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PC Controlled PLL Synthesizer
Málek, Miroslav ; Šrámek, Petr (referee) ; Vágner, Petr (advisor)
The aim of this bachelor´s thesis is a practical realization of computer controlled PLL synthesizer using USB serial port. FT232RL was used as an interface between the PLL synthesizer ADF4110 and PC. A software with graphical user interface was also developed in order to control registers of the syntesizer.
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Frequency synthesizer for microwave communication systems
Klapil, Filip ; Vondra, Vlastimil (referee) ; Kasal, Miroslav (advisor)
The main aim of the thesis is to develop a solution of a frequency synthesizer for a microwave communication systems. Specifically, it suggests a design for frequency synthesizer with phase-locked loop. At beginning of the thesis the principle and basic properties of this method of signal generation are explained. Then it is followed by a brief discussion of the parameters of synthesizers and their influence on design. Another part of the work is the analysis of circuit the frequency synthesizer with the phase-locked loop MAX2871, which is followed by a proposal for the design of the frequency synthesizer module hardware. The last part of the work deals with practical implementation, verification of function and measurement of achieved parameters and their evaluation.
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Control Unit for VHF Radio Receiver with Frequency Synthesizer
Sobotka, Martin ; Šebesta, Jiří (referee) ; Vyskočil, Pavel (advisor)
The aim of this work is to propose the involvement of the control unit for receiving VHF radio and its practical implementation. Adding a panel on the appropriate tuner unit leads to a complete receiver to receive radio broadcasts. My work is to focus on two frequency bands: VHF band for broadcasting and VHF band for air radio communication. This paper describes a process of selection of component, their description and integration into a complete circuit, a description of the control program for the microcontroller and a description of control device. Scheme and the draft for the manufacture of printed circuit board is attached.
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Antenna Mesurement System for Small Satellites
Dovičák, Ivo ; Pospíšil, Martin (referee) ; Urbanec, Tomáš (advisor)
Goal of this thesis was design and realization of a measurement system for measurement of reflection coefficient magnitude for connected antennas in 27-2500 MHz range. Measurement using resistive bridge is chosen as a suitable measurement method. System consists of electronic device controlled by STM32WB microcontroller unit and software for controller PC written in Python programming language using PyQt library. Communication between the device and controller PC is realized using Bluetooth interface. Circuitry for signal generation is based on Phase Locked Loop MAX2870. Device is powered from standard 18650 battery. Dimensions of the designed printed circuit board are suitable for use in CubeSat satellites. System can be used as a frequency synthesizer as well.
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Frequency synthesizer for microwave communication systems
Klapil, Filip ; Vondra, Vlastimil (referee) ; Kasal, Miroslav (advisor)
The main aim of the thesis is to develop a solution of a frequency synthesizer for a microwave communication systems. Specifically, it suggests a design for frequency synthesizer with phase-locked loop. At beginning of the thesis the principle and basic properties of this method of signal generation are explained. Then it is followed by a brief discussion of the parameters of synthesizers and their influence on design. Another part of the work is the analysis of circuit the frequency synthesizer with the phase-locked loop MAX2871, which is followed by a proposal for the design of the frequency synthesizer module hardware. The last part of the work deals with practical implementation, verification of function and measurement of achieved parameters and their evaluation.
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PC Controlled PLL Synthesizer
Málek, Miroslav ; Šrámek, Petr (referee) ; Vágner, Petr (advisor)
The aim of this bachelor´s thesis is a practical realization of computer controlled PLL synthesizer using USB serial port. FT232RL was used as an interface between the PLL synthesizer ADF4110 and PC. A software with graphical user interface was also developed in order to control registers of the syntesizer.
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Control Unit for VHF Radio Receiver with Frequency Synthesizer
Sobotka, Martin ; Šebesta, Jiří (referee) ; Vyskočil, Pavel (advisor)
The aim of this work is to propose the involvement of the control unit for receiving VHF radio and its practical implementation. Adding a panel on the appropriate tuner unit leads to a complete receiver to receive radio broadcasts. My work is to focus on two frequency bands: VHF band for broadcasting and VHF band for air radio communication. This paper describes a process of selection of component, their description and integration into a complete circuit, a description of the control program for the microcontroller and a description of control device. Scheme and the draft for the manufacture of printed circuit board is attached.
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Transmitter for Professional Microphone
Árva, G.
This project deals with the design of a transmitter in a wireless microphone system, which connects to microphone through the XLR connector. The paper contains description of individual blocks which are necessary for processing and transmitting the signal generated by the microphone, describes methods of frequency modulation using a phase locked loop and compares their advantages and disadvantages. As the last, it deals with the choosing of an antenna and its adjustment to appropriate dimensions.
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