|
|
Antenna for receiving of DVB-T signal
Šmarda, Marek ; Lukeš, Zbyněk (referee) ; Pokorný, Michal (advisor)
The content of this work is to study selected antenna systems suitable for receiving of DVB – T. The various antenna systems will be simulated in the program for the simulation of electromagnetic field (e.g, CST Studio) and the simulation results will be commented (e.g. graphs and diagrams of radiation). Selected antenna system will be made and experimentally measured.
|
|
| |
|
| |
|
|
Design of log-periodic antenna
Kliha, Marek ; Nováček, Zdeněk (referee) ; Láčík, Jaroslav (advisor)
This diploma thesis deal with the design of log-periodic antenna. The log-periodic antenna is self-complementary and broadband antenna. Antenna self-complementary structures are described only by angles. Input impedance of log-periodic antenna is equal to theoretical impedance ohms. The input impedance and radiation patterns of broadband antenna structures are independent of frequency over theoretically unlimited bandwidths. The log-periodic antennas provide linearly polarized radiation pattern. In this thesis is designed antenna for bandwidths 1 to 5GHz. In this diploma thesis is introduced design balanced unit, this is compound broadband balun and broadband impedance transformer. The broadband balun is based on conversion of microstrip line to balanced stripline. The Klopfenstein impedance taper is used for design. For simulation was used software from firma Zeland software IE3D.
|
|
| |
|
|
RF Unit for Portable Monitoring Station
Rokos, Lukáš ; Urbanec, Tomáš (referee) ; Záplata, Filip (advisor)
The thesis describes methods for spectrum monitoring, which are used by the Czech telecommunication office. The thesis describes a design of an RF unit for a portable monitoring station and its potential use. The RF unit consists of several devices, which are connected. Devices like an antenna, a rotator, a rotator control unit, coaxial switches, an amplifier and attenuator were chosen as commercially available devices. It is also described, why were these devices chosen. Other devices such as filters, a control unit for the RF unit and a power supply were designed. The RF unit is controlled by a computer. A software for spectrum monitoring contains a graphical user interface for the RF unit control.
|
|
|
Log-periodic antenna for UHF band
Povolný, Ondřej ; Horák, Jiří (referee) ; Láčík, Jaroslav (advisor)
Semestral thesis is focused on the design, analysis and optimization of a log-periodic dipole antenna for UHF measurements. Antenna is introduced with design equations, simulated and optimized to minimize input port reflection coefficient and maximize gain. After that, the antenna cover is introduced and the simulation results are compared for the antenna without cover.
|
|
|
Log-periodic antenna for UHF band
Povolný, Ondřej ; Horák, Jiří (referee) ; Láčík, Jaroslav (advisor)
Semestral thesis is focused on the design, analysis and optimization of a log-periodic dipole antenna for UHF measurements. Antenna is introduced with design equations, simulated and optimized to minimize input port reflection coefficient and maximize gain. After that, the antenna cover is introduced and the simulation results are compared for the antenna without cover.
|
|
|
RF Unit for Portable Monitoring Station
Rokos, Lukáš ; Urbanec, Tomáš (referee) ; Záplata, Filip (advisor)
The thesis describes methods for spectrum monitoring, which are used by the Czech telecommunication office. The thesis describes a design of an RF unit for a portable monitoring station and its potential use. The RF unit consists of several devices, which are connected. Devices like an antenna, a rotator, a rotator control unit, coaxial switches, an amplifier and attenuator were chosen as commercially available devices. It is also described, why were these devices chosen. Other devices such as filters, a control unit for the RF unit and a power supply were designed. The RF unit is controlled by a computer. A software for spectrum monitoring contains a graphical user interface for the RF unit control.
|
|
| |
guest ::
