Development of extraction techniques for dielectric constant from free-space measured S-parameters between 50 and 170 GHz
Journal of Materials Science: Materials in Electronics, cilt.28, sa.15, ss.11543-11549, 2017 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 28 Sayı: 15
- Basım Tarihi: 2017
- Doi Numarası: 10.1007/s10854-017-6953-z
- Dergi Adı: Journal of Materials Science: Materials in Electronics
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.11543-11549
- Sivas Cumhuriyet Üniversitesi Adresli: Hayır
Özet
This paper is a comprehensive study on Newton–Raphson technique used in millimeter wave frequencies for material characterization. Various algorithms are used for extracting the complex permittivity of a material from measured S-parameters. Efficiency of the methods depends on the initial guess and the accuracy of measured S-parameters for each thickness and frequency band. In this paper, we suggest the initial-value estimation method that helps to estimate a proper value for starting the algorithm. Moreover, an alternative extraction process is modelled that does not require new measured S-parameters or extracting process for each frequency band and thickness with a composed database. The estimation process is conducted partially as V (50–75 GHz), W (75–110 GHz), and D (110–170 GHz) frequency bands.