Projects Document 1152-v1

Geometrical Model of Illumination of Parabolic Cylinder

Document #:
Document type:
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
Viewable by:
  • Public document
Modifiable by:

Quick Links:
Latest Version

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)
Cylinder antenna
DocDB Home ]  [ Search ] [ Last 20 Days ] [ List Authors ] [ List Events ] [ List Topics ]

Security, Privacy, Legal
Fermilab Policy on Computing
Fermi National Accelerator Laboratory

DocDB Version 8.8.9, contact Document Database Administrators