Effects of Calibration Process on Complex Dielectric Permittivity Measurements with Open-Ended Coaxial Probes

Ismail Dilman, Sulayman Joof, Cemanur Aydnalp, Mehmet Nuri Akinci, Mehmet Cayoren

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In this paper, we investigate the short-circuit calibration step of the open-ended coaxial probe (OECP) which is one of the major challenges when measuring complex dielectric permittivity (CDP) of a material under test (MUT). The effect of short-circuit inaccuracy can be mitigated by an alternative calibration approach by taking advantage of the calibration mathematical model of the OECP and using known liquid instead of the commonly used metallic short-circuit procedure. The CDP results of formamide and Dimethyl Sulfoxide (DMSO) as the MUT are compared using three known liquids acetone, butanol, and 2-propanol respectively, as the shorting material during the calibration procedure. The MUT and calibration liquids were simulated with Ansys HFSS simulation program from 0.5 to 6 GHz frequency range with a resolution of 0.25 GHz. The commercially available Speag DAK 3.5-mm OECP was replicated with similar material specifications and dimensions. In order to retrieve the CDPs from reflection coefficients (RCs) obtained from the probe-MUT interface, a multi-frequency Gauss-Newton inversion method based is implemented. The results demonstrate that it is important to select an appropriate calibration material during the calibration procedure to ensure reliable CDP results. The study also indicates that further numerical investigation is required to explain the relationship between the calibration mathematical model and CDP.

Orijinal dilİngilizce
Ana bilgisayar yayını başlığıProceedings of the 21st Mediterranean Microwave Symposium, MMS 2021
EditörlerLuigi Boccia, Luca Catarinucci, Emilio Arnieri, Riccardo Colella
YayınlayanIEEE Computer Society
ISBN (Elektronik)9781665471107
Yayın durumuYayınlandı - 2022
Etkinlik21st Mediterranean Microwave Symposium, MMS 2021 - Pizzo Calabro, Italy
Süre: 9 May 202213 May 2022

Yayın serisi

AdıMediterranean Microwave Symposium
ISSN (Basılı)2157-9822
ISSN (Elektronik)2157-9830


???event.eventtypes.event.conference???21st Mediterranean Microwave Symposium, MMS 2021
ŞehirPizzo Calabro

Bibliyografik not

Publisher Copyright:
© 2022 IEEE.

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