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GTD Analysis of Near-Field and Far-Field Patterns of a Parabolic Subreflector Illuminated by a Plane Wave
M. S. Narasimhan
Published in
Volume: 29
Issue: 4
Pages: 654 - 660
A geometrical theory of diffraction (GTD) analysis of the principal plane far-field and near-field patterns of a near-field Cassegrainian subreflector is presented. The uniform geometrical theory of diffraction (UGTD) [I] that drastically reduces the computation time has been utilized to analyze the subreflector in the form of a paraboloid illuminated by a plane wave. The numerical computations of the far-field amplitude and phase patterns of a typical paraboloidal subreflector based on the above technique correlate well with the results obtained by physical optics current integration, justifying the validity of the analysis presented. The GTD near-field analysis presented here is an improvement over that published earlier [2] and removes some of its limitations. Copyright © 1981 by The Institute of Electrical and Electronics Engineers, Inc.
About the journal
JournalIEEE Transactions on Antennas and Propagation
Open AccessNo
Concepts (3)
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    Electromagnetic field measurement