A turnstile junction waveguide orthomode transducer
IEEE Transactions on Microwave Theory And Techniques (2006)
- ISSN: 00189480
- DOI: 10.1109/TMTT.2005.860505
Available from adsabs.harvard.edu
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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
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