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

ISSN 印刷: 0040-2508
ISSN オンライン: 1943-6009

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Telecommunications and Radio Engineering

DOI: 10.1615/TelecomRadEng.v76.i19.10
pages 1681-1688

DEFECTIVE MODES IN AN ANISOTROPIC WIRE METAMATERIAL IN THE MICROWAVE RANGE

L. I. Ivzhenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
D. I. Yudina
V. Karazin National University of Kharkiv, 4 Svobody Square, Kharkiv, 61077, Ukraine
S. I. Tarapov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine; Kharkiv National University of Radio Electronics 14, Nauka Av, Kharkiv 61166, Ukraine; V. Karazin National University of Kharkiv, 4 Svobody Sq., Kharkiv 61077, Ukraine

要約

At present, considerable attention is focused at investigating defective modes that arise as a result of disturbance of the periodicity in photonic crystals. This interest is provoked by the fact that disturbances of periodicity in nature occur more frequently than the perfect periodicity. The available to date results of theoretical investigations of the defective modes in artificial media (metamaterials) do not provide a complete description of this effect. In the paper, the spectral properties of an anisotropic wire metamaterial with a spatial defect are analyzed within the microwave frequency range. Defective modes have been experimentally detected to exist in the forbidden zone of the transmission spectrum of the anisotropic wire metamaterial with a defect. The positions of the transmission peaks corresponding to appearance of defective modes are analyzed in dependence on the frequency and thickness of the defective layer. The measurement results have been found to be in good agreement with numerical calculations. It is shown that the peaks associated with the defective modes shift toward lower-frequency range as the defective layer thickness is increased. Results of the study can be used in designing various telecommunication devices, including filters, couplers, attenuators, electromagnetic sensors, lenses with sub-wavelength resolution, small-size antennas, objects that are "invisible" within a certain frequency range, etc.


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