Low-frequency scattering from two-dimensional perfect conductors

Author

Hansen, Thorkild B. ; Yaghjian, Arthur D.

Author_Institution

Rome Lab., Hanscom AFB, MA, USA

Volume

40

Issue

11

fYear

1992

fDate

11/1/1992 12:00:00 AM

Firstpage

1389

Lastpage

1402

Abstract

Exact expressions are obtained for the leading terms in the low-frequency expansions of the far field scattered by an arbitrarily shaped cylinder with finite cross section, an arbitrarily shaped cylindrical bump on a ground plane, and an arbitrarily shaped cylindrical dent in a ground plane. By inserting the low-frequency expansions of the incident plane wave and Green´s function into exact integral equations for the surface current, integral equations are obtained for the leading terms in the low-frequency expansions of the surface current. Simple integration of these leading terms of the current expansion yield the leading terms in the low-frequency expansions of the scattered fields. The general low-frequency expressions are confirmed by comparing them to low-frequency results obtained from exact time-harmonic eigenfunction solutions

Keywords

Green´s function methods; electromagnetic wave scattering; integral equations; Green´s function; arbitrarily shaped cylinder; cylindrical bump; cylindrical dent; electromagnetic scattering; far field; finite cross section; ground plane; incident plane wave; integral equations; low-frequency expansions; surface current; two-dimensional perfect conductors; Conductors; Eigenvalues and eigenfunctions; Electromagnetic scattering; Electrostatics; Integral equations; Polarization; Rayleigh scattering; Shape; Surface waves; Tellurium;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.202716

Filename

202716