Shielding effect of hollow chiral sphere

Author

Sihvola, Ari H. ; Ermutlu, Murat E.

Author_Institution

Electromagn. Lab., Helsinki Univ. of Technol., Espoo, Finland

Volume

39

Issue

3

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

219

Lastpage

224

Abstract

The low-frequency shielding effect of a spherical layer is studied. The layer is made of a chiral material and it is electromagnetically characterized with three material parameters: permittivity, permeability, and chirality. Due to chirality, there is magnetoelectric coupling. The electric and magnetic shielding effects are derived and are shown to be functions of the three material parameters and also the relative thickness of the layer. Illustrations display the effects of the various parameters on the shielding, which is different for the magnetic and electric fields. Among the special effects is that the shielding increases rapidly as the chirality parameter approaches the refractive index of the shell. This makes chiral shells in principle effective shields, and in the future they may offer an alternative to conducting materials for novel shielding applications

Keywords

chirality; electric fields; electromagnetic shielding; magnetic fields; magnetic permeability; permittivity; refractive index; LF shielding effect; chiral material; chirality parameter; conducting materials; electric fields; electric shielding effects; hollow chiral sphere; low frequency shielding effect; magnetic fields; magnetic shielding effects; magnetoelectric coupling; material parameters; permeability; permittivity; refractive index; shielding applications; spherical layer; thickness; Conducting materials; Dielectric materials; Frequency; Magnetic flux; Magnetic materials; Magnetic separation; Magnetic shielding; Optical materials; Permeability; Permittivity;

fLanguage

English

Journal_Title

Electromagnetic Compatibility, IEEE Transactions on

Publisher

ieee

ISSN

0018-9375

Type

jour

DOI

10.1109/15.618049

Filename

618049