Diffraction by a wedge with variable-impedance faces

Author

Pelosi, Giuseppe ; Manara, Giuliano ; Nepa, Paolo

Author_Institution

Dept. of Electr. Eng., Florence Univ., Italy

Volume

44

Issue

10

fYear

1996

fDate

10/1/1996 12:00:00 AM

Firstpage

1334

Lastpage

1340

Abstract

The scattering from a wedge with nonuniform impedance faces illuminated by a plane wave, perpendicularly incident on its edge, is analyzed. The solution technique is in the framework of perturbative methods; it applies to surface impedances of the wedge faces having the form of a constant plus a small amplitude perturbation which exhibits an exponential dependence on the distance from the edge in a plane transverse to the edge. This is of remarkable importance for applications as it allows the modeling of the actual behavior of the equivalent surface impedance in the special case of wedges coated with dielectric slabs. Uniform asymptotic expressions for the fields are obtained in the context of the uniform geometrical theory of diffraction (UTD)

Keywords

dielectric materials; electric impedance; electromagnetic wave scattering; geometrical theory of diffraction; perturbation techniques; EM fields; UTD; dielectric slab coating; equivalent surface impedance; exponential dependence; perturbative methods; scattering; small amplitude perturbation; uniform asymptotic expressions; uniform geometrical theory of diffraction; variable-impedance faces; wedge; Boundary conditions; Context modeling; Dielectrics; Diffraction; Equations; Laboratories; Performance evaluation; Scattering; Slabs; Surface impedance;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.537327

Filename

537327