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PIFA Antenna design for GSM band
Kollár, Marcel ; Čapek, Miloslav (oponent) ; Kadlec, Petr (vedoucí práce)
The main topic of this diploma thesis is a design of the PIFA antenna working in GSM bands. In the beginning there is a brief analysis of planar antennas. The thesis describes PIFA antenna and the techniques for minimization of dimensions of the antenna. Essential part of the thesis is dedicated to multicriterial optimalizaton of the antenna shape. The genetic algorithm programmed in the MATLAB enviroment cooperates with a full-wave solver CST to obrain desired impedance matching of the antenna its radiationt paterns. Also dimensions of the antenna can be minimized using the optimization procedure. Final part of the thesis compares measured data of the optimalized antenna with results obtained in CST Microwave Studio.
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Two-channel nine-band equalizer
Kollár, Marcel ; Kolka, Zdeněk (oponent) ; Petržela, Jiří (vedoucí práce)
The aim of this project has been making the acquaintance of the adjustment of the audio signal of the frequencies switches and the suggestion of the nine band analogue equalizer. The suggestion equalizer was simulating in the program PSpice. Make a printed circuit using Eagle software and construct equalizer also with excitation indicator. The best option for the implementation of the equalizer has seemed to apply of the band’s correctors with the series resonant circuit. Every band in the equalizer has the distinction with the definite resonant frequency f0 and with extent of the correction ±dB. This project points out some options of the adjustment of the audio signal with help frequencies correctors and filters.
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Two-channel nine-band equalizer
Kollár, Marcel ; Kolka, Zdeněk (oponent) ; Petržela, Jiří (vedoucí práce)
The aim of this project has been making the acquaintance of the adjustment of the audio signal of the frequencies switches and the suggestion of the nine band analogue equalizer. The suggestion equalizer was simulating in the program PSpice. Make a printed circuit using Eagle software and construct equalizer also with excitation indicator. The best option for the implementation of the equalizer has seemed to apply of the band’s correctors with the series resonant circuit. Every band in the equalizer has the distinction with the definite resonant frequency f0 and with extent of the correction ±dB. This project points out some options of the adjustment of the audio signal with help frequencies correctors and filters.
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PIFA Antenna design for GSM band
Kollár, Marcel ; Čapek, Miloslav (oponent) ; Kadlec, Petr (vedoucí práce)
The main topic of this diploma thesis is a design of the PIFA antenna working in GSM bands. In the beginning there is a brief analysis of planar antennas. The thesis describes PIFA antenna and the techniques for minimization of dimensions of the antenna. Essential part of the thesis is dedicated to multicriterial optimalizaton of the antenna shape. The genetic algorithm programmed in the MATLAB enviroment cooperates with a full-wave solver CST to obrain desired impedance matching of the antenna its radiationt paterns. Also dimensions of the antenna can be minimized using the optimization procedure. Final part of the thesis compares measured data of the optimalized antenna with results obtained in CST Microwave Studio.
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