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Bifocal dual reflector antennaA bifocal dual reflector antenna is similar to and has better scan capability than classical cassegrain reflector antenna. The method used in determining the reflector surfaces is a modification of a design method for the dielectric bifocal lens. The three dimensional dual reflector is obtained by first designing an exact (in geometrical optics sense) two-point corrected two dimensional reflector and then rotating it around its axis of symmetry. A point by point technique is used in computing the reflector surfaces. Computed radiation characteristics of the dual reflector are compared with those of a cassegrain reflector. The results confirm that the bifocal antenna has superior performance.
Document ID
19740002092
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Rao, B. L. J. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
September 1, 1973
Subject Category
Electronic Equipment
Report/Patent Number
NASA-TM-X-70490
X-750-73-263
Accession Number
74N10204
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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