Préparation, caractérisation et application du fluide flexible dans l'antenne composite

Abdelrahman, Ameen (2023). Préparation, caractérisation et application du fluide flexible dans l'antenne composite. (Thèse de doctorat). Université du Québec en Abitibi-Témiscamingue. Repéré dans Depositum à https://depositum.uqat.ca/id/eprint/1542

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Résumé

Innovation is generally the main driver of most technological developments. This work deals with a typical example in the communication sector, through the development of some flexible composite-based antennas. The efficiency of ordinary fluidic antenna was increased by using ionic liquid assembled with nano metals composites. They possess unique advantages like their conductivity, flexibility, non-toxicity and profitability. Moreover, they are highly efficient with a radio wave frequency of 2GH applicable in the underground mining sector.
An ideal solution is to realise the EM components on flexible/stretchable materials encapsulation using a micro in polydimethylsiloxane (PDMS) substrates. This thesis contains various innovative and creative aspects divided into different sections.
Chapter one gives the general introducation and the literature review
Chapter two explores the fabrication, characterization, and applications of polydimethylsiloxane and bentonite clay nanocomposites impregnated with silver, copper, and graphene nanoparticles for the fabrication of a stretchable and robust micro-strip antenna. The nanocomposites’ physical, mechanical, and thermal properties were evaluated based on their respective reinforcements’ proportions. The applied techniques included the tensile and flexural tests for the mechanical characterization as well as the rheological and the thermogravimetric analysis. In addition, the surface morphology was evaluated by different techniques such as the X-ray diffraction, the scanning and transmission electron microscopy, and the UV-Vis spectroscopy. Moreover, the conductivity was characterized by electrochemical impedance spectroscopy, the dynamic viscosity analysis, and the ion coupled plasma measurements. The fabricated nanocomposites were shown to be excellent candidates for microstrip antenna applications due to both their electrical conductivity and their mechanical flexibility. These findings pave the way for the fabrication of flexible RF devices for advanced applications in the military, sensor, and space industries.
Chapter three deals with Fabricated Wearable and Flexible Chip made of Gallium and Silver Metals composites assembled on Graphene inside a PDMS Matrix.
Chapter four deals with the topic entitled "Perparation and evaluation of Conductive polymeric composites from Metal and Alloys and Graphene to be future flexible Antenna Device”.
Chapter five presents the Studying and Evaluting The Physical characteristics of the Composite Substrate Chip and its Applications
Chapter six presents the topic entitled “Preparation and Estimation of the physical characterization of Nanofluidic Solution and its application".
Chapter Seven discusses the topic entitled “Specific Integrated Imidazole Solution Incorporating with Metallic Copper-Silver alloys in Nanoscales assembled on Graphene to be applicable FOR Future Antenna Devices ".

Type de document:	Thèse ou mémoires (Thèse de doctorat)
Directeur de mémoire/thèse:	Erchiqui, Fouad
Codirecteurs de mémoire/thèse:	Nadil, Mourad et Siaj, Mohamed
Informations complémentaires:	Établissement d'enseignement d'extension : Université du Québec à Chicoutimi
Mots-clés libres:	Fludic Antenna, Graphane , cermic ,composite , chemical and physical characterization , Material composte ,Radio ,frequence ,applicatble 2.4 GHz , elctrolyte , conductive polymer , safety communcation
Divisions:	Génie > Doctorat en ingénierie
Date de dépôt:	14 mars 2024 13:20
Dernière modification:	14 mars 2024 13:20
URI:	https://depositum.uqat.ca/id/eprint/1542

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