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RFID bus-stop identifacation for sightless people
Straka, Radomír ; Zamazal,, Michal (referee) ; Dušek, Martin (advisor)
The aim of this master’s thesis is to design a device for identification of bus stops for blind people. In the beginning the work describes information about the RFID system, characterizes each part of this system, mutual communication of its components and evaluates possibilities of RFID communication frequency bands. Subsequently the work describes the block diagram of the device and the circuit scheme of each block. Work concentrates on a selection of circuit components for the RFID transceiver, the voice module, the control module and choose a suitable transponder to place it on metal constructions. Control programs are also described. PCB design of each board, partlists and source codes are in the appendices of this master’s thesis.
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Low Noise Amplifiers for frequency range 1-3 GHz
Klegová, Hana ; Zamazal, Michal (referee) ; Kasal, Miroslav (advisor)
This masters thesis deals with low noise amplifier design for frequency range 1 GHz - 3 GHz. There is a short theoretical introduction in the first part of the thesis. There are described parameters and properties of transistors and general two-ports. Description of the noise characteristics two-ports follows. The next capture contains design of two-stage amplifiers. One of them is with a microstrip filter between stages and the second one is with combline filter on input of the amplifier. The amplifiers and the microstrip filter were designed in program ANSOFT Designer. The design of combline filter was realised in program CST Microwave Studio. Both amplifiers ware made and their properties ware compared with simulations.
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RFID Reader for 13.56 MHz Band
Obšitník, Michal ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
Cieľom tejto práce je navrhnúť RFID čítačku pre pásmo 13.56 MHz a zostaviť k nej riadiaci program. V prvej časti je najskôr práca smerovaná k oboznámeniu sa s princípom fungovania technológií RFID a NFC, spolu s tým súvisiacimi medzinárodnými štandardami a k oboznámeniu sa s rôznymi dostupnými čipmi na obsluhu týchto technológií. Keďže čip s ktorým sa bude pokračovať je jasne zadaný v návode, ich porovnanie slúži čisto oboznamovaciemu účelu. V praktickej časti je úloha navrhnúť a oživiť prototyp RFID čítačky. Základom je doska sprostredkúvajúca RFID komunikáciu, audiovizuálnu odozvu a pripojenie k OLED displeju. Táto doska je pripojená na mikrokontrolér na ktorý riadi celé ovládanie zariadenia. Súčasťou projektu je aj set rôznych antén, ktoré je možné na dosku pripojiť a zároveň ich vymieňať. Vyrobené antény sú podrobené testovaniu ako dve rozdielne metódy ladenia ovplyvnia ich chod. Testujú sa maximálna vzdialenosť čítania, úspech prevedených čítaní a hodnota prúdu, ktorá sa vznesie pri kalibračnom procese. Výstupom práce je RFID čítač s riadiacim programom.
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Global Positioning System Signal Emulator
Hofman, Jan ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
Thesis is adressed to the principals of a satellite navigation. It is focused on a determination of a longitude, latitude and altitude of a single point on the surface of the Earth. It contains analysis of navigation messages and a manner of processing of navigation signals in GPS receivers. Realization of an emulator of the navigation signal of GPS system in Matlab is also described. The purpose of this emulator is a generation of navigation messages, which could be transmitted by universal software radio. The last part of thesis contains the analysis of these signals, which were captured by second software radio.
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HF band power amplifier
Korvas, Miroslav ; Zamazal, Michal (referee) ; Šrámek, Petr (advisor)
The theme of my diploma thesis is a realization of the high frequency amplifier with possibility to change its class between class A, B and C with output low pass and band pass filters. The output power is supposed to be at about 10 W in frequency range 3,5 MHz to 14 MHz. The thesis contains theory of amplifier respectively transceiver and filters. In next parts I will design, simulate, realize and measure created amplifier and filters.
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Security application of mmWave sensors
Petržela, Lukáš ; Zamazal, Michal (referee) ; Valach, Soběslav (advisor)
This bachelor thesis is focused on possible use of Texas Instrument´s sensors in security systems, especially for perimeter securing. It includes the overview of radar technology principles and describe of Texas Instrument´s radars principle. Appropriate sensors location has been designed and implemented, and a communication protocol has been designed. The functionality and reliability of the proposed solution has been verified. The results are analyzed and evaluated.
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Mobile Objects Tracking Module
Famfulík, Lukáš ; Zamazal,, Michal (referee) ; Šebesta, Jiří (advisor)
The aim of this thesis is to innovate NCL 07 unit made by NAM system a.s. The new device is intended to have improved parameters and diminished dimensions. It should be fully comparable to similar products on market. In the first part there are described features and individual circuits of NCL07 unit. Further there is done an analysis to suggest modifications leading to reduce proportions of DPS and to enhance other parameters including SW design improvement. Theoretical part deals with selection of main measured values and methods of verification of measurement accuracy. There is also described theoretical basis used in the oncoming sections of the thesis. In the practical part there are presented procedures of designs of innovated product. In the conclusion there will be made testing of new unit and results will be compared to competitive commodities.
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Radiocommunication Monitor for ISM Band at 868 MHz
Frecer, Petr ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
This thesis deals with the design and the realization of the radiocommunication monitor for the 868 MHz band. In the thesis, a description of licence-free radio bands complying ITU recommendations and ETSI standards is given. A special attention is paid to the 863 MHz - 870 MHz band. The transceiver CC1020 that forms the base for the monitor is described in detail. The circuit design, the monitor assembly and the firmware creation are presented step by step. The radiocommunication monitor is portable and battery powered. The monitor is able to display RF signals in the 868 MHz band, to indicate the frequency error of the transmitter and to receive FSK modulated signal. Demodulated data can be transferred to the personal computer via the USB.
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Access Control System using BodyCom Technology
Křístel, Jan ; Zamazal, Michal (referee) ; Povalač, Aleš (advisor)
This master's thesis is primarily focused on the design of an electronic access control system using the BodyCom technology. The first section describes the working principle of this technology and its influence on human body. The second section shows an application of this technology in construction options of the electronic access control system.
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COM Express embedded control module
Malinka, Rostislav ; Zamazal, Michal (referee) ; Valach, Soběslav (advisor)
This thesis deals with design of control embedded module for COM Express interface. It includes block diagram creation and subsequent design of implementation into FPGA. Thesis also contains design of heat dissipation, calculation of current consumption and design of printed circuit board arrangement for this module.
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