising 256 dual-polarisation dipole antennas working as …

Electromagnetic modelling of the SKA-LOW AAVS1. 5 prototype

…, P Di Ninni, R Steiner, S Tingay, D Ung… - 2019 international …, 2019 - ieeexplore.ieee.org
The numerical modelling of the Square Kilometre Array (SKA) Aperture Array Verification
System Version 1.5 is discussed. The role of this SKA prototype is placed within the perspective …

System design and calibration of SITARA—a global 21 cm short spacing interferometer prototype

…, B McKinley, CM Trott, J Jones, DCX Ung - Publications of the …, 2022 - cambridge.org
Global 21-cm experiments require exquisitely precise calibration of the measurement systems
in order to separate the weak 21-cm signal from Galactic and extragalactic foregrounds as …

A survey of spatially and temporally resolved radio frequency interference in the FM band at the Murchison Radio-astronomy Observatory

…, M Sokolowski, R Wayth, D Ung - Publications of the …, 2020 - cambridge.org
We present the first survey of radio frequency interference (RFI) at the future site of the low
frequency Square Kilometre Array (SKA), the Murchison Radio-astronomy Observatory (MRO)…

Noise temperature of phased array radio telescope: the Murchison widefield array and the Engineering Development Array

DCX Ung, M Sokolowski, AT Sutinjo… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
This article presents a framework to compute the receiver noise temperature ( $T_{\mathrm {rcv}}$
) of two low-frequency radio telescopes, the Murchison Widefield Array (MWA), and …

Evaluating an alternate layout for the SKA-Low aperture array stations using Computational Electromagnetic simulations

…, R Braun, P Di Ninni, D Ung - 2022 international …, 2022 - ieeexplore.ieee.org
The current prototype station for the SKA-Low radio telescope consists of a large number of
antennas quasi-randomly distributed in close proximity to one another. An alternate, more …

Cold-source noise measurement of a differential input single-ended output low-noise amplifier connected to a low-frequency radio astronomy antenna

AT Sutinjo, DCX Ung… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
We present two methods for measuring the noise temperature of a differential input single-ended
output low-noise amplifier (DISO LNA) connected to an antenna. The first method is the …

What Is in Your Smart Beta Portfolio? A Fundamental and Macroeconomic Analysis

D Ung, P Luk - The Journal of Index Investing, 2016 - search.proquest.com
With smart beta becoming increasingly popular, a swath of strategies have been designed to
provide access to a wide array of return-enhancing risk in the marketplace. Many strategies …