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Switched battery charger
Špatenka, Vojtěch ; Kubíček, Michal (referee) ; Kovář, Jan (advisor)
My bachelor thesis deals proposal of switch battery charger and with an issue of charging lead-acid accumulators. It describes their attributes and charging characteristics. Futhermore, it describes a concept and a construction of a switch-mode power supply for charging of these accumulators. The design of a switch-mode power supply according to the programme PI EXPERT 7, the design of an impulsive compensator, the choise of a framework and a centre core, a full-scale scheme of a connection, the design of a PCB, a materials scheduling and their layout on the plate. A concept of controls of the switch-mode power supply using single-chip microprocessor C8051F320 HQ manufactured by Silicon Laboratories. A scheme of integration, a concept of the printed circuit board and a specification of components. At the end of the bachelor thesis was made a suitable chassis from the polycarbonate material. The results and the evaluation of the basic parameters of the of the switch-mode power supply are included.
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Wideband planar antennas
Špatenka, Vojtěch ; Tkadlec, Roman (referee) ; Wolanský, David (advisor)
In this master´s thesis an issue of broadband planar antennas was analyzed. Firstly, the basic elements that affect bandwidth, such as the influence of the dieletric substrate, suitable shape or feeding network, were described. Furthermore technics that can be used to widen the band of the planar antennas were described. These technics were applied to a chosen type of a planar antenna. This antenna was modeled and simulated for desired dielectric substrate in CST STUDIO SUITE 2010 software. Feeding network with power dividers was designed for the antenna array. In order to obtain a higher gain, the antenna was implemented into the 2x2 element array. The results of the simulation are evaluated in the conclusion.
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Switched battery charger
Špatenka, Vojtěch ; Kubíček, Michal (referee) ; Kovář, Jan (advisor)
My bachelor thesis deals proposal of switch battery charger and with an issue of charging lead-acid accumulators. It describes their attributes and charging characteristics. Futhermore, it describes a concept and a construction of a switch-mode power supply for charging of these accumulators. The design of a switch-mode power supply according to the programme PI EXPERT 7, the design of an impulsive compensator, the choise of a framework and a centre core, a full-scale scheme of a connection, the design of a PCB, a materials scheduling and their layout on the plate. A concept of controls of the switch-mode power supply using single-chip microprocessor C8051F320 HQ manufactured by Silicon Laboratories. A scheme of integration, a concept of the printed circuit board and a specification of components. At the end of the bachelor thesis was made a suitable chassis from the polycarbonate material. The results and the evaluation of the basic parameters of the of the switch-mode power supply are included.
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|
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Wideband planar antennas
Špatenka, Vojtěch ; Tkadlec, Roman (referee) ; Wolanský, David (advisor)
In this master´s thesis an issue of broadband planar antennas was analyzed. Firstly, the basic elements that affect bandwidth, such as the influence of the dieletric substrate, suitable shape or feeding network, were described. Furthermore technics that can be used to widen the band of the planar antennas were described. These technics were applied to a chosen type of a planar antenna. This antenna was modeled and simulated for desired dielectric substrate in CST STUDIO SUITE 2010 software. Feeding network with power dividers was designed for the antenna array. In order to obtain a higher gain, the antenna was implemented into the 2x2 element array. The results of the simulation are evaluated in the conclusion.
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