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Complex Effective Dielectric Permittivity and Characteristic Impedance of Tunable Coplanar Line

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Abstract

An analysis of complex dielectric permittivity and characteristic impedance of micromechanically tunable coplanar line is presented. The coplanar line parameters tuning is achieved by signal line electrode movement above the substrate or the dielectric plate above the surface of line electrodes. A reconfiguration of electromagnetic field with complex nature occurs as a result of such movement in the line. It is described in terms of effective permittivity and characteristic impedance. We studied an influence of physical and geometrical parameters of the line on characteristics of effective permittivity tuning and change in characteristic impedance and line loss. It is found that proposed method for line tuning parameters allows us to obtain a high sensitivity to movement for effective parameters, wherein the level of losses in the line is not deteriorated, and under certain conditions are reduced. These results make it possible to design high-quality tunable resonant elements and phase shifters based on micromechanically controlled coplanar line.

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Acknowledgements

Preliminary materials of this article were reported at the conference ELNANO-2020 (Kyiv, 2020): A. Chernov, I. Golubeva, V. Kazmirenko, Y. Prokopenko, "Losses in the micromechanically tunable coplanar waveguide based line," Proc. of 2020 IEEE 40th Int. Conf. on Electronics and Nanotechnology, ELNANO, 22-24 April 2020, Kyiv, Ukraine. IEEE, 2020. DOI: 10.1109/ELNANO50318.2020.9088764.

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Authors and Affiliations

  1. National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine

    Artem S. Chernov, Irina P. Golubeva, Victor A. Kazmirenko & Yuriy V. Prokopenko

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  1. Artem S. Chernov
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  2. Irina P. Golubeva
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  3. Victor A. Kazmirenko
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  4. Yuriy V. Prokopenko
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Correspondence to Artem S. Chernov.

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A. S. Chernov, I. P. Golubeva, V. A. Kazmirenko, and Yu. V. Prokopenko

The authors declare that they have no conflict of interest.

The initial version of this paper in Russian is published in the journal “Izvestiya Vysshikh Uchebnykh Zavedenii. Radioelektronika,” ISSN 2307-6011 (Online), ISSN 0021-3470 (Print) on the link http://radio.kpi.ua/article/view/S0021347020060011 with DOI: https://doi.org/10.20535/S0021347020060011

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Chernov, A.S., Golubeva, I.P., Kazmirenko, V.A. et al. Complex Effective Dielectric Permittivity and Characteristic Impedance of Tunable Coplanar Line. Radioelectron.Commun.Syst. 63, 281–288 (2020). https://doi.org/10.3103/S0735272720060011

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  • DOI: https://doi.org/10.3103/S0735272720060011

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