Online citations, reference lists, and bibliographies.
← Back to Search

Astigmatism In Reflector Antennas: Measurement And Correction

A. Greve, B. Lefloch, D. Morris, H. Hein, S. Navarro
Published 1994 · Physics

Save to my Library
Download PDF
Analyze on Scholarcy Visualize in Litmaps
Reduce the time it takes to create your bibliography by a factor of 10 by using the world’s favourite reference manager
Time to take this seriously.
Get Citationsy
Investigates astigmatism is Cassegrain antennas from cross scans through in-and-out-of-focus diffraction images of extended radio sources. The use of extended sources is of interest for large (mm-wavelength) telescopes where the bright planets subtend a substantial fraction of the beam. The experimental and theoretical results presented refer to the IRAM 30-m telescope and measurements at 7.3 mm-1.3 mm wavelength; however, extrapolation to other telescopes is evident. The authors report on an experiment to correct the astigmatism (phase) at a position close to the focal plane of the telescope, i.e. the flat surface of the corotating Nasmyth mirror. >
This paper references
Antenna tolerance theory—A review
J. Ruze (1966)
Design of large steerable antennas
S. Hoerner (1967)
Focus broadening by astigmatism of large microwave parabolic antennas.
G. Feix (1969)
Astigmatism in reflector antennas
J. R. Cogdell (1973)
Reflector surface error compensation in cassegrain antennas
P. R. Cowles (1975)
Gravitational deformation and astigmatism of tiltable radio telescopes
S. Hoerner (1975)
Axial astigmatic fields in the focal region
J. Ruze (1975)
The design of correcting secondary reflectors
S. Hoerner (1976)
Measuring the gravitational astigmatism of a radio telescope
S. V. Hoerner (1978)
Wave scattering from error-compensating secondary reflectors
R. Langley (1979)
Improved efficiency with a mechanically deformable subreflector
S. Hoerner (1979)
Strehl number degradation by large-scale systematic surface deviations.
A. Greve (1980)
The IRAM 30-m millimeter radio telescope on Pico Veleta, Spain
J. Baars (1987)
Observations of anomalous refraction at radio wavelengths
W. Altenhoff (1987)
Radio-holographic reflector measurement of the 30-m millimeter radio telescope at 22 GHz with a cosmic signal source
D. Morris (1988)
Radio astronomy techniques
D. Downes (1989)
Radio astronomy - Towards the 21st century
R. Booth (1991)
Texas 5-m antenna aperture efficiency doubled from 230-300 GHz with error compensating secondary
C. Mayer (1991)
Thermal behavior of millimeter wavelength radio telescopes
A. Greve (1992)
A deformable subreflector for the Haystack radio telescope
J. Antebi (1994)

This paper is referenced by
Semantic Scholar Logo Some data provided by SemanticScholar