We report on the design, fabrication and testing of a set of high performance corrugated feed horns at 30 GHz, 70 GHz and 100 GHz, built as advanced prototypes for the Low Frequency Instrument (LFI) of the ESA Planck mission. The electromagnetic designs include linear (100 GHz) and dual shaped (30 and 70 GHz) profiles. Fabrication has been achieved by direct machining at 30 GHz, and by electro-formation at higher frequencies. The measured performances on side lobes and return loss meet the stringent Planck requirements over the large (20%) instrument bandwidth. Moreover, the advantage in terms of main lobe shape and side lobes levels of the dual profiled designs has been demonstrated.
@article{arxiv.astro-ph/0307309,
title = {High Performances Corrugated Feed Horns for Space Applications at Millimetre Wavelengths},
author = {F. Villa and M. Sandri and N. Mandolesi and R. Nesti and M. Bersanelli and A. Simonetto and C. Sozzi and O. D'Arcangelo and V. Muzzini and A. Mennella and P. Guzzi and P. Radaelli and R. Fusi and E. Alippi},
journal= {arXiv preprint arXiv:astro-ph/0307309},
year = {2009}
}
Comments
16 pages, 7 figures, accepted for publication in Experimental Astronomy