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Diffraction and reflection of a plane electromagnetic wave in a right-angle corner with impedance walls

Osipov, Andrey and Senior, Thomas (2008) Diffraction and reflection of a plane electromagnetic wave in a right-angle corner with impedance walls. In: Proceedings of the 29th General Assembly of International Union of Radio Science (URSI). XXIXth URSI General Assembly, 2008-08-09 - 2008-08-16, Chicago, Illinois (USA).

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Abstract

We study the behavior of an electromagnetic field in a right-angle interior wedge-shaped region with impedance faces. This geometry is a useful model for a variety of applications in radar and wireless communication technologies. An exact solution of the general problem for an arbitrary-angle wedge with tensor impedance boundary conditions excited by an incident plane electromagnetic wave is specialized to the case of a 90° wedge with diagonal tensor impedances. We present explicit expressions for the geometrical optics portion of the field and show that they are continuous inside the region only if a compatibility condition on the face impedances is met. In general the geometrical optics fields are discontinuous at the direction of incidence and the edge-diffracted field gets excited in the region to make the total field continuous. Numerical results illustrate the edge-diffracted field as a function of observation angle for several impedance combinations, showing the overall increase as the impedance compatibility condition is increasingly not met.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Diffraction and reflection of a plane electromagnetic wave in a right-angle corner with impedance walls
Authors:
AuthorsInstitution or Email of Authors
Osipov, AndreyUNSPECIFIED
Senior, ThomasEECS Department, University of Michigan, Ann Arbor, USA
Date:13 August 2008
Journal or Publication Title:Proceedings of the 29th General Assembly of International Union of Radio Science (URSI)
Status:Published
Keywords:anisotropic surfaces, diffraction coefficient, dihedral corner reflector, GTD/ UTD, wedge
Event Title:XXIXth URSI General Assembly
Event Location:Chicago, Illinois (USA)
Event Type:international Conference
Event Dates:2008-08-09 - 2008-08-16
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Military Technologies
Location: Oberpfaffenhofen
Institutes and Institutions:Microwaves and Radar Institute > Reconnaissance and Security
Deposited By: Dr. Andrey Osipov
Deposited On:25 Aug 2008
Last Modified:12 Dec 2013 20:32

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