Mykola Kokodii, Denys Protektor, Darya Gurina, V. O. Maslov, Iryna Hariachevska, Ivan Priz
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引用次数: 0
Abstract
In this paper, there are researched resonance effects occurring when an electromagnetic wave falls on a cylinder. The nature of the effects depends on the ratio between the diameter of the cylinder and the wavelength of the radiation and on the cylinder material. In thick cylinders (D ≫ λ) without absorption, surface wave resonances occur in the form of peaks regularly following each other on the curve of dependence of scattering on the diameter. The follow-up period is determined by the refractive index. In very thin metal wires (D ≪ λ) the effect of abnormally strong absorption of electromagnetic radiation is observed. The absorption efficiency factor of a metal wire with a diameter of several micrometers in the centimeter range of wavelengths reaches several hundred. Calculations of the distribution of the electromagnetic field inside and outside the wire showed a significant increase in the intensity of the electromagnetic field inside the cylinder at certain ratios between the diameter of the wire and the wavelength of radiation. The trajectories of the Poynting vector flow are distorted, and energy enters the wire from all sides. This effect is non-resonant. Fano resonances occur in thin cylindrical wires with a high refractive index and low absorption. At the same time, for some diameters, the scattering increases, and a very narrow resonant peak appears, while for others, the scattering is very small. The wire becomes invisible at a certain wavelength.
期刊介绍：
Radioelectronics and Communications Systems covers urgent theoretical problems of radio-engineering; results of research efforts, leading experience, which determines directions and development of scientific research in radio engineering and radio electronics; publishes materials of scientific conferences and meetings; information on scientific work in higher educational institutions; newsreel and bibliographic materials. Journal publishes articles in the following sections:Antenna-feeding and microwave devices;Vacuum and gas-discharge devices;Solid-state electronics and integral circuit engineering;Optical radar, communication and information processing systems;Use of computers for research and design of radio-electronic devices and systems;Quantum electronic devices;Design of radio-electronic devices;Radar and radio navigation;Radio engineering devices and systems;Radio engineering theory;Medical radioelectronics.
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