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Nonradiating and radiating configurations driven by left-handed metamaterials

Boardman, AD; Marinov, K

Authors

AD Boardman

K Marinov



Abstract

It is shown that a pair of identical emitters (e.g., wire dipole antennas) in the focal points of a disk, made of left-handed metamaterial (a perfect lens), forms a nonradiating electromagnetic configuration. The emitters are fed with voltages of equal magnitude and pi out of phase. Detailed finite-difference time-domain modeling shows that nonpropagating electromagnetic fields are generated—fields that remain confined within the region between the emitters and the lens. The energy balance of the system shows that the radiation resistance of the system is low. This means that the input power is converted into heat in the volume of the lens, and only a small fraction of it is radiated. The system performance shows that disturbing the configuration of the nonpropagating electromagnetic fields with the presence of an externally introduced object stimulates radiation. This suggests possible detector applications. In-phase feeding voltages are also studied with the consequence that the radiation resistance of the antennas is increased.

Citation

Boardman, A., & Marinov, K. (2006). Nonradiating and radiating configurations driven by left-handed metamaterials. https://doi.org/10.1364/JOSAB.23.000543

Journal Article Type Article
Publication Date Mar 1, 2006
Deposit Date Aug 23, 2007
Journal Journal of the Optical Society of America B: Optical Physics (JOSA B)
Print ISSN 07403224
Peer Reviewed Peer Reviewed
Volume 23
Issue 3
Pages 543-552
DOI https://doi.org/10.1364/JOSAB.23.000543
Keywords Microwaves, waves
Publisher URL http://dx.doi.org/10.1364/JOSAB.23.000543




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