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Modal, ray, and beam techniques for analyzing the EM scattering by open-ended waveguide cavitiesThe problem of high-frequency electromagnetic (EM) scattering by open-ended waveguide cavities with an interior termination is analyzed via three different approaches. When cavities can be adequately modeled by joining together piecewise separable waveguide sections, a hybrid combination of asymptotic high-frequency and modal techniques is employed. In the case of more arbitrarily shaped waveguide cavities for which modes cannot even be defined in the conventional sense, the geometrical optics ray approach proves to be highly useful. However, at sufficiently high frequencies, both of these approaches tend to become inefficient. Hence, a paraxial Gaussian batch technique, which retains much of the simplicity of the ray approximation but is potentially more efficient, is investigated. Typical numerical results based on the different approaches are discussed.
Document ID
19890052223
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Pathak, Prabhakar H.
(Ohio State Univ. Columbus, OH, United States)
Burkholder, Robert J.
(Ohio State University Columbus, United States)
Date Acquired
August 14, 2013
Publication Date
May 1, 1989
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: 37
ISSN: 0018-926X
Subject Category
Communications And Radar
Accession Number
89A39594
Funding Number(s)
CONTRACT_GRANT: F33615-84-K-1550
CONTRACT_GRANT: NAG3-476
CONTRACT_GRANT: N60530-85-C-0249
CONTRACT_GRANT: N00014-88-K-0004
Distribution Limits
Public
Copyright
Other

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