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Backscattering from Electrically Large Low-Absorption Spheres

Osipov, Andrey (2016) Backscattering from Electrically Large Low-Absorption Spheres. EMTS 2016, 2016-08-14 - 2016-08-18, Espoo, Finland. doi: 10.1109/URSI-EMTS.2016.7571316.

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Backscattering from electrically large low-absorption spheres cannot be fully explained in the framework of geometrical optics. This paper studies the role of the so-called horizontal branch of poles of the spectra and shows that the residues at these poles can be interpreted as creeping waves propagating on the concave side of the spherical boundary. In contrast to the well-known creeping waves propagating on the convex side of the spherical boundary, which are associated with the vertical branch of poles and rapidly decay with growing electrical size of the sphere, these new waves are much weaker attenuated and may dominate backscattering from electrically large low-absorption spheres. Analytical formulas for the contributions from the poles of the horizontal branch are obtained, and their relation to the irregular pattern (ripple) in scattering cross sections of electrically large low-absorption spheres is suggested.

Item URL in elib:https://elib.dlr.de/104470/
Document Type:Conference or Workshop Item (Speech)
Title:Backscattering from Electrically Large Low-Absorption Spheres
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Osipov, AndreyUNSPECIFIEDhttps://orcid.org/0000-0001-8678-9652
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1109/URSI-EMTS.2016.7571316
Page Range:pp. 76-79
Keywords:electrically large low-absorption sphere, irregular backscattering pattern, radar cross section, calibration target
Event Title:EMTS 2016
Event Location:Espoo, Finland
Event Type:international Conference
Event Dates:2016-08-14 - 2016-08-18
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Reconnaissance and Security
Deposited By: Osipov, Dr. Andrey
Deposited On:01 Jun 2016 09:34
Last Modified:16 Jan 2017 18:31

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