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https://www.um.edu.mt/library/oar/handle/123456789/117566
Title: | Correlating a multiple measurement system for accurate determination of dielectric properties |
Authors: | Grima, Rafel (2023) |
Keywords: | Dielectrics Microwave transmission lines Coaxial cables |
Issue Date: | 2023 |
Citation: | Grima, R. (2023). Correlating a multiple measurement system for accurate determination of dielectric properties (Bachelor's dissertation). |
Abstract: | In this project, two different measurement systems utilising a coaxial transmission line were used to characterise the dielectric properties of lossy materials as a function of frequency, from 100 MHz to 3 GHz. The open-ended coaxial transmission line modelled using an equivalent circuit model developed in-house was used to retrieve the complex permittivity of the material under test from the measured reflection coefficient. Additionally, a closed coaxial transmission line was used to retrieve the complex permittivity of the material under test using a system based on well-known models such as the Nicholson-Ross Weir and the Short-Circuit-line models. The main objective of the project was to conduct measurements using these two methods and compare the results with simulated and standard NPL data. This helps in establishing a benchmark for the closed coaxial transmission in-house developed algorithm which converts from the measured reflection coefficient to the corresponding complex permittivity. A validation process based on comparisons of dielectric measurements of ethanol, methanol, propan2-ol, olive oil and TX100 to simulated data obtained from open-ended coaxial transmission measurements and NPL data was utilised to verify the closed coaxial transmission line. The final part of the project focused on the dielectric measurements of soil. |
Description: | B.Sc. (Hons)(Melit.) |
URI: | https://www.um.edu.mt/library/oar/handle/123456789/117566 |
Appears in Collections: | Dissertations - FacSci - 2023 Dissertations - FacSciPhy - 2023 |
Files in This Item:
File | Description | Size | Format | |
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2308SCIPHY320000012284_1.PDF Restricted Access | 2.86 MB | Adobe PDF | View/Open Request a copy |
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