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Effects of a fin edge close to a point caustic of a Gregorian antenna

  • Author(s): Capolino, F
  • Bussotti, P
  • Borselli, L
  • Albani, M
  • Maci, S
  • et al.
Abstract

The problem of edge diffraction close to a point caustic is analyzed in a typical dual-reflector Gregorian antenna in offset configuration. The diffraction phenomenon is produced by a perfectly conducting fin located between the feeder and the main reflector. This fin is sometimes used to reduce the coupling between the primary feed and the main reflector. For the sake of simplicity, the two-dimensional case is studied here, but the present technique can also be applied to practical three-dimensional configurations. © 1997 John Wiley & Sons, Inc.

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