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. 2020 Oct 27;10(11):2141. doi: 10.3390/nano10112141

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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(a) Dielectric dissipation factor ( $tg δ_{ε}$ ), (b) attenuation constant (α) of a-T1, a-T2, a-T3 and c-T2. Impedance matching (Z) with different thickness of (c) a-T1, (d) a-T2, (e) a-T3 and (f) c-T2 in the frequency range of 2-18 GHz.