Following the reported detection of an absorption profile associated with the
21~cm sky-averaged signal from the Cosmic Dawn by the EDGES experiment in 2018,
a number of experiments have been set up to verify this result. This paper
discusses the design process used for global 21~cm experiments, focusing
specifically on the Radio Experiment for the Analysis of Cosmic Hydrogen
(REACH). This experiment will seek to understand and compensate for systematic
errors present using detailed modelling and characterization of the
instrumentation. There is detailed the quantitative figures of merit and
numerical modelling used to assist the design process of the REACH dipole
antenna (one of the 2 antenna designs for REACH Phase I). This design process
produced a 2.5:1 frequency bandwidth dipole. The aim of this design was to
balance spectral smoothness and low impedance reflections with the ability to
describe and understand the antenna response to the sky signal to inform the
critically important calibration during observation and data analysis.
Description
Radio antenna design for sky-averaged 21 cm cosmology experiments: the REACH case
%0 Generic
%1 cumner2021radio
%A Cumner, J.
%A Acedo, E. De Lera
%A de Villiers, D. I. L.
%A Anstey, D.
%A Kolitsidas, C. I.
%A Gurdon, B.
%A Fagnoni, N.
%A Alexander, P.
%A Bernardi, G.
%A Bevins, H. T. J.
%A Carey, S.
%A Cavillot, J.
%A Chiello, R.
%A Craeye, C.
%A Croukamp, W.
%A Ely, J. A.
%A Fialkov, A.
%A Gessey-Jones, T.
%A Gueuning, Q.
%A Handley, W.
%A Hills, R.
%A Josaitis, A. T.
%A Kulkarni, G.
%A Magro, A.
%A Maiolino, R.
%A Meerburg, P. D.
%A Mittal, S.
%A Pritchard, J. R.
%A Puchwein, E.
%A Razavi-Ghods, N.
%A Roque, I. L. V.
%A Saxena, A.
%A Scheutwinkel, K. H.
%A Shen, E.
%A Sims, P. H.
%A Smirnov, O.
%A Spinelli, M.
%A Zarb-Adami, K.
%D 2021
%K library
%T Radio antenna design for sky-averaged 21 cm cosmology experiments: the
REACH case
%U http://arxiv.org/abs/2109.10098
%X Following the reported detection of an absorption profile associated with the
21~cm sky-averaged signal from the Cosmic Dawn by the EDGES experiment in 2018,
a number of experiments have been set up to verify this result. This paper
discusses the design process used for global 21~cm experiments, focusing
specifically on the Radio Experiment for the Analysis of Cosmic Hydrogen
(REACH). This experiment will seek to understand and compensate for systematic
errors present using detailed modelling and characterization of the
instrumentation. There is detailed the quantitative figures of merit and
numerical modelling used to assist the design process of the REACH dipole
antenna (one of the 2 antenna designs for REACH Phase I). This design process
produced a 2.5:1 frequency bandwidth dipole. The aim of this design was to
balance spectral smoothness and low impedance reflections with the ability to
describe and understand the antenna response to the sky signal to inform the
critically important calibration during observation and data analysis.
@misc{cumner2021radio,
abstract = {Following the reported detection of an absorption profile associated with the
21~cm sky-averaged signal from the Cosmic Dawn by the EDGES experiment in 2018,
a number of experiments have been set up to verify this result. This paper
discusses the design process used for global 21~cm experiments, focusing
specifically on the Radio Experiment for the Analysis of Cosmic Hydrogen
(REACH). This experiment will seek to understand and compensate for systematic
errors present using detailed modelling and characterization of the
instrumentation. There is detailed the quantitative figures of merit and
numerical modelling used to assist the design process of the REACH dipole
antenna (one of the 2 antenna designs for REACH Phase I). This design process
produced a 2.5:1 frequency bandwidth dipole. The aim of this design was to
balance spectral smoothness and low impedance reflections with the ability to
describe and understand the antenna response to the sky signal to inform the
critically important calibration during observation and data analysis.},
added-at = {2021-09-22T06:30:24.000+0200},
author = {Cumner, J. and Acedo, E. De Lera and de Villiers, D. I. L. and Anstey, D. and Kolitsidas, C. I. and Gurdon, B. and Fagnoni, N. and Alexander, P. and Bernardi, G. and Bevins, H. T. J. and Carey, S. and Cavillot, J. and Chiello, R. and Craeye, C. and Croukamp, W. and Ely, J. A. and Fialkov, A. and Gessey-Jones, T. and Gueuning, Q. and Handley, W. and Hills, R. and Josaitis, A. T. and Kulkarni, G. and Magro, A. and Maiolino, R. and Meerburg, P. D. and Mittal, S. and Pritchard, J. R. and Puchwein, E. and Razavi-Ghods, N. and Roque, I. L. V. and Saxena, A. and Scheutwinkel, K. H. and Shen, E. and Sims, P. H. and Smirnov, O. and Spinelli, M. and Zarb-Adami, K.},
biburl = {https://www.bibsonomy.org/bibtex/2ff2a592bb940c34bc6948579b8d49773/gpkulkarni},
description = {Radio antenna design for sky-averaged 21 cm cosmology experiments: the REACH case},
interhash = {0a8e1edc491d5050d263c3b40c887c4d},
intrahash = {ff2a592bb940c34bc6948579b8d49773},
keywords = {library},
note = {cite arxiv:2109.10098Comment: 32 pages, 30 figures, to be submitted to the Journal of Astronomical Instrumentation},
timestamp = {2021-09-22T06:30:24.000+0200},
title = {Radio antenna design for sky-averaged 21 cm cosmology experiments: the
REACH case},
url = {http://arxiv.org/abs/2109.10098},
year = 2021
}