Tunable microwave resonator using liquid metal and 3D printed fluidic channel for the development of microwave spectroscopy
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Rafi, Md. Abdur
issued: 2021-02-08T21:00:37Z
issued: 2021
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: This thesis presents an innovative and practical approach to developing planar resonant-based spectroscopy in microwave sensor technology. Resonant based microwave sensors have drawn attention for decades now in terms of sensing and measuring materials dielectric properties because of demonstrating a higher accuracy, precision, and sensitive measurement compared to non-resonant based sensors. This method has been mostly used on binary solvents due to their ability to display a highly delicate response to the materials under test. This thesis presents a comprehensive analysis of the sensor design and fabrication, sensor characterization, and testing samples to achieve the materials' frequency selective response. Microwave resonator sensors are limited in their current form to a single fixed resonant frequency, leading to issues in selectivity among materials or mixtures with similar dielectric properties. The first study presents a successful effort of achieving a frequency-tunable resonator circuit by utilizing the liquid metal and 3D printed microchannel with a modified split ring resonator. The resonator utilizes liquid metal in a microfluidic channel to change the resonant frequency of the resonator over a wide, continuous spectrum by changing the effective capacitance of the sensor. In the second study, highly sensitive interdigitated capacitive traces have been added with the designed sensor structure for material sensing. The designed and fabricated sensor demonstrated an operating resonant frequency that could be tuned between 2.1 and 2.8 GHz for both solid and liquid sensing. The sensitivity of the designed sensor structure is investigated by sensing standard solid samples, and sensitivity variation was noticed due to the increased reactive loading introduced by the liquid metal. Experimental validation of the sensor and standard liquid mixtures confirmed that the frequency tunability enables similar dielectric materials to be distinctly identified using mul…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/77254
note: Tunable Microwave Resonator UsingLiquid Metal And 3D Printed FluidicChannel For The Development OfMicrowave SpectroscopybyMd. Abdur RafiB.Sc. Engg., Islamic University of Technology (IUT), 2016A THESIS SUBMITTED IN PARTIAL FULFILLMENT OFTHE REQUIREMENTS FOR THE DEGREE OFMASTER OF APPLIED SCIENCEinTHE COLLEGE OF GRADUATE STUDIES(Electrical Engineering)THE UNIVERSITY OF BRITISH COLUMBIA(Okanagan)January 2021© Md. Abdur Rafi, 2021The following individuals certify that they have read, and recommendto the College of Graduate Studies for acceptance, a thesis/dissertation mi-croelectronics:Tunable Microwave Resonator using Liquid Metal and 3Dprinted Fluidic Channel for the Development of MicrowaveSpectroscopysubmitted by Md. Abdur Rafi in partial fulfilment of the requirements ofthe degree of Master of Applied ScienceDr. Mohammad Hossein Zarifi, School of EngineeringSupervisorDr. Ian Foulds, School of EngineeringSupervisory Committee MemberDr. Kevin Golovin, School of EngineeringSupervisory Committee MemberDr. Sina Kheirkhah, School of EngineeringUniversity ExamineriiAbstractThis thesis presents an innovative and practical approach to developingplanar resonant-based spectroscopy in microwave sensor technology. Reso-nant based microwave sensors have drawn attention for decades now in termsof sensing and measuring materials dielectric properties because of demon-strating a higher accuracy, precision, and sensitive measurement comparedto non-resonant based sensors. This method has been mostly used on bi-nary solvents due to their ability to display a highly delicate response to thematerials under test. This thesis presents a comprehensive analysis of thesensor design and fabrication, sensor characterization, and testing samplesto achieve the materials’ frequency selective response.Microwave resonator sensors are limited in their current form to a singlefixed resonant frequency, leading to issues in selectivity among materialsor mixtures with similar dielectric properties. The…
has type: Thesis/Dissertation
date issued: 2021-05
is shown at: 10.14288/1.0395830
language: eng
degree discipline: Electrical Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/77254