Method of Measurements of Relative Permittivity and Dielectric Loss Tangent of Micropowders in a Wide Frequency Range
| Authors | A.O. Dumik1, A.A. Kalenyuk1,2, V.O. Moskaliuk1,2, A.P. Shapovalov1,2, S.I. Futimsky1, O.G. Turutanov3, V.Yu. Lyakhno3 |
| Affiliations |
1G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 6, Academician Vernadsky Blvd., 03142 Kyiv, Ukraine 2Kyiv Academic University, 03142 Kyiv, Ukraine 3Verkin Institute for Low Temperature Physics and Engineering, NAS of Ukraine, 7, Nauky Ave., 61103 Kharkiv, Ukraine |
| Е-mail | |
| Issue | Volume 14, Year 2022, Number 2 |
| Dates | Received 08 February 2022; revised manuscript received 19 April 2022; published online 29 April 2022 |
| Citation | A.O. Dumik, A.A. Kalenyuk, V.O. Moskaliuk, et al., J. Nano- Electron. Phys. 14 No 2, 02006 (2022) |
| DOI | https://doi.org/10.21272/jnep.14(2).02006 |
| PACS Number(s) | 41.20.Jb, 84.40. – x, 84.30.Vn, 61.43.Gt |
| Keywords | Coaxial line, Micropowders, Relative permittivity, Dielectric loss tangent, Phase change (2) , Graphene oxide (2) . |
| Annotation |
Dielectric and magnetic powders find their use in a wide spectrum of scientific and technical tasks. For example, micropowders are used as a base of microwave absorbing coverage for the reflection reduction of the electromagnetic waves in the anti-radar systems. In the modern quantum computing and ultra-low noise detectors, they are used as a filling of the coaxial thermal blocking filters. Such filters are extremely necessary to ensure the noise shielding of deeply cooled devices from the measurement equipment under room temperature. For correct calculations of devices based on micropowders, it is essential to obtain their dielectric and magnetic properties. For this reason, parallel plates and induction techniques are used in the low-frequency range, and waveguide methods are used in the HF and SHF ranges. An experimental method for determining the dielectric and magnetic properties of micropowders that covers the meter to centimeter range is proposed. The main idea is to measure frequency dependences of losses and phase changes of the signal transmitted through a coaxial line segment with powder filling. Using the stated technique, we perform the measurements of graphene oxide, graphite and carbonyl iron micropowders, and the values of relative permittivity/permeability and loss tangent in the range 300 kHz – 26.5 GHz are obtained. The structural analysis of the shape and dimensions of micropowders grains is given. Determination of a reliable frequency range for measuring the dielectric/magnetic parameters of investigated micropowders is obtained, and the sensitivity of the offered technique is estimated. |
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List of References |
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