Novel low-cost technique to manufacture submillimeter corrugated feedhorns

Details Novel low-cost technique to manufacture submillimeter corrugated feedhorns Novel low-cost technique to manufacture submillimeter corrugated feedhorns

Jul 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000spie.4015..500m&link_type=abstract

Proc. SPIE Vol. 4015, p. 500-514, Radio Telescopes, Harvey R. Butcher; Ed.

Physics

1

Scientific paper

Corrugated feedhorns are commonly used with reflector antennas, either for emission or reception purposes, because of their very low side lobe beam patterns, their very good E-H plane symmetry and their important bandwidth. Unfortunately, the electroforming technique that is generally used to fabricate them requires the machining of single-use mandrel. Direct milling of the horn is also possible, either in a single block or in a split block, but this also requires to machine each desired horn. At submillimeter frequencies, machining of small corrugations in a mandrel or in a block is costly. We present in this paper a cost-effective technique to fabricate helicoidal corrugated feed horns, which consists in machining one reusable mandrel and to mold as many horns as needed.

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