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Projects Document 1152-v1

Geometrical Model of Illumination of Parabolic Cylinder

Document #:
Projects-doc-1152-v1
Document type:
Note
Submitted by:
David McGinnis
Updated by:
David McGinnis
Document Created:
12 Mar 2011, 10:53
Contents Revised:
12 Mar 2011, 10:53
Metadata Revised:
12 Mar 2011, 10:53
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Abstract:
For the case of an isotropic feed, a short section of cylinder can be modeled as a rectangular aperture. This is because the electromagnetic path length from the reflecting surface to the focal point is the same for all points on the cylinder surface and the feed pattern is isotropic. In the case in which the feed pattern is not isotropic (i.e. the feed dimensions are a significant fraction of a wavelength), the aperture equations can be modified to give an approximation of the cylinder beam pattern. These modifications can lend to an estimate of the fraction of the surface that is illuminated by the feed pattern.
Files in Document:
  • PDF File (ParabolicIllumination.pdf, 135.3 kB)
Topics:
Keywords:
Cylinder antenna
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