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Scattering from thin dielectric disksA solution was obtained for scattering from thin dielectric disks by approximating the currents induced inside the disk with the currents which would exist inside a dielectric slab of the same thickness, orientation and dielectic properties. This approximation reduces to an electrostatic approximation when the disk thickness, T, is small compared to the wavelength of the incident radiation and the approximation yields a conventional physical optics solution when the dimension, A, characteristic of the geometrical cross section of the disk (e.g., the diameter of a circular disk) is large compared to wavelength. When the ratio A/T sufficiently large the disk will always be in one or the other of these regimes, T lambda or kA1. Consequently, when A/T is large this solution provides a conventional approximation for the scattered fields which can be applied at all frequencies. As a check on this conclusion, a comparison was made between the theoretical and measured radar cross section of thin dielectric disks. Agreement was found for thin disks with both large and small values of kA.
Document ID
19860036552
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Le Vine, D. M.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Schneider, A.
(CyberCom Corp. Arlington, VA, United States)
Lang, R. H.
(George Washington University Washington, DC, United States)
Carter, H. G.
(General Dynamics Microwave Materials Laboratory Fort Worth, TX, United States)
Date Acquired
August 12, 2013
Publication Date
December 1, 1985
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: AP-33
ISSN: 0018-926X
Subject Category
Communications And Radar
Accession Number
86A21290
Distribution Limits
Public
Copyright
Other

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