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10- to 19.5-GHz microwave receiver of an electro-optical interferometer for radio astronomy
Identificadores del recurso
2329-4221
2329-4124
ESP2015-70646-C2-2-R
http://hdl.handle.net/10902/17213
10.1117/1.JATIS.5.3.035007
Procedencia
(Repositorio Abierto de la Universidad de Cantabria)

Ficha

Título:
10- to 19.5-GHz microwave receiver of an electro-optical interferometer for radio astronomy
Tema:
Interferometer
Cosmic microwave background
Stokes parameters
Radio astronomy
Polarimeter
Descripción:
This document describes the analysis, design, and prototype test results of the microwave section of a 10- to 19.5-GHz interferometer, aimed at obtaining polarization data of cosmic microwave background (CMB) radiation from the sky. First, receiver analysis is thoroughly assessed to study the contribution of each subsystem when obtaining the Stokes parameters of an input signal. Then, the receiver design is detailed starting from the front-end module, which works at cryogenic temperature, composed of a set of passive components: feedhorn, orthomode transducer, and polarizer, together with active components, such as very low-noise amplifiers. The back-end module (BEM) is directly connected, working at room temperature for further amplification, phase switching, and correlation of the signals. Moreover, the whole frequency band is split into two sub-bands (10 to 14 GHz and 16 to 20 GHz) using a high selective diplexer in the BEM in order to reject radiofrequency interferences. Phase switches allow phase difference steps of 5.625 deg, which modulate the correlated outputs to reduce systematic effects in the postdetection signal processing. Finally, measurements of all the subsystems comprising the microwave section of the receiver as well as the characterization of the complete microwave receiver are presented. The obtained results demonstrate successful performance of the microwave receiver that, together with an electro-optical correlator and a near-infrared camera, comprises the interferometer. Moreover, synthesized images corresponding to combinations of the Stokes parameters can be obtained with the whole system.
The authors would like to thank the Spanish Ministry of Economy, Industry, and Competitiveness for financial support provided through the grant ESP2015-70646-C2-2-R. The authors thank Eva Cuerno for her assistance during the assembly of the circuits.
Fuente:
Journal of Astronomical Telescopes, Instruments, and Systems, 2019, 5(3), 035007
Idioma:
English
Relación:
https://doi.org/10.1117/1.JATIS.5.3.035007
Autor/Productor:
Aja Abelán, Beatriz
Fuente Rodríguez, Luisa María de la
Artal Latorre, Eduardo
Villa Benito, Enrique
Cano de Diego, Juan Luis
Mediavilla Sánchez, Ángel
Editor:
SPIE
Otros colaboradores/productores:
Universidad de Cantabria
Derechos:
© 2019 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
http://creativecommons.org/licenses/by/4.0/
openAccess
Fecha:
2019-11-08T08:46:40Z
2019-08-16
Tipo de recurso:
info:eu-repo/semantics/article
publishedVersion

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    9. <dc:subject>Interferometer</dc:subject>

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    14. <dc:description>This document describes the analysis, design, and prototype test results of the microwave section of a 10- to 19.5-GHz interferometer, aimed at obtaining polarization data of cosmic microwave background (CMB) radiation from the sky. First, receiver analysis is thoroughly assessed to study the contribution of each subsystem when obtaining the Stokes parameters of an input signal. Then, the receiver design is detailed starting from the front-end module, which works at cryogenic temperature, composed of a set of passive components: feedhorn, orthomode transducer, and polarizer, together with active components, such as very low-noise amplifiers. The back-end module (BEM) is directly connected, working at room temperature for further amplification, phase switching, and correlation of the signals. Moreover, the whole frequency band is split into two sub-bands (10 to 14 GHz and 16 to 20 GHz) using a high selective diplexer in the BEM in order to reject radiofrequency interferences. Phase switches allow phase difference steps of 5.625 deg, which modulate the correlated outputs to reduce systematic effects in the postdetection signal processing. Finally, measurements of all the subsystems comprising the microwave section of the receiver as well as the characterization of the complete microwave receiver are presented. The obtained results demonstrate successful performance of the microwave receiver that, together with an electro-optical correlator and a near-infrared camera, comprises the interferometer. Moreover, synthesized images corresponding to combinations of the Stokes parameters can be obtained with the whole system.</dc:description>

    15. <dc:description>The authors would like to thank the Spanish Ministry of Economy, Industry, and Competitiveness for financial support provided through the grant ESP2015-70646-C2-2-R. The authors thank Eva Cuerno for her assistance during the assembly of the circuits.</dc:description>

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