Scattering by a right-angled lossy dielectric wedge

Author

Demetrescu, C. ; Constantinou, C.C. ; Mehler, M.J.

Author_Institution

Sch. of Electron. & Electr. Eng., Birmingham Univ., UK

Volume

144

Issue

5

fYear

1997

fDate

10/1/1997 12:00:00 AM

Firstpage

392

Lastpage

396

Abstract

Electromagnetic scattering by a right-angled lossy dielectric wedge at normal incidence is considered in detail. The lossy dielectric material of the wedge is simulated using second-order impedance boundary conditions on its faces. The Maliuzhinets (1958) method is employed to obtain the total exterior field. A high-frequency asymptotic approximation of the Sommerfeld integral is carried out to obtain a UTD expression for the total field. The predictions are validated against experimental measurements taken in a controlled laboratory environment. A comparison with the widely used heuristic UTD diffraction coefficient of Luebbers (1984) is presented and the validity of the latter coefficient is discussed

Keywords

approximation theory; dielectric materials; electric impedance; electromagnetic fields; electromagnetic wave scattering; geometrical theory of diffraction; integral equations; Maliuzhinets method; Sommerfeld integral; controlled laboratory environment; electromagnetic scattering; experimental measurements; heuristic UTD diffraction coefficient; high-frequency asymptotic approximation; lossy dielectric material; normal incidence; right-angled lossy dielectric wedge; second-order impedance boundary conditions; total exterior field;

fLanguage

English

Journal_Title

Microwaves, Antennas and Propagation, IEE Proceedings

Publisher

iet

ISSN

1350-2417

Type

jour

DOI

10.1049/ip-map:19971298

Filename

667519