Accession Number : ADA138968

Title :   Scattering of an Electromagnetic Plane Wave from a Perfectly Electrically Conducting Half-Plane in the Proximity of Planar Media Discontinuities.

Descriptive Note : Final technical rept. 1 Jan 80-1 Jan 83,


Personal Author(s) : Coblin,R D ; Pearson,L W

PDF Url : ADA138968

Report Date : Feb 1983

Pagination or Media Count : 233

Abstract : The problem of scattering of electromagnetic waves from a perfectly electrically conducting (PEC) half-plane is a classical problem in the field of electromagnetics and is the basis of the GTD (geometrical theory of diffraction). The application of this theory to modern aerospace structures is hampered due to the presence of media discontinuities which alter the scattering behavior. Therefore, the study of diffraction in the presence of such discontinuities is an important prerequisite to applying the GTD to practical problems. Two related problems are considered in this study which involve planar media discontinuities. The first configuration concerns a planar interface between two semi-infinite, homogeneous media with a PEC half-plane covering half of the interface. The second configurations concerns a dielectric slab embedded in a contrasting medium. On the upper surface of the slab resides a PEC half-plane. Both structures are assumed to be excited by a transverse magnetic plane wave. The boundary value problems are structured as integral equations involving the electric field which is tangential to the interface.

Descriptors :   *Electromagnetic scattering, *Plane waves, *Interfaces, *Electromagnetic radiation, *Discontinuities, *Electrical conductivity, Electromagnetic fields, Diffraction, Fourier transformation, Aerospace craft, Boundary value problems, Dielectrics, Tangents, Integral equations, Electric fields, Magnetic fields, Geometry, Behavior, Media, Far field, Scattering, Configurations, Homogeneity, Theory, Planar structures, Transverse

Subject Categories : Electricity and Magnetism
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE