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Analysis of the Offset QUASAT Antenna

Published online by Cambridge University Press:  03 August 2017

M. Catarzi  and
G. Tofani
M. Catarzi
Affiliation:
Osservatorio Astrofisico di Arcetri, L. E. Fermi 5, 50125 Florence Italy
G. Tofani
Affiliation:
Osservatorio Astrofisico di Arcetri, L. E. Fermi 5, 50125 Florence Italy

Abstract

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In the ESA phase A of the Quasat project the use of a 10 m offset antenna, has been suggested (1). In the present work the use of the multifrequency coaxial feed, developed by ESA for the symmetric configuration, is analyzed with a multireflector configuration. The coaxial feed has the advantage of a more compact configuration. However reduced efficiency and higher cross polarization are expected at the lower frequency, due to the scattering on the subreflector surfaces.

Type
Instrumentation and Analysis
Information
Symposium - International Astronomical Union , Volume 129: The Impact of VLBI on Astrophysics and Geophysics , 1988 , pp. 447 - 448
Copyright
Copyright © Reidel 1988 

References

(1) QUASAT: A space VLBI satellite. Update report, 1987, ESA Sci (86), 8.Google Scholar
(2) Rudge, A.W.: Offset parabolic reflector antennas in Satellite communication antenna technology, Ed. Mittra, R., Imbriale, W.A., Maanders, E.J., 1987, North Holland.Google Scholar
(3) Cha, A.G.: Physical optics analysis of NASA/JPL DSN antennas, 1984 JPL Techn. Rep. D-1853.Google Scholar
(4) Galindo Israel, V., Mittra, R., Cha, A.G.: Aperture amplitude and phase control of offset and reflectors, 1979, IEEE Trans. AP 27, 154.CrossRefGoogle Scholar
(5) Cha, A.G., Bathker, D.A., Williams, W.F.: Advanced design concepts in ground station antennas, 1981, in Proc. 9th European Microwave Conference, Brighton, England, 147.Google Scholar