A C-band broadband ortho-mode transducer for radioastronomy polarimetry

Ferreira, Ivan S.; Tello, Camilo; Bergano, Miguel; Villela, Thyrso; Barbosa, Domingos; Smoot, George F.

doi:10.1186/s40064-016-3761-5

Title: A C-band broadband ortho-mode transducer for radioastronomy polarimetry

Abstract

Background: We describe the design, the construction and performance of a narrow band ortho-mode transducer, currently used in the 5 GHz polarimetric receiver of the Galactic Emission Mapping project. Results: The ortho-mode transducer was designed to achieve a high degree of transmission within the 400 MHz of the GEM band around the 5 GHz (4.8–5.2 GHz). It is composed of a circular-to-square waveguide transition, a septum polarizer, a thin waveguide coupler and a smooth square-to-rectangular waveguide transition with custom waveguide bends to the output ports. Conclusion: Our simulations and measurements show a very low level of cross-polarization of about -60 dB and a good impedance match for all three ports (S11; S22; S33 < -30 dB) with only 0:25 dB of insertion loss offset across the 400 MHz (4.8–5.2 GHz) of the reception bandwidth.

Authors:

Ferreira, Ivan S. ^[1]; Tello, Camilo ^[2];

^[3]; Villela, Thyrso ^[2]; Barbosa, Domingos ^[4]; Smoot, George F. ^[5]

Universidade de Brasília, Campus Universitário Darcy Ribeiro, Brasília (Brazil). Instituto de Física, Laboratório de Cosmologia e Astrofísica
Instituto Nacional de Pesquisas Espaciais (INPE), Sao Paulo (Brazil). Divisão de Astrofísica – DAS
Wiseware Engineered Solutions, Gafanha da Encarnação (Portugal)
Campus Universitário de Santiago, Aveiro (Portugal). Instituto de Telecomunicações, ENGAGE SKA
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. Paris-Diderot, Orsay (France)

Publication Date:: Fri Dec 02 00:00:00 EST 2016

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); Brazilian National Council for Scientific and Technological Development (CNPq); Coordination for the Improvement of Higher Education Personnel (CAPES); Fundação para a Ciência e a Tecnologia (FCT)

OSTI Identifier:: 1627041

Grant/Contract Number:: AC02-05CH11231

Resource Type:: Accepted Manuscript

Journal Name:: SpringerPlus

Additional Journal Information:: Journal Volume: 5; Journal Issue: 1; Journal ID: ISSN 2193-1801

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 79 ASTRONOMY AND ASTROPHYSICS; Science & Technology - Other Topics; Radioastronomy; Polarimeters; Ortho-mode transducers

Citation Formats


                    Ferreira, Ivan S., Tello, Camilo, Bergano, Miguel, Villela, Thyrso, Barbosa, Domingos, and Smoot, George F. A C-band broadband ortho-mode transducer for radioastronomy polarimetry.  United States: N. p., 2016. 
Web.  doi:10.1186/s40064-016-3761-5.

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                    Ferreira, Ivan S., Tello, Camilo, Bergano, Miguel, Villela, Thyrso, Barbosa, Domingos, & Smoot, George F. A C-band broadband ortho-mode transducer for radioastronomy polarimetry.  United States.  https://doi.org/10.1186/s40064-016-3761-5

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                    Ferreira, Ivan S., Tello, Camilo, Bergano, Miguel, Villela, Thyrso, Barbosa, Domingos, and Smoot, George F. Fri .  
"A C-band broadband ortho-mode transducer for radioastronomy polarimetry".  United States.  https://doi.org/10.1186/s40064-016-3761-5.  https://www.osti.gov/servlets/purl/1627041.

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@article{osti_1627041,

  title        = {A C-band broadband ortho-mode transducer for radioastronomy polarimetry},

  author       = {Ferreira, Ivan S. and Tello, Camilo and Bergano, Miguel and Villela, Thyrso and Barbosa, Domingos and Smoot, George F.},

  abstractNote = {Background: We describe the design, the construction and performance of a narrow band ortho-mode transducer, currently used in the 5 GHz polarimetric receiver of the Galactic Emission Mapping project. Results: The ortho-mode transducer was designed to achieve a high degree of transmission within the 400 MHz of the GEM band around the 5 GHz (4.8–5.2 GHz). It is composed of a circular-to-square waveguide transition, a septum polarizer, a thin waveguide coupler and a smooth square-to-rectangular waveguide transition with custom waveguide bends to the output ports. Conclusion: Our simulations and measurements show a very low level of cross-polarization of about -60 dB and a good impedance match for all three ports (S11; S22; S33 < -30 dB) with only 0:25 dB of insertion loss offset across the 400 MHz (4.8–5.2 GHz) of the reception bandwidth.},

  doi          = {10.1186/s40064-016-3761-5},

  journal      = {SpringerPlus},

  number       = 1,

  volume       = 5,

  place        = {United States},

  year         = {Fri Dec 02 00:00:00 EST 2016},

  month        = {Fri Dec 02 00:00:00 EST 2016}

}

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Works referenced in this record:

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journal, September 1991

Bøifot, Anton M.
European Transactions on Telecommunications, Vol. 2, Issue 5
DOI: 10.1002/ett.4460020507

The 2.3 GHz continuum survey of the GEM project
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Tello, C.; Villela, T.; Torres, S.
Astronomy & Astrophysics, Vol. 556
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Foregrounds and CMB experiments
journal, September 1999

Bouchet, François R.; Gispert, Richard
New Astronomy, Vol. 4, Issue 6
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C-Band All-Sky Survey: a first look at the Galaxy
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Irfan, M. O.; Dickinson, C.; Davies, R. D.
Monthly Notices of the Royal Astronomical Society, Vol. 448, Issue 4
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The GEM project: An international collaboration to survey galactic radiation emission
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Torres, S.; Cañon, V.; Casas, R.
Astrophysics and Space Science, Vol. 240, Issue 2
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The Polarized synchrotron with GEM
conference, April 2007

Barbosa, Domingos S.; Bergano, Jose M.; Fonseca, Rui
Proceedings of CMB and Physics of the Early Universe — PoS(CMB2006)
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Planck 2015 results : X. Diffuse component separation: Foreground maps
journal, September 2016

Adam, R.; Ade, P. A. R.; Aghanim, N.
Astronomy & Astrophysics, Vol. 594
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CAD and optimization of compact ortho-mode transducers
journal, January 1999

Ludovico, M.; Piovano, B.; Bertin, G.
IEEE Transactions on Microwave Theory and Techniques, Vol. 47, Issue 12
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ARCADE 2 MEASUREMENT OF THE ABSOLUTE SKY BRIGHTNESS AT 3-90 GHz
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Fixsen, D. J.; Kogut, A.; Levin, S.
The Astrophysical Journal, Vol. 734, Issue 1
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Compact broadband planar orthomode transducer
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Grimes, P. K.; King, O. G.; Yassin, G.
Electronics Letters, Vol. 43, Issue 21
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The C-Band All-Sky Survey: instrument design, status, and first-look data
conference, July 2010

King, Oliver G.; Copley, Charles; Davies, Rod
SPIE Astronomical Telescopes + Instrumentation, SPIE Proceedings
DOI: 10.1117/12.858011

The 2.3 GHz continuum survey of the GEM project
journal, July 2013

Tello, C.; Villela, T.; Torres, S.
Astronomy & Astrophysics, Vol. 556
DOI: 10.1051/0004-6361/20079306

Planck 2015 results : X. Diffuse component separation: Foreground maps
journal, September 2016

Adam, R.; Ade, P. A. R.; Aghanim, N.
Astronomy & Astrophysics, Vol. 594
DOI: 10.1051/0004-6361/201525967

C-Band All-Sky Survey: a first look at the Galaxy
journal, March 2015

Irfan, M. O.; Dickinson, C.; Davies, R. D.
Monthly Notices of the Royal Astronomical Society, Vol. 448, Issue 4
DOI: 10.1093/mnras/stv212

CAD and optimization of compact ortho-mode transducers
journal, January 1999

Ludovico, M.; Piovano, B.; Bertin, G.
IEEE Transactions on Microwave Theory and Techniques, Vol. 47, Issue 12
DOI: 10.1109/22.808996

Foregrounds and CMB Experiments: I. Semi-analytical estimates of contamination
text, January 1999

Bouchet, François R.; Gispert, Richard
arXiv
DOI: 10.48550/arxiv.astro-ph/9903176

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Title: A C-band broadband ortho-mode transducer for radioastronomy polarimetry

Abstract

Citation Formats

Classification of Ortho-mode transducers journal, September 1991

The 2.3 GHz continuum survey of the GEM project journal, July 2013

Foregrounds and CMB experiments journal, September 1999

C-Band All-Sky Survey: a first look at the Galaxy journal, March 2015

The GEM project: An international collaboration to survey galactic radiation emission journal, September 1996

The Polarized synchrotron with GEM conference, April 2007

Planck 2015 results : X. Diffuse component separation: Foreground maps journal, September 2016

CAD and optimization of compact ortho-mode transducers journal, January 1999

ARCADE 2 MEASUREMENT OF THE ABSOLUTE SKY BRIGHTNESS AT 3-90 GHz journal, May 2011

Compact broadband planar orthomode transducer journal, January 2007

The C-Band All-Sky Survey: instrument design, status, and first-look data conference, July 2010

The 2.3 GHz continuum survey of the GEM project journal, July 2013

Planck 2015 results : X. Diffuse component separation: Foreground maps journal, September 2016

C-Band All-Sky Survey: a first look at the Galaxy journal, March 2015

CAD and optimization of compact ortho-mode transducers journal, January 1999

Foregrounds and CMB Experiments: I. Semi-analytical estimates of contamination text, January 1999

Classification of Ortho-mode transducers
journal, September 1991

The 2.3 GHz continuum survey of the GEM project
journal, July 2013

Foregrounds and CMB experiments
journal, September 1999

C-Band All-Sky Survey: a first look at the Galaxy
journal, March 2015

The GEM project: An international collaboration to survey galactic radiation emission
journal, September 1996

The Polarized synchrotron with GEM
conference, April 2007

Planck 2015 results : X. Diffuse component separation: Foreground maps
journal, September 2016

CAD and optimization of compact ortho-mode transducers
journal, January 1999

ARCADE 2 MEASUREMENT OF THE ABSOLUTE SKY BRIGHTNESS AT 3-90 GHz
journal, May 2011

Compact broadband planar orthomode transducer
journal, January 2007

The C-Band All-Sky Survey: instrument design, status, and first-look data
conference, July 2010

The 2.3 GHz continuum survey of the GEM project
journal, July 2013

Planck 2015 results : X. Diffuse component separation: Foreground maps
journal, September 2016

C-Band All-Sky Survey: a first look at the Galaxy
journal, March 2015

CAD and optimization of compact ortho-mode transducers
journal, January 1999

Foregrounds and CMB Experiments: I. Semi-analytical estimates of contamination
text, January 1999