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https://ptsldigital.ukm.my/jspui/handle/123456789/487100Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Mohammad Tariqul Islam, Prof. Dr. | - |
| dc.contributor.author | Ahasanul Hoque (P94155) | - |
| dc.date.accessioned | 2023-10-11T02:28:51Z | - |
| dc.date.available | 2023-10-11T02:28:51Z | - |
| dc.date.issued | 2021-02-27 | - |
| dc.identifier.other | ukmvital:123011 | - |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/487100 | - |
| dc.description | Advanced materials with extraordinary dielectric properties always facilitate the development of the modern device and smart technologies. Metamaterials are one such artificial composite materials, have outstanding electromagnetic features that are redefining the application scope of material technology, particularly in microwave sensing and sensor development. Traditional sensing technology is mostly based on the electromechanical or electronic system. Metamaterial based microwave sensing technique, a benchmark solution, can improve the mechanical, optical, and electromagnetic sensors of sensors. Negative indexed (NI) metamaterial without following design principle shows unstable dielectric characteristics due to bulky size, absence of backward waves characteristics in evanescent field and less control on wave propagation without tunable features. Therefore, this research focuses on developing negative indexed metamaterial absorber based microwave sensing using the uniform transmission principle. The objectives of the study begin by developing a compact metamaterial that simultaneously demonstrates single and double negative features by following the transmission line principle. Secondly, to investigate the proposed metamaterial performance as an absorber and study the absorption characteristics for potential implementation in microwave sensing. After that, tunable features develop on absorbers for anisotropic medium (glucose and cotton) microwave sensing and, eventually, the proposed technique's performance compared with existing metamaterial sensing. Design and analysis of the proposed sensing prototype is performed using the Finite Integration Technique based Computer Simulation Technology microwave studio and Finite Element Method based High-Frequency Structure Simulator software. The uniform transmission line model was analyzed specifically dependent on lumped components for modelling the prototype and verified by the Advanced Design System software frequency domain. Data curation, extraction performed by MATLAB software using Nicolson-Ross-Weir and Direct Refractive Index method. Considering potential design performance in S, X and Ku band, the double square ring geometry shows two specific absorption peaks value of 99.6% and 99.14% achieved at 13.78 GHz and 15.3 GHz, respectively. For the new proposed oval shaped, microwave sensing during measurement achieved an estimated sensitivity of 0.037 GHz shifting for glucose solution though absorption approximately 42.3% and significant negative index (εr=- 16.55 and μr=-65.40). Finally, the uniform transmission line conceived a new proposed microstructure resonator metamaterial absorber (MRMA) that simultaneously demonstrates Single Negative and Double Negative metamaterial features. Evanescent waves on the resonator expedite to achieve a substantial Q factor, both in simulation (23.43) and measured (18.1) environment. Besides, the simulated absorption remained above 90% of tunable metamaterial at 10.62, 11.64, and 12.8 GHz, whereas measured value is 80%. Microwave moisture sensing depicts two independent resonance frequency changes (8.4-8.9 GHz) and (10.6-12.4 GHz) with the moisture content of 16.1% variation on anisotropic medium. Consequently, good sensing accuracy of the medium dielectric constant using the proposed MRMA makes it a potential candidate for microwave sensing applications.,Ph.D. | - |
| dc.language.iso | eng | - |
| dc.publisher | UKM, Bangi | - |
| dc.relation | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | - |
| dc.rights | UKM | - |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | - |
| dc.subject | Dissertations, Academic -- Malaysia | - |
| dc.subject | Metamaterial | - |
| dc.subject | Microwave sensing | - |
| dc.subject | Transmission | - |
| dc.title | Development of compact single negative and double negative metamaterial based microwave sensing using uniform transmission | - |
| dc.type | Theses | - |
| dc.format.pages | 128 | - |
| dc.identifier.barcode | 005638(2021)(PL2) | - |
| Appears in Collections: | Faculty of Engineering and Built Environment / Fakulti Kejuruteraan dan Alam Bina | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_123011+SOURCE1+SOURCE1.0.PDF Restricted Access | 20.59 MB | Adobe PDF |  View/Open | |
| ukmvital_123011+SOURCE2+SOURCE2.0.PDF Restricted Access | 20.59 MB | Adobe PDF |  View/Open |
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