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Planar orthomode transducers for feedhorn-coupled TES polarimeters

  • J. McMahon
  • , J. W. Appel
  • , J. E. Austermann
  • , J. A. Beall
  • , D. Becker
  • , B. A. Benson
  • , L. E. Bleem
  • , J. Britton
  • , C. L. Chang
  • , J. E. Carlstrom
  • , H. M. Cho
  • , A. T. Crites
  • , T. Essinger-Hileman
  • , W. Everett
  • , N. W. Halverson
  • , J. W. Henning
  • , G. C. Hilton
  • , K. D. Irwin
  • , J. Mehl
  • , S. S. Meyer
  • S. Mossley, M. D. Niemack, L. P. Parker, S. M. Simon, S. T. Staggs, C. Visnjic, E. Wollack, K. U-Yen, K. W. Yoon, Y. Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present simulations and discuss measurements of a planar orthomode transducer (OMT) being developed for use with bolometric detectors in observations of the polarization of the cosmic microwave background (CMB). This OMT couples radiation from a circular waveguide onto microstrip where it is filtered and then detected. A corrugated feed horn defines the optical beam. Simulations suggest this OMT achieves a coupling efficiency of greater than 96% with crosspolarization below 1% over 30% bandwidth.

Original languageEnglish (US)
Title of host publicationLow Temperature Detectors LTD-13 - Proceedings of the 13th International Workshop
Pages490-493
Number of pages4
DOIs
StatePublished - 2009
Event13th International Workshop on Low Temperature Detectors, LTD-13 - Stanford, CA, United States
Duration: Jul 20 2009Jul 24 2009

Publication series

NameAIP Conference Proceedings
Volume1185
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other13th International Workshop on Low Temperature Detectors, LTD-13
Country/TerritoryUnited States
CityStanford, CA
Period7/20/097/24/09

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

Keywords

  • Cosmic microwave background
  • Polarimetry
  • TES bolometers

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