Low-frequency image theory for the dielectric sphere

Autor:	Johan C.-E. Sten, Ismo V. Lindell, R. E. Kleinman
Rok vydání:	1994
Předmět:	Field (physics) Mathematical analysis General Physics and Astronomy Radial line Current source Simple harmonic motion Electronic Optical and Magnetic Materials Transverse plane Dipole Classical mechanics Electric field Electrical and Electronic Engineering Current (fluid) Mathematics
Zdroj:	Journal of Electromagnetic Waves and Applications. 8:295-313
ISSN:	1569-3937 0920-5071
DOI:	10.1163/156939394x00885
Popis:	Kelvin's well-known and Neumann's lesser known image theories for the sphere, valid for static sources outside the sphere, are extended to low-frequency current sources involving a nondispersive dielectric, by expressing known field integrals as arising from suitable image currents. The image of a radial current element is seen to consist of a radial line current between the center of the sphere and the Kelvin point plus a dipole at the Kelvin point. The image of a transverse current element is a combination of a transverse current strip plus a radial bifilar line current between the center and the Kelvin point. These image currents can be interpreted as image charges of the corresponding static problem in harmonic motion. The theory is tested by known limiting cases.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e5771d4d4aae2d94a6b58b2a19bef183 https://doi.org/10.1163/156939394x00885 Zobrazit plný text záznamu