Test of a waveguide orthomode transducer for the 385-500 GHz band

Alessandro Navarrini, Christopher Groppi, Robert Lin, Goutam Chattopadhyay

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

4 Scopus citations

Abstract

We report on the construction and test results of a waveguide Orthomode Transducer (OMT) for the 385-500 GHz band. The OMT is based on a symmetric reversecoupling structure and consists of two copper alloy blocks in split-block configuration fabricated using numerically controlled (CNC) milling machining. Test results of a first prototype OMT employing standard UG387 flanges at all ports were described at the previous ISSTT Symposium. Here, we report on experimental results of a second OMT version utilizing custom made mini-flanges and much shorter input and output waveguides. This second OMT version is tolerant to misalignment errors of the block halves, has improved performance over the first prototype, and covers a wider band than initially specified. From 325 to 500 GHz the measured input reflection coefficient of the second prototype OMT was less than -10 dB, the transmission was ≈-1 dB, and the isolation was less than -30 dB at room temperature for both polarization channels.

Original languageEnglish (US)
Title of host publication22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011
PublisherInternational Symposium on Space Terahertz Technology
Pages99-102
Number of pages4
StatePublished - 2011
Event22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011 - Tucson, AZ, United States
Duration: Apr 25 2011Apr 28 2011

Other

Other22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011
Country/TerritoryUnited States
CityTucson, AZ
Period4/25/114/28/11

Keywords

  • Orthomode transducer
  • Polarization splitter
  • Reverse coupling structure
  • Waveguide components

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Space and Planetary Science
  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Radiation

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