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https://ptsldigital.ukm.my/jspui/handle/123456789/464290Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Mohammad Rashed Iqbal Faruque, Assoc. Prof. Dr. | |
| dc.contributor.author | Eistiak Ahamed (P90561) | |
| dc.date.accessioned | 2023-09-26T09:26:11Z | - |
| dc.date.available | 2023-09-26T09:26:11Z | - |
| dc.date.issued | 2019 | |
| dc.identifier.other | ukmvital:117540 | |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/464290 | - |
| dc.description | Metamaterial, a novel artificial composite capable of scattering incoming radiation with high precision, has large potential for designing sensing device. Conventional sensors have low sensitivity due to its weak field response and low localization. Metamaterial can create strong sensitivity due to its field response, but it needs to be increased for obstacle detecting. Tunnel inspired metamaterial can create strong field effect that can be used to improve the sensor selectivity in detecting small amount of analysts. Therefore, this study aims to fulfil three main objectives; to develop a metamaterial prototype that can geometrically sensitive, to develop a tunnel insertion technique to enhance field response, and finally to validate the sensitivity of developed metamaterial structure utilized as obstacle sensor. Firstly, a new compact joint T-D geometry designed on the flexible NiAl2O4 substrate and the structure exhibit biaxial tunable properties by adjusting its geometries. After that, RLC and LC structure are designed on FR4 substrate because of the unavailability of flexible substrate. To enhance the field response of the metamaterial, a special kind of tunnel inspired resonator strategy is proposed with better sensor characteristics. An RLC and a LC resonator structure is introduced for tunneling that increases E- and H-field responses when electromagnetic waves propagate across the structure. These structures are impressively enhancing the electric and magnetic field response on structure when an electromagnetic field hit on dielectric-metal interface. Because of this increased E- and H-field, the structure can introduce better sensing performance compared to the conventional metamaterial- structure. Finally, the RLC and LC resonator-based metamaterial structures are employed as a sensor, operating in the X-band (8.84GHz) and C-band (6.88 GHz) of the microwave region, and its sensing properties are tested using glossy paper as an obstacle. The RLC array prototype shows measure resonance at 8.86 GHz and the combination of the glossy paper and the tunnel metamaterial array prototype shows resonance at 8.62 GHz (creating sensitivity 200MHz). Whereas, conventional (SRR) metamaterial shows only 50 MHz sensitivity. The tested LC structure array prototype shows resonance at 6.86 GHz and the glossy paper-prototype combination shows resonance at 6.70 GHz (representing a shift of 160 MHz).In both structure the obstacle-prototype combination exhibits higher attenuation shifting 8.89 dB (RLC) and 7.5 dB (LC) as compared to that of the array metamaterial transmission coefficient, but in case of conventional metamaterial the sensing combination system shows almost the same transmission coefficient attenuation. The designed metamaterial tunneling structure exhibits very high sensitivity toward dielectric obstacles at different rotational angles and thus can be potentially used in various sensing applications.,Master of Science | |
| dc.language.iso | eng | |
| dc.publisher | UKM, Bangi | |
| dc.relation | Institute of Climate Change / Institut Perubahan Iklim | |
| dc.rights | UKM | |
| dc.subject | Electronic circuits | |
| dc.subject | Surface plasmon resonance | |
| dc.subject | Universiti Kebangsaan Malaysia -- Dissertations | |
| dc.subject | Dissertations, Academic -- Malaysia | |
| dc.title | Development of a tunnel resonator inspired left-handed metamaterial for sensing application | |
| dc.type | theses | |
| dc.format.pages | 122 | |
| dc.identifier.callno | TK7867.A373 2019 tesis | |
| dc.identifier.barcode | 004481(2020) | |
| Appears in Collections: | Institute of Climate Change / Institut Perubahan Iklim | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_117540+SOURCE1+SOURCE1.0.PDF Restricted Access | 10.38 MB | Adobe PDF |  View/Open |
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