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Circularly polarized textile-integrated antenna array
Rujzl, Miroslav ; Láčík, Jaroslav (referee) ; Raida, Zbyněk (advisor)
This bachelor thesis deals with the design of the right-hand circularly polarized antenna arrays operated in the ISM band 5.8 GHz. The planar antenna array is integrated into the 3D textile produced by SINTEX, which is used as upholstery on the roof of a car. In the thesis, several antenna models are described. Models operate with linear and circular polarization. Initial antenna designs were based on a microstrip technology. Later antenna designs are modified using substrate integrated waveguide technology. Finally, a three-element patch array with a coaxial excitation was fabricated and tested.
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Analysis and circuit realization of special chaotic systems
Rujzl, Miroslav ; Hruboš, Zdeněk (referee) ; Petržela, Jiří (advisor)
This master‘s thesis deals with analysis of electronic dynamical systems exhibiting chaotic solution. In introduction, some basic concepts for better understanding of dynamical systems are explained. After introduction, current knowledge from the world of circuits exhibiting chaotic solutions are discussed. The best-known chaotic systems are analyzed numerically in Matlab software. Numerical analysis and experimental verification were demonstrated at C class transistor amplifier, which confirmed the chaotic behavior and generation of a strange attractor.
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Synthesis of higher order passive RLC filters for educational laboratory purposes
Černý, Marek ; Petržela, Jiří (referee) ; Rujzl, Miroslav (advisor)
This bachelor thesis deals with the Synthesis of higher order passive RLC filters. The main target was to design a set of filters for educational laboratory purposes, which will contain filters of different orders and approximations (Chebyshev, Inverse Chebyshev and Cauer). The filters were designed according to design tables for standardized lowpass filters and were subsequently simulated in the PSpice program (Frequency analysis, Monte Carlo, Worst Case). Subsequently, a laboratory preparation was designed and revived. Individual filters were tested and compared with ideal waveforms.
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Design of hybrid computer for modelling of dynamic systems
Rujzl, Miroslav
This paper deals with the design of an analog computer with digitally controlled components for the simulation of linear and nonlinear dynamic systems or for the study of transfer functions of electronic filter or oscillator topologies. The device should allow partial adjustment using a standard computer and also record the measured results in digital form.
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Model Of Chaotic Single Stage Transistor Amplifier In Class C
Rujzl, Miroslav
This article deals with design and experimental verification of a single stage transistoramplifier in class C which is introduced to chaotic state. The basic procedure of deriving differentialequations and representation of dynamical system is presented. Equivalent circuit of transistor stagewas transformed to the real model based on operation amplifier integrators. Chaotic behavior wasconfirmed by strange attractors captured by oscilloscope.
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Analysis and circuit realization of special chaotic systems
Rujzl, Miroslav ; Hruboš, Zdeněk (referee) ; Petržela, Jiří (advisor)
This master‘s thesis deals with analysis of electronic dynamical systems exhibiting chaotic solution. In introduction, some basic concepts for better understanding of dynamical systems are explained. After introduction, current knowledge from the world of circuits exhibiting chaotic solutions are discussed. The best-known chaotic systems are analyzed numerically in Matlab software. Numerical analysis and experimental verification were demonstrated at C class transistor amplifier, which confirmed the chaotic behavior and generation of a strange attractor.
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Circularly polarized textile-integrated antenna array
Rujzl, Miroslav ; Láčík, Jaroslav (referee) ; Raida, Zbyněk (advisor)
This bachelor thesis deals with the design of the right-hand circularly polarized antenna arrays operated in the ISM band 5.8 GHz. The planar antenna array is integrated into the 3D textile produced by SINTEX, which is used as upholstery on the roof of a car. In the thesis, several antenna models are described. Models operate with linear and circular polarization. Initial antenna designs were based on a microstrip technology. Later antenna designs are modified using substrate integrated waveguide technology. Finally, a three-element patch array with a coaxial excitation was fabricated and tested.
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