title: Reduction of S-parameter errors using singular spectrum analysis.
abstract: A free space measurement method, which consists of two horn antennas, a network analyzer, two frequency extenders, and a sample holder, is used to measure transmission (S21) coefficients in 75-110 GHz (W-Band) frequency range. Singular spectrum analysis method is presented to eliminate the error and noise of raw S21 data after calibration and measurement processes. The proposed model can be applied easily to remove the repeated calibration process for each sample measurement. Hence, smooth, reliable, and accurate data are obtained to determine the dielectric properties of materials. In addition, the dielectric constant of materials (paper, polyvinylchloride-PVC, Ultralam® 3850HT, and glass) is calculated by thin sheet approximation and Newton-Raphson extracting techniques using a filtered S21 transmission parameter.
authors.affiliation: Department of Electrical-Electronics Engineering, Karabuk University, Karabuk, Turkey.
authors.forename: Turgut
authors.initials: T
authors.lastname: Ozturk
authors.affiliation: Department of Electrical-Electronics Engineering, Karabuk University, Karabuk, Turkey.
authors.forename: İhsan
authors.initials: İ
authors.lastname: Uluer
authors.affiliation: Millimeter Wave and Terahertz Technologies Research Laboratories (MILTAL), TUBITAK-MRC, Kocaeli, Turkey.
authors.forename: İlhami
authors.initials: İ
authors.lastname: Ünal