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Electronic Components in Textile Substrates
Kokolia, Martin ; Joler,, Miroslav (oponent) ; Dražan, Libor (oponent) ; Raida, Zbyněk (vedoucí práce)
Goal of this thesis is to describe state of the art in the field of textile-based microwave components and then also author's contribution to research. There are many problems to solve in this field of study and thus very specific goals are stated that should form complete communication system that would be easily integrable into upholstery inside airplane or other vehicle. First chapter is aimed on the relatively low frequency UHF circuit application and the RF energy harvester. The simulations are followed by practical measurements. Next chapter is characterizing the novel 3D-knitted fabrics and their RF proprieties modeling on very high frequencies that are desired to be used as communication channels. With textile substrate validated and described for use at SHF band novel textile integrated waveguide base on printable artificial magnetic conductor structure is presented with practical methodology of design. After validation, the waveguide was utilized for basic power divider, two different antennas and two types of sensors. All designs were manufactured and tested with satisfactory results.
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Design and Optimization of Electromagnetic Band Gap Structures
Kovács, Peter ; Škvor,, Zbyněk (oponent) ; Dědková, Jarmila (oponent) ; Lukeš, Zbyněk (vedoucí práce)
The thesis deals with the design and optimization of periodic structures for surface waves suppression on electrically dense dielectric substrates. The design of such structures is rather complicated due to the large factor of uncertainty how the electromagnetic band gap (EBG) properties change depending on the unit cell geometry. Without a proper approach, the design of EBGs is based on trial-and-error. In this thesis, the basic theory of electromagnetic wave propagation in metamaterials is presented first. Second, the correct dispersion diagram computation in the selected full-wave software tools is discussed. The main attention is turned then to the automated design and optimization of EBG structures using different global evolutionary algorithms. The practical exploitation of the developed technique is demonstrated on design examples of reduced-size and dual-band EBGs, periodic structures with simultaneous electromagnetic band gap and artificial magnetic conductor (AMC) properties and periodic structures acting as superstrates. The last chapter of the thesis is devoted to the experimental verification of computer models.
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Electronic Components in Textile Substrates
Kokolia, Martin ; Joler,, Miroslav (oponent) ; Dražan, Libor (oponent) ; Raida, Zbyněk (vedoucí práce)
Goal of this thesis is to describe state of the art in the field of textile-based microwave components and then also author's contribution to research. There are many problems to solve in this field of study and thus very specific goals are stated that should form complete communication system that would be easily integrable into upholstery inside airplane or other vehicle. First chapter is aimed on the relatively low frequency UHF circuit application and the RF energy harvester. The simulations are followed by practical measurements. Next chapter is characterizing the novel 3D-knitted fabrics and their RF proprieties modeling on very high frequencies that are desired to be used as communication channels. With textile substrate validated and described for use at SHF band novel textile integrated waveguide base on printable artificial magnetic conductor structure is presented with practical methodology of design. After validation, the waveguide was utilized for basic power divider, two different antennas and two types of sensors. All designs were manufactured and tested with satisfactory results.
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Design and Optimization of Electromagnetic Band Gap Structures
Kovács, Peter ; Škvor,, Zbyněk (oponent) ; Dědková, Jarmila (oponent) ; Lukeš, Zbyněk (vedoucí práce)
The thesis deals with the design and optimization of periodic structures for surface waves suppression on electrically dense dielectric substrates. The design of such structures is rather complicated due to the large factor of uncertainty how the electromagnetic band gap (EBG) properties change depending on the unit cell geometry. Without a proper approach, the design of EBGs is based on trial-and-error. In this thesis, the basic theory of electromagnetic wave propagation in metamaterials is presented first. Second, the correct dispersion diagram computation in the selected full-wave software tools is discussed. The main attention is turned then to the automated design and optimization of EBG structures using different global evolutionary algorithms. The practical exploitation of the developed technique is demonstrated on design examples of reduced-size and dual-band EBGs, periodic structures with simultaneous electromagnetic band gap and artificial magnetic conductor (AMC) properties and periodic structures acting as superstrates. The last chapter of the thesis is devoted to the experimental verification of computer models.
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