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Article

Simple, Fast, and Accurate Broadband Complex Permittivity Characterization Algorithm: Methodology and Experimental Validation from 140 GHz up to 220 GHz

1
School of Electronics and Information Engineering, Xi’an Jiaotong University, Xi’an 710049, China
2
Beijing Institute of Technology (Tangshan) Translational Research Center, Tangshan 063000, China
3
Department of Electrical Engineering, University of Leuven, 3001 Leuven, Belgium
4
Department of Biomedical and Dental Sciences and Morphofunctional Imaging, University of Messina, 98125 Messina, Italy
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Hirokazu Kobayashi, Pingyi Fan and Andrea Randazzo
Electronics 2022, 11(3), 366; https://doi.org/10.3390/electronics11030366
Received: 23 December 2021 / Revised: 17 January 2022 / Accepted: 24 January 2022 / Published: 26 January 2022
Accurate permittivity characterization has attracted a lot of attention in various areas. Resonant characterization methods are well-known for their accuracy, but they are restricted in very narrow frequency ranges, and thus, they are normally not recommended to be used for dispersive or high-loss materials. Transmission line characterization techniques are outstanding for being inexpensive, accurate, and broadband, but the algorithms are often complex to perform. This paper proposes a fast, simple, and accurate broadband permittivity characterization algorithm, which is mainly suitable for millimeter-wave applications. It combines a general line–line method and a closed-form algorithm, extracting the complex permittivity of the material under test (MUT) without the need for calculating any intermediate parameters. Validation measurements on de-ionized water in the frequency range from 140 to 220 GHz are in very good agreement with the literature data, which successfully indicates that the proposed algorithm is reliable and accurate for millimeter wave permittivity characterization. View Full-Text
Keywords: accurate characterization; broadband permittivity; coplanar waveguide; millimeter waves; simple algorithm accurate characterization; broadband permittivity; coplanar waveguide; millimeter waves; simple algorithm
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MDPI and ACS Style

Bao, X.; Wang, L.; Wang, Z.; Zhang, J.; Zhang, M.; Crupi, G.; Zhang, A. Simple, Fast, and Accurate Broadband Complex Permittivity Characterization Algorithm: Methodology and Experimental Validation from 140 GHz up to 220 GHz. Electronics 2022, 11, 366. https://doi.org/10.3390/electronics11030366

AMA Style

Bao X, Wang L, Wang Z, Zhang J, Zhang M, Crupi G, Zhang A. Simple, Fast, and Accurate Broadband Complex Permittivity Characterization Algorithm: Methodology and Experimental Validation from 140 GHz up to 220 GHz. Electronics. 2022; 11(3):366. https://doi.org/10.3390/electronics11030366

Chicago/Turabian Style

Bao, Xiue, Li Wang, Zeyu Wang, Jiabei Zhang, Meng Zhang, Giovanni Crupi, and Anxue Zhang. 2022. "Simple, Fast, and Accurate Broadband Complex Permittivity Characterization Algorithm: Methodology and Experimental Validation from 140 GHz up to 220 GHz" Electronics 11, no. 3: 366. https://doi.org/10.3390/electronics11030366

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