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Design of an Asymme...
Design of an Asymmetrical Quadruple-ridge Flared Horn Feed: a Solution to Eliminate Polarization Discrepancy in the Offset Reflecting Systems
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- Dong, Bin, 1984 (author)
- Chinese Academy of Sciences
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- Yang, Jian, 1960 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Pantaleev, Miroslav, 1970 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Flygare, Jonas, 1988 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Billade, Bhushan, 1982 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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(creator_code:org_t)
- 2018
- 2018
- English.
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In: IET Conference Publications. ; 2018:CP741
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Abstract
Subject headings
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- Quadruple-ridge Flared Horns (QRFHs) have been showing qualified performance as the feed antennas for the reflecting systems in the Square Kilometre Array (SKA). However, due to the offset optics of the SKA reflecting system, identical illuminations from dual polarizations of the feed would but result in different system performance. This difference would become more severe towards high frequencies and may cause the worse polarization unqualified for the desired specification. In this paper, an asymmetrical QRFH feed working over Band B (4.6–24 GHz) is proposed and optimized to tackle this problem.The asymmetrical Band-B feed is composed of two different and orthogonal pairs of both ridges and sidewall quad-pieces, so as to provide orthogonal polarizations but different illuminations. Simulated results show that, by this asymmetrical design different beamwidths and different combinations of sub-efficiencies can be provided for two polarizations, so as to eliminate the polarization discrepancy over most of the bandwidth. Benefitting from this elimination, both polarizations of the Band-B feed have now achieved the SKA specification in terms of aperture efficiency.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Keyword
- offset reflector antenna
- polarization discrepancy
- quadruple-ridge flared horn
Publication and Content Type
- kon (subject category)
- ref (subject category)
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