Research on Inner Polar Phase effects for high frequency absorbing materials
Synthesis and Properties of Functional Materials
Final Report Abstract
At the gigahertz frequency range, very high losses were observed for some materials, which couldn´t be explained of any basic high-frequency loss mechanisms. Experimentally and theoretically, it is proven that at gigahertz frequency range in dielectrics with high permeability such major losses appear only when the dielectric material has an internal polar phase (IPP). Within the finished project, the main idea was research on applicability of internal polar phase effects in materials for electromagnetic shielding of wireless communication systems of electronic technology. The suppression of unnecessary radio-electronic noise and the protection of electronic devices from electromagnetic interference by the use of pliable highly microwave radiation absorbing composite materials based on polymers or rubbers filled with conductive and magnetic fillers have been proposed. Since the working frequency bands of electronic devices and systems are rapidly expanding up to the millimeter wave range, the capabilities of absorbing and shielding composites was evaluated for increasing operating frequency. The point is that the absorption capacity of conductive and magnetic fillers essentially decreases as the frequency increases. Therefore, this finished project was devoted to the absorbing capabilities of composites filled with high-loss dielectric fillers, in which absorption significantly increases as frequency rises, and it is possible to achieve the maximum frequency selective of absorption due to electromagnetic and electromechanical resonances.
Publications
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Using the Dielectric Dispersion Oscillator with Distributed Frequency for Analysis of Broadband Resonance Dielectric Spectra. 2020 IEEE 40th International Conference on Electronics and Nanotechnology (ELNANO) (2020, 4), 51-56. American Geophysical Union (AGU).
Poplavko, Yuriy; Tatarchuk, Dmytro & Didenko, Yurii
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Dielectric Permittivity Model for Polymer–Filler Composite Materials by the Example of Ni- and Graphite-Filled Composites for High-Frequency Absorbing Coatings. Coatings, 11(2), 172.
Prokopchuk, Artem; Zozulia, Ivan; Didenko, Yurii; Tatarchuk, Dmytro; Heuer, Henning & Poplavko, Yuriy
