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Microwave Holographic Surface Measurement of the Tidbinbilla 64-m Antenna

Published online by Cambridge University Press:  25 April 2016

Y. Rahmat-Samii ,
S. Gulkis ,
G.S. Levy ,
B.L Seidel ,
L.E. Young ,
Michael J. Batty  and
David L. Jauncey
Y. Rahmat-Samii
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
S. Gulkis
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
G.S. Levy
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
B.L Seidel
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
L.E. Young
Affiliation:
Jet Propulsion Laboratory, Pasadena, California
Michael J. Batty
Affiliation:
Division of Radiophysics, CSIRO, Sydney
David L. Jauncey
Affiliation:
Division of Radiophysics, CSIRO, Sydney
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Extract

The ‘holographic’ technique for accurately measuring the surface figure of large reflector antennas, described by Bennet et al, (1976) and Scott and Ryle (1977), has many advantages over older conventional survey methods. These include high speed, low cost, and the absence of any need for additional complex mechanical or optical survey devices. In essence, the technique consists of measuring the complex far-field response of the antenna at a single frequency using a terrestrial, satellite-borne or celestial radiation source of small angular diameter. This two-dimensional pattern is then Fourier-transformed to yield the complex illumination function across the antenna aperture. Antenna surface deviations are manifested as phase fluctuations in this function. In practice, a second antenna is needed to provide a phase reference.

Type
Contributions
Information
Publications of the Astronomical Society of Australia , Volume 5 , Issue 2 , 1983 , pp. 270 - 272
Copyright
Copyright © Astronomical Society of Australia 1983

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References

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