Application of the Kalman Filter/Smoother for accurate material characterization of planar dielectric samples by using free-space measurements at sub-THz frequencies

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00177016%3A_____%2F23%3AN0000039" target="_blank" >RIV/00177016:_____/23:N0000039 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0263224123001410" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0263224123001410</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.measurement.2023.112577" target="_blank" >10.1016/j.measurement.2023.112577</a>

Result language
angličtina
Original language name
Application of the Kalman Filter/Smoother for accurate material characterization of planar dielectric samples by using free-space measurements at sub-THz frequencies
Original language description
The Kalman Filter/Smoother, as a new post-calibration technique, has been successfully applied for accurate relative complex permittivity epsr extraction of planar dielectric samples using sub-THz free-space transmission scattering parameter s21 measurements. Extracted epsr of the planar polyvinylchloride and polymethylmethacrylate samples without any post-calibration procedure produced non-physical results (violation of the passivity principle) over some frequencies in three frequency bands between 50 and 75 GHz, 75 and 110 GHz, and 110 and 170 GHz, indicating the importance of the application of a post-calibration procedure. It has been demonstrated by s21 measurements and extracted epsr that the Kalman Smoother and the Savitzky–Golay filter, as the other post-calibration technique, produce little offset or deviation in the extracted epsr around the lowest and highest frequencies over the frequency band (or at the intersection of individual frequency bands), as compared with that of the singular spectrum analysis technique, considered as another post-calibration technique.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20201 - Electrical and electronic engineering

Project
<a href="/en/project/7AX13009" target="_blank" >7AX13009: Microwave and terahertz metrology for homeland security</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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