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Beam Shaping Circuits for L Band Antenna
Kalina, Ladislav ; Pítra, Kamil (referee) ; Urbanec, Tomáš (advisor)
This thesis contains design of beamforming network designed for passive radar antennas. The first part contains theory of passive radars and beamforming networks. The next part implies design of beamforming network at the block digram level. Then are choosed circuits for amplitude and phase control, including the design of control communication. It follows by realization of IQ phase shifter and his automatic measurement. Based on this results is phase shifter adjusted and PCB of 2x2 beamforming network is designed. Last part includes design of control application (Matlab) and control program for STM32F407VG microcontroller.
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Communication module for power supplies controlling
Zachar, Jiří ; Šmíd, Petr (referee) ; Dřínovský, Jiří (advisor)
The aim of this work is to design a communication module for laboratory source Manson. This power supply communicates only through a serial RS-232 link. Modern computers usually use for the connection with other peripherals mainly USB. Designed communication module contains converter between the RS-232 and USB. Power supply is used in the automated measurement setup, which is controlled from the Virtual Engineering Environment from the Agilent Technologies. Direct commands for laboratory source Manson are not compatible with the SCPI (Standard Commands for Programmable Instruments) standard commands. So, the communication module converts commands from the SCPI format to Manson supply instructions. The communication with the Manson supply will be obvious for students by using new communication module.
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Wideband 6GHz RF Signal Generator
Mička, Josef ; Kubíček, Michal (referee) ; Urbanec, Tomáš (advisor)
The goal of this thesis is a design of a wideband high frequency generator with an adjustable output amplitude. The generator is based on a frequency synthesizer ADF4355. The power level of an output signal is adjustable by an attenuator HMC1119. The created generator is accesisible trough an user-friendly control panel or by SCPI commands. Frequency synthesis can run in an integer mode or a fractional mode. The output signal has a very low phase noise when it is running in the integer mode.
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Programme for line code demonstration
Zelený, Ondřej ; Hanák, Pavel (referee) ; Prokeš, Aleš (advisor)
The goal of this term paper is to implement basic function for generation of the most commonly used line codes, setting parameter of the generator and data transfer from PC to generator. Teoretical part of this paper describes individual line codes and it’s generation rules. Practival part describes implementation of line codes in MATLAB.
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Drivers for optical spectral analyzer.
Fišer, Michal ; Pikula, Stanislav (referee) ; Mancl, Vlastimil (advisor)
This bachelor thesis describes the application for the control of the optical spectrum analyzer Bristol Instruments 771B-NIR. The purpose of the application is to measure the spectrum of optical signal and wavelength. Theoretical knowledge of wavelength and spectrum measurement and the optical spectral analyzers are summarized in the theoretical part. The practical part focused on the realization of measurement application and library of functions that were created in the LabVIEW environment and the SCPI standard commands are used to control the instrument. Both the application and the library of functions are inspired by the factory-supplied NuVIEW interface.
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Application for magnetic field mapping using F.W.BELL 9950
Kohnheiser, Jan ; Kubásek, Radek (referee) ; Hadinec, Michal (advisor)
The aim of this project is to acquaint the reader with the possibilities of controlling gaussmeter FW Bell 9950 by computer. The thesis analyzes the problems of measurement of magnetic flux density and the measuring instrument itself and its ability to communicate with the PC will be introduced. Next part of the thesis deals with the description and control of the application designed for communication and mapping magnetic field with F.W. Bell 9950.
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Measuring Unit Controlled by Computer
Žižka, Josef ; Dřínovský, Jiří (referee) ; Šebesta, Jiří (advisor)
The object of this work is to meet readers with the basic principle and solution of universal measuring cards for personal computer, project and realise own „Measuring Unit Controlled by Computer“. Comparing parameters nominated unit with commercial using devices. The project describes contituent elements like set analogue inputs for measuring of voltage and current, analogue outputs, digital inputs, digital outputs and counter. The work deals with using standard interface USB for communication between measure unit and host by personal computer. And explanations control program of the microprocessor.
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The Hefaistos System
Mancl, Vlastimil ; Beneš, Petr (referee) ; Pikula, Stanislav (advisor)
This master's thesis describes functionality and principle of the Hefaistos measurement system, which is fully automated and modular. Its purpose is to measure frequency responses of materials and its temperature dependence. The thesis describes all the necessary parts of the modular measurement system. Main part of this system is the control application programmed in LabVIEW software environment. Another necessary parts are impedance analyzers for acquiring frequency dependencies and heating chambers for heating measured materials. The control application ensures hardware synchronization between impedance analyzers and heating chambers. Together they create the Hefaistos system. Modularity of the system means that a user may choose which instrument combination will be used. The system offers choice between three impedance analyzers Agilent 4294A, Wayne Kerr 6520B and HIOKI 3532 LCR Hi-Tester and two heating chambers AOIP GEMINI 700 LRI and AOIP HYPERION. Possibilities of the Hefaistos system are demonstrated on the results of an example measurement.
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Effect of PWM control of a Laser Diode on Its Characteristics
Folta, Lukáš ; Ing. Jan Látal, Ph.D. (VŠB-TUO) (referee) ; Šťáva, Martin (advisor)
This bachelor's thesis deals with the measurement of the characteristics of two semiconductor laser diodes (LD) and its automation. The effect of current control method and LD temperature is compared here. The first chapter is devoted to the theoretical basis of the sub-areas of the experiments, a literature review dealing with laser control using pulse width modulation (PWM) is carried out, and the method of realization of the measured experiments is presented. The second chapter first defines the methods of recalculating the measured data and determines their uncertainties. The following are three subsections presenting the results of individual experiments. The first experiment deals with continuous control and the other two deal with pulse control, one using a commercially available laser driver and the other using a switch designed primarily for this work. The conclusion of the work contains a comparison of the measured results, evaluates their usability and suggests possible extensions of this work.
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Semi-automatic workstation for measuring the properties of electronic circuits
Rozboud, Jakub ; Jeřábek, Jan (referee) ; Dvořák, Jan (advisor)
The bachelor thesis is devoted to the selection of a solution and subsequent implementation of a semi-automated measuring station for measuring active elements in the FGIC44 circuit. The thesis includes a basic analysis of the construction and wiring of the FGIC44 circuit. Remote control and automation of the instruments was implemented using the Keysight VEE Pro development environment. Microsoft excel was used to record and process the measured data. Four supplied chips were measured using the built measurement workstation and the results are included in the appendices of this paper.
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