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Beyond-Decade Ultra...
Beyond-Decade Ultrawideband Quad-Ridge Flared Horn With Dielectric Load From 1 to 20 GHz
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- Flygare, Jonas, 1988 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Yang, Jian, 1960 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Pollak, Alexander W. (author)
- SETI Institute
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- Watkins, Robert E. J. (author)
- University Of Oxford
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Hillier, Fiona (author)
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- Helldner, Leif, 1969 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Ferm, Sven-Erik, 1961 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: IEEE Transactions on Antennas and Propagation. - 0018-926X .- 1558-2221. ; 71:3, s. 2110-2125
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Abstract
Subject headings
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- In this article, we present a novel dielectrically loaded quad-ridge flared horn (QRFH) as a reflector feed with beyond-decade ultrawideband performance. The dielectric is machined in a low-loss, space-grade polyimide specified with low outgassing for a vacuum environment. The feed covers 1–20 GHz bandwidth with a measured band-average input reflection of −13.6 and 41.5 dB isolation between two orthogonal polarized ports. Predicted performance in a paraboloidal reflector with a 60° half-subtended angle is 62% aperture efficiency average over the band. The ridges of the horn are designed with analytic-spline-hybrid 3-D profiles with thickness flaring outwards toward the feed aperture, improving low-frequency polarization properties. The QRFH was manufactured in four quarters for accurate ridge-to-ridge alignment and a reduced number of interfaces for good thermal properties in cryogenic applications. A prototype feed has been installed and tested with promising results in one of the 6 m offset Gregorian reflectors of the Allen Telescope Array (ATA) located at the Hat Creek Observatory, Hat Creek, CA, USA.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- Dielectric materials
- ultrawideband (UWB) antennas
- quad-ridge flared horn (QRFH)
- radio astronomy
- reflector feed
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Flygare, Jonas, ...
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Yang, Jian, 1960
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Pollak, Alexande ...
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Watkins, Robert ...
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Hillier, Fiona
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Helldner, Leif, ...
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show more...
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Ferm, Sven-Erik, ...
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show less...
- About the subject
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Electrical Engin ...
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IEEE Transaction ...
- By the university
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Chalmers University of Technology