A Simple Orthomode Transducer for Centimeter to Submillimeter Wavelengths

Details A Simple Orthomode Transducer for Centimeter to Submillimeter Wavelengths A Simple Orthomode Transducer for Centimeter to Submillimeter Wavelengths

Apr 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009stt..conf..191d&link_type=abstract

Proceedings of the 20th International Symposium on Space Terahertz Technology, held April 20-22, 2009, in Charlottesville, VA, U

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We describe a simple orthomode transducer suitable for operation from centimeter to submillimeter wavelengths with appropriate scaling. It is fabricated as a split-block assembly with all waveguides in the same plane, and requires no septum or polarizing wires. The OMT operates over a 1.3:1 frequency band, narrower than a full waveguide band (typically 1.5:1). For a WR-10 version of the OMT, covering 78-102 GHz, the polarization isolation is > 37 dB and the return loss at the rectangular waveguide ports > 24 dB. The practical upper frequency for this design is probably limited by the precision of alignment that can be achieved between the block halves, which affects the polarization isolation.

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