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Extension of Subreflector Increases Antenna EfficiencyAccording to calculations, efficiency of offset Cassegrain reflector antenna increased by about 8 percent by extending edge of subreflector outward about 1 wavelength beyond optical limit. Even though main reflector partially shadowed by subreflector, partial aperture blockage more than offset by consequent reduction of diffraction on subreflector. Similar conclusions apply to symmetric Cassegrain antennas.
Document ID
19870000515
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Rahmat-Samii, Y. (Caltech)
Date Acquired
August 13, 2013
Publication Date
November 1, 1987
Publication Information
Publication: NASA Tech Briefs
Volume: 11
Issue: 10
ISSN: 0145-319X
Subject Category
Electronic Components And Circuits
Report/Patent Number
NPO-16872
Report Number: NPO-16872
ISSN: 0145-319X
Accession Number
87B10515
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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