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Optimization of small reflector antennas for radio astronomy

Soliman, Ahmed and Weinreb, Sander (2016) Optimization of small reflector antennas for radio astronomy. In: 2016 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM). IEEE , Piscataway, NJ. ISBN 978-1-4673-8677-7. http://resolver.caltech.edu/CaltechAUTHORS:20160711-092645120

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Abstract

This paper reports simulated and analytical results for 3.8 m symmetric and offset reflector geometries using a wideband feed and concludes that a significant improvement in performance can be obtained using the offset geometry. These performance improvements are a reduction of spillover noise from 28K to 16 K, and an improvement in the sensitivity figure of merit (A_(eff)/T_(sys)) from 0.07 to 0.09 m^2/K. Further performance improvement in offset design were achieved using a ground shield, which reduced the spillover noise to 11 K, and adding a dielectric rod within the wideband feed, which illuminated the antenna to improve sensitivity figure of merit from 0.09 to 0.12m^2/K The use of a mesh material for the offset reflector surface was also investigated. Using these optimizations, arrays of small offset reflectors can be used in future radio astronomy.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1109/USNC-URSI-NRSM.2016.7436249 DOIArticle
http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7436249PublisherArticle
Additional Information:© 2016 IEEE. I would like to thank Clifton Quan, Stephen Smith, and Andrew Janzen for their valuable comments on this work.
Record Number:CaltechAUTHORS:20160711-092645120
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160711-092645120
Official Citation:A. Soliman and S. Weinreb, "Optimization of small reflector antennas for radio astronomy," 2016 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), Boulder, CO, 2016, pp. 1-2. doi: 10.1109/USNC-URSI-NRSM.2016.7436249
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:68949
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:25 Jul 2016 22:58
Last Modified:25 Jul 2016 22:58

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