Development of extraction techniques for dielectric constant from free-space measured S-parameters between 50 and 170 GHz


ÖZTÜRK T. , Elhawil A., ULUER İ. , GÜNEŞER M. T.

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS, cilt.28, ss.11543-11549, 2017 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 28 Konu: 15
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1007/s10854-017-6953-z
  • Dergi Adı: JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
  • Sayfa Sayısı: ss.11543-11549

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.