SKA Aperture Array Verification System: Electromagnetic modeling and beam pattern measurements using a micro UAV
Autor: | Paolo Felice Maschio, E. Colin-Beltran, E. de Lera Acedo, Andrea Maria Lingua, Giovanni Naldi, Nima Razavi-Ghods, Marco Piras, Jader Monari, Irene Aicardi, Pietro Bolli, Fabio Paonessa, Giuseppe Pupillo, Giuseppe Virone |
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Přispěvatelé: | De Lera Acedo, Eloy [0000-0001-8530-6989], Razavi-Ghods, Nima [0000-0003-2930-5396], Apollo - University of Cambridge Repository, GBR |
Rok vydání: | 2017 |
Předmět: |
Computer science
Acoustics Ultra-wideband FOS: Physical sciences 02 engineering and technology Low frequency radio astronomy 01 natural sciences Unmanned aerial vehicles Square (algebra) law.invention Telescope beam pattern measurements law 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Calibration unmanned aerial vehicle 010303 astronomy & astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) Astrophysics::Instrumentation and Methods for Astrophysics phased arrays 020206 networking & telecommunications Astronomy and Astrophysics Radio astronomy Beam pattern measurements Phased arrays Space and Planetary Science Computational electromagnetics Stage (hydrology) Astrophysics - Instrumentation and Methods for Astrophysics |
Zdroj: | Experimental astronomy (Dordr., Online) 45 (2018): 1–20. doi:10.1007/s10686-017-9566-x info:cnr-pdr/source/autori:de Lera Acedo E.; Bolli P., Paonessa F., Virone G., Colin-Beltran E., Razavi-Ghods N., Aicardi I., Lingua A., Maschio P., Monari J., Naldi G., Piras M., Pupillo G./titolo:SKA aperture array verification system: electromagnetic modeling and beam pattern measurements using a micro UAV/doi:10.1007%2Fs10686-017-9566-x/rivista:Experimental astronomy (Dordr., Online)/anno:2018/pagina_da:1/pagina_a:20/intervallo_pagine:1–20/volume:45 |
DOI: | 10.48550/arxiv.1703.00537 |
Popis: | In this paper we present the electromagnetic modeling and beam pattern measurements of a 16-elements ultra wideband sparse random test array for the low frequency instrument of the Square Kilometer Array telescope. We discuss the importance of a small array test platform for the development of technologies and techniques towards the final telescope, highlighting the most relevant aspects of its design. We also describe the electromagnetic simulations and modeling work as well as the embedded-element and array pattern measurements using an Unmanned Aerial Vehicle system. The latter are helpful both for the validation of the models and the design as well as for the future instrumental calibration of the telescope thanks to the stable, accurate and strong radio frequency signal transmitted by the UAV. At this stage of the design, these measurements have shown a general agreement between experimental results and numerical data and have revealed the localized effect of un-calibrated cable lengths in the inner side-lobes of the array pattern. This research was supported by the Science & Technology Facilities Council (UK) grant: SKA, ST/M001393/1 and the University of Cambridge, UK. This work is also part of the activities included in the “Advanced calibration techniques for next generation low-frequency radio astronomical arrays” project supported by the 2014 TECNO INAF funds. |
Databáze: | OpenAIRE |
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