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Measured performance of a 230 GHz prototype focal-plane feedhorn array made by direct drilling of smooth-walled horns

Leech, J. and Tan, B. K. and Yassin, G. and Kittara, P. and Jiralucksanawong, A. and Wangsuya, S. (2010) Measured performance of a 230 GHz prototype focal-plane feedhorn array made by direct drilling of smooth-walled horns. In: 21st International Symposium on Space Terahertz Technology, March 23-25, 2010, Oxford, England.

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We present the first, complete 230 GHz feedhorn array manufactured by direct drilling of smooth–walled horns into a single plate of aluminium. The horn design process, based on a genetic algorithm, is described and the fabrication process, via direct drilling using shaped drill bits, is presented. We present cross coupling and beam pattern measurements of a close–packed pair of the smooth–walled horns fabricated in a single block of aluminium. We also present a prototype 37 horn array, again fabricated by drilling into a single block. Our measurements show that our designs and fabrication techniques will be robust when applied to large focal arrays of horns consisting of hundreds or thousands of feedhorns. We expect our smooth–walled horn designs and novel manufacturing techniques will offer an attractive, low-cost alternate to traditional horn arrays consisting of electroformed corrugated horns.

Item Type:Conference or Workshop Item (Paper)
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Additional Information:© 2010 Associated Universities, Inc. The construction and testing of the horn array prototypes, and horn software development work was supported using an STFC follow-on-find grant for the production of pre-commercialisation prototypes. The authors would like to thank Manju Henry, Jeunne Treuttel, Peter Huggard, Bertrand Thomans and Matthew Oldfield for their assistance in setting up and using the ABmm vector network analyser and 230 GHz antenna test range at the Rutherford Appleton Laboratories.
Group:Keck Institute for Space Studies
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Science and Technology Facilities Council (STFC)UNSPECIFIED
Record Number:CaltechAUTHORS:20160302-163125706
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:64973
Deposited By: Colette Connor
Deposited On:05 Mar 2016 19:09
Last Modified:03 Oct 2019 09:42

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