Characteristic of the scattering field from a lossy medium coated conducting sphere

Author

Zhang Liyang ; Wang Wenbing

Author_Institution

Xi´´an Jiaotong Univ., China

fYear

1990

fDate

7-11 May 1990

Firstpage

1010

Abstract

The characteristics of the scattering field from a lossy medium coated perfectly conducting sphere are studied analytically. Singularities of the scattering field are only poles. There are no branch point contributions to transient electromagnetic scattering responses. The natural frequencies of the scatterer are numerically evaluated. It can be seen that the poles shift regularly under variations of conductivity of the coating medium sigma /sub 1/. Large sigma /sub 1/ introduces extra poles on the imaginary axis of the complex frequency plane. Branch points of square root epsilon do not give rise to extra poles.<>

Keywords

coatings; electromagnetic field theory; electromagnetic wave scattering; coated conducting sphere; coating medium; complex frequency plane; conductivity; lossy medium; natural frequencies; poles; scattering field; singularities; transient EM scattering responses; Coatings; Conductivity; Electromagnetic scattering; Electromagnetic transients; Equations; Frequency; Numerical analysis; Partial response channels; Tellurium; Transient response;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1990. AP-S. Merging Technologies for the 90's. Digest.

Conference_Location

Dallas, TX, USA

Type

conf

DOI

10.1109/APS.1990.115281

Filename

115281