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.

Artificial intelligence solution to extract the dielectric properties of materials at sub‐THz frequencies

“…To obtain more accurate results, the extraction techniques should be compared according to the above criteria and the most suitable one should be determined. Collected data by VNA is needed to purify from errors and noise, if it is needed as described in detail in [40]. Indeed, the accuracy of the calibration is deteriorated especially while long-term measurements.…”