Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Daniel C X Ung"'
Autor:
Daniel C. X. Ung
Publikováno v:
2023 5th Australian Microwave Symposium (AMS).
Autor:
Daniel C. X. Ung, David B. Davidson
Publikováno v:
2022 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (AP-S/URSI).
Autor:
A. Bart Smolders, Mark J. Bentum, Rowanne Steiner, Anouk Hubrechsen, Daniel C. X. Ung, Robert D. Jones, Randall B. Wayth
Publikováno v:
Applied Computational Electromagnetics Society Journal, 35(10), 1153-1160. Applied Computational Electromagnetics Society (ACES)
The far-field pattern of a geometrically large and complex antenna used in low-frequency radio astronomy is computationally expensive to simulate on electromagnetic simulators, such as FEKO. For example, one station of the Square Kilometer Array, whi
Autor:
David B Davidson, Daniel C X Ung
Publikováno v:
2022 16th European Conference on Antennas and Propagation (EuCAP).
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 well as instrumental systematics. Hitherto, experiments aiming to ma
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::557a2140ec63d365c2004c7aa9fe44d2
http://arxiv.org/abs/2203.10466
http://arxiv.org/abs/2203.10466
Publikováno v:
IEEE Transactions on Antennas and Propagation. 68:5395-5404
This paper presents a framework to compute the receiver noise temperature (Trcv) of two low-frequency radio telescopes, the Murchison Widefield Array (MWA) and the Engineering Development Array (EDA). The MWA was selected because it is the only opera
Autor:
A. Mattana, David B. Davidson, Federico Perini, Andrew McPhail, Riccardo Chiello, Alessio Magro, Randall B. Wayth, Gianni Bernardi, G. Sleap, Gianni Comoretto, Marcin Sokolowski, Danny C. Price, Steven Tingay, Andrew Williams, Jader Monari, Daniel C. X. Ung, J. W. Broderick, Giuseppe Pupillo, Brian Crosse, Giulia Macario, D. Minchin, Pietro Bolli, N. D. R. Bhat
We present the first southern-hemisphere all-sky imager and radio-transient monitoring system implemented on two prototype stations of the low-frequency component of the Square Kilometre Array. Since its deployment the system has been used for real-t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::868fa961f14c9ea26f6c7968e23f1716
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), that both temporally and spatially resolves the RFI. The survey i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7f7d6fe531ab4cdc3263276901741d5
http://arxiv.org/abs/2008.05918
http://arxiv.org/abs/2008.05918
Autor:
Maria Kovaleva, Marcin Sokolowski, Daniel C. X. Ung, Adrian Sutinjo, Steven Tingay, J. W. Broderick, Randall B. Wayth, David B. Davidson
Publikováno v:
Astronomy & Astrophysics. 646:A143
Aims: This paper aims to derive an expression for the sensitivity of a polarimetric radio interferometer that is valid for all-sky observations of arbitrarily polarized sources, with neither a restriction on FoV nor with any a priori assumption regar
We present two methods for measuring the noise temperature of a differential input single-ended output (DISO) Low-Noise Amplifier (LNA) connected to an antenna. The first method is direct measurement of the DISO LNA and antenna in an anechoic chamber
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93aad2779f6d4f0a06f1328b90c59cb9