S-Parameters Extraction of a Desired Network With Time-Domain Gates

Deng, Lingyu; Chen, Xiaolong; Li, Yajun

doi:10.2528/pierl16050609

Cited by 2 publications

(1 citation statement)

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“…Because of the practical difficulties, thickness and position invariant calibrations has been investigated both in FD [41][42][43][44] and in TD [45]. Observe that the TD analysis has been used in the GRL calibration [39,40], for extracting a desired part of a network [46] and also in TD extraction from measured FD data [45]. In this way, it is interesting to have a flexible procedure for the signal processing.…”

Section: Calibrationmentioning

confidence: 99%

Free-Space Materials Characterization by Reflection and Transmission Measurements using Frequency-by-Frequency and Multi-Frequency Algorithms

Gonçalves

Pinto²,

Mesquita

et al. 2018

Electronics

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The knowledge of the electromagnetic constitutive properties of materials is crucial in many applications. Free-space methods are widely used for this purpose, despite their inherent practical difficulties. This paper describes an affordable free-space experimental setup for the characterization of flat samples in 1–6 GHz in a non-anechoic environment. The extracted properties are obtained from the calibrated Scattering Parameters, using a frequency-by-frequency solution or a multi-frequency reconstruction. For the first, we describe how the Time-Domain Gating can be implemented and used for filtering the signals. For the latter, a weighting factor is introduced to balance the reflection and transmission data, allowing one to have a more favorable configuration. The different role of transmission and reflection measurements on the achievable results is analyzed with regard to experimental uncertainties and different noise scenarios. Results from the two strategies are analyzed and compared. Good agreement between simulation, measurement and literature is obtained. According to the reported results for dielectric materials, there is no need of filtering the data by a Time-Domain Gating in case of the multi-frequency approach. Experimental results for Polymethylmethacrylate (PMMA) and Polytetrafluorethylene (PTFE) samples validate both the setup and the processing.

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