Corrections for the effects of a radome on antenna surfacemeasurements made by microwave holography
Rogers, A.E.E.
Barvainis, R.
Charpentier, P.J.
Corey, B.E.
Haystack Obs., MIT, Westford, MA;
This paper appears in: Antennas and Propagation, IEEE Transactions on
Publication Date: Jan 1993
Volume: 41,
Issue: 1
On page(s): 77-84
ISSN: 0018-926X
References Cited: 12
CODEN: IETPAK
INSPEC Accession Number: 4439242
Digital Object Identifier: 10.1109/8.210118
Current Version Published: 2002-08-06
Abstract
Measurements of the surface deviations of a parabolic antenna by
microwave holography have been corrected for the effects of an enclosing
radome. The largest correction, which is due to diffraction from the
metal space frame, is made by using a model computed from the radome
structure. This model accounts for the changing diffraction as the
antenna is scanned during the interferometric mapping of the complex
beam pattern. Correction for reflections from the radome panels is made
by simultaneously measuring the beam pattern at multiple frequencies to
provide delay discrimination to reject antenna sidelobes generated by
multiple reflections which arrive with delays different from that of the
main beam
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