Corrections for the effects of a radome on antenna surface measurements made by microwave holography

Author

Rogers, Alan E E ; Barvainis, Richard ; Charpentier, P.J. ; Corey, Brian E.

Author_Institution

Haystack Obs., MIT, Westford, MA, USA

Volume

41

Issue

1

fYear

1993

fDate

1/1/1993 12:00:00 AM

Firstpage

77

Lastpage

84

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

Keywords

electromagnetic wave diffraction; electromagnetic wave reflection; microwave holography; reflector antennas; surface topography measurement; Haystack antenna; antenna sidelobes rejection; antenna surface measurements; complex beam pattern; delay discrimination; electromagnetic diffraction; electromagnetic reflection; interferometric mapping; metal space frame; microwave holography; parabolic antenna; radome effects; reflector antenna; surface deviations; Antenna measurements; Delay; Diffraction; Frequency measurement; Holography; Microwave antennas; Microwave measurements; Multifrequency antennas; Optical reflection; Reflector antennas;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.210118

Filename

210118