Compact Efficient Feed-Horn at 30-38 GHz for a Multi-beam Radio Telescope

Details Compact Efficient Feed-Horn at 30-38 GHz for a Multi-beam Radio Telescope Compact Efficient Feed-Horn at 30-38 GHz for a Multi-beam Radio Telescope

Jul 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jimtw..31..840c&link_type=abstract

Journal of Infrared, Millimeter, and Terahertz Waves, Volume 31, Issue 7, pp.840-851

Physics

Smooth-Walled Spline-Profile Horn, Ratan-600, Multi-Beam Receiving Array, Corrugated Horn

Scientific paper

The requirements for a feed suitable for a radio telescope multi-beam focal plane array are considered. A smooth-walled spline-profile horn covering the 30-38 GHz frequency band to be used in a multi-beam receiving array of a radio telescope has been optimized, manufactured and tested. The achieved cross-section aperture size of the horn allows us to provide a neighboring beam spacing equal or less than 2HPBW for the RATAN-600 radio telescope. The measured sidelobe levels of the radiation pattern is less than -30dB/-24dB/-26dB in H/E/450-planes, cross-polarization levels better than -20 dB, an input return loss better than -18 dB and the -3dB/-10dB-beamwidths are of the order of 40º/ 80º over the frequency band. Mutual-coupling of adjacent horns is less than -38 dB.

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