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Coherent scattering of a spherical wave from an irregular surfaceThe scattering of a spherical wave from a rough surface using the Kirchhoff approximation is considered. An expression representing the measured coherent scattering coefficient is derived. It is shown that the sphericity of the wavefront and the antenna pattern can become an important factor in the interpretation of ground-based measurements. The condition under which the coherent scattering-coefficient expression reduces to that corresponding to a plane wave incidence is given. The condition under which the result reduces to the standard image solution is also derived. In general, the consideration of antenna pattern and sphericity is unimportant unless the surface-height standard deviation is small, i.e., unless the coherent scattering component is significant. An application of the derived coherent backscattering coefficient together with the existing incoherent scattering coefficient to interpret measurements from concrete and asphalt surfaces is shown.
Document ID
19830042566
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fung, A. K.
(University of Kansas Center for Research, Inc., Lawrence KS, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1983
Publication Information
Publication: IEEE Transactions on Antennas and Propagation
Volume: AP-31
Subject Category
Instrumentation And Photography
Report/Patent Number
AD-A135765
Accession Number
83A23784
Funding Number(s)
CONTRACT_GRANT: NAG5-30
CONTRACT_GRANT: DAAG29-80-K-0018
Distribution Limits
Public
Copyright
Other

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