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Higher order diffractions from a circular diskThe backscattering from a circular disk is analyzed using the geometrical theory of diffraction. First-, second-, and third-order diffractions are included in the hard polarization analysis, while first-, second-, and third-order slope diffractions are included for soft polarization. Improvements in the prediction of the monostatic radar cross section over previous works are noted. For hard polarization, an excellent agreement is exhibited between experimental and theoretical results, while a very good agreement is noted for soft polarization. To further improve the soft polarization results for wide angles, a model for the creeping wave or circulating current on the edge of the disk is obtained and used to find an additional component of the backscattered field. The addition of this component significantly improves the results for wide angles, leading to excellent agreement for soft polarization also. An axial-caustic correction method using equivalent currents is also included in the analysis.
Document ID
19880041412
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Marsland, Diane P.
(SRI International Menlo Park, CA, United States)
Balanis, Constantine A.
(Arizona State University Tempe, United States)
Brumley, Stephen A.
(Motorola, Inc. Government Electronics Group, Scottsdale, AZ, United States)
Date Acquired
August 13, 2013
Publication Date
December 1, 1987
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: AP-35
ISSN: 0018-926X
Subject Category
Communications And Radar
Accession Number
88A28639
Funding Number(s)
CONTRACT_GRANT: NAG1-562
Distribution Limits
Public
Copyright
Other

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