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A turnstile junction waveguide orthomode transducer

Navarrini A, Plambeck R...(+2 more)

IEEE Transactions on Microwave Theory and Techniques, vol. 54, issue 1 (2006) pp. 272-277

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Abstract

An orthomode transducer with a circular waveguide input and two rectangular waveguide outputs is described. The design utilizes a turnstile junction and two E-plane power combiners. A K-band version of this device has been constructed and tested. From 18 to 26 GHz, the input reflection coefficient was less than -19 dB, the cross-polarization was less than -48 dB, and the transmission loss was ~0.15 dB. We estimate the mechanical tolerances that would be required to scale this device to the 200-270-GHz band for use in a dual-polarization radio-astronomy receiver

Author-supplied keywords

  • Polarimetry
  • Power combiner
  • Radio astronomy
  • Turnstile junction
  • Waveguide transitions

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