PTD analysis of impedance structures

Author

Syed, Hasnain H. ; Volakis, John L.

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA

Volume

44

Issue

7

fYear

1996

fDate

7/1/1996 12:00:00 AM

Firstpage

983

Lastpage

988

Abstract

Based on an approximate dyadic diffraction coefficient, equivalent currents (ECs) are derived for computing the scattering by a finite-length impedance wedge of arbitrary angle. The derived equivalent currents are implemented in a standard general purpose physical theory of diffraction (PTD) code and results are presented demonstrating the accuracy of the formulation for a number of impedance and (dielectrically) coated structures. These include typical shapes such as plates, finite-length cones, and cylinders which have been partially or fully coated. The PTD implementation requires a dyadic physical optics diffraction coefficient which is presented in the appendix

Keywords

approximation theory; dielectric properties; electric current; electric impedance; electromagnetic wave scattering; physical theory of diffraction; PTD analysis; accuracy; approximate dyadic diffraction coefficient; arbitrary angle; cylinders; dielectrically coated structures; dyadic physical optics diffraction coefficient; equivalent currents; finite length impedance wedge; finite-length cones; fully coated shapes; general purpose PTD code; impedance coated structures; impedance structures; partially coated shapes; physical theory of diffraction; plates; scattering; Code standards; Context; Dielectrics; Impedance; Optical diffraction; Optical scattering; Optical surface waves; Physical optics; Physical theory of diffraction; Shape;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.504305

Filename

504305