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Telecommunications and Radio Engineering
SJR: 0.202 SNIP: 0.2 CiteScore™: 0.23

ISSN Imprimer: 0040-2508
ISSN En ligne: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v73.i16.20
pages 1417-1431

FOCUSING OF ELECTROMAGNETIC FIELD OF THE ELEMENTARY ELECTRICAL DIPOLE BY THE INTERFACE BETWEEN ORDINARY AND LEFT-HANDED MEDIA

V. K. Ivanov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
A. O. Silin
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
A. M. Stadnyk
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine

RÉSUMÉ

The problem of focusing of wave fields of different physical nature and frequency hands is relevant both for scientific experiments and practical applications in industry, health care and technology. However, the unique opportunities for the development of devices focusing electromagnetic fields, which are associated with the emergence of metamaterials (left-handed media), can not be fully realized in the framework of the ray-optical approach used in most studies, the main advantage of which is the visibility. Since this approach does not allow an evaluation of the influence of losses, location, orientation and type of the source on the structure of the radiated field, there is a need for a electrodynamic solution to model problems. The problem of radiation from elementary electric dipole located horizontally above the plane interface between passive normal and left media is rigorous solved from the first principles and numerically simulated in this paper. It is shown that the electromagnetic field of the dipole, penetrating into the metamaterial half-space, is focused into spatial distribution of the field with a pronounced maximum and complex interference structure. The dependence of the focusing on the dipole, position and orientation, as well as losses in metamaterials were studied. A hypothesis that the focusing ability is the property of the interface between ordinary and left-handed media, but not of each of them separately is set forth and qualitative arguments are given.


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