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Planar bandpass filter with asymmetric resonators
Cholasta, Lukáš ; Kovács, Peter (referee) ; Raida, Zbyněk (advisor)
In this Bachelor thesis the microstrip bandpass filter with asymmetric resonators is described. In this work, the proposal, simulation, construction and resulting confrontation parameters realized microstrip bandpass filter in programme Ansoft Designer are described. In the introduction the problems analysis micro-wave integrated circuitsis are described, further the proposal of a simulation microstrip bandpass filter in programme Ansoft Designer is solved. In the third part of the bachelor thesis the optimalization of the filter for technology of production and realization of the filter are solved. In the conclusion the results of measurement of the realized filter and comparison with simulation are introduced.
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Low Profile Integrated Antenna for GPS and DRSC
Kolb, Lukáš ; Kovács, Peter (referee) ; Raida, Zbyněk (advisor)
In the project, planar antennas for receiving satellite GPS signals and DSRC ones were investigated and mutually combined. The combined antenna was designed for the substrate ARLON, CuClad 217 LX, was modeled and optimized in the program ANSOFT Designer. Attention was turned to the proper impedance matching, directivity properties and polarization properties. The designed antenna was built and their properties were experimentally verified.
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Patch antenna with switchable polarization
Havelka, Michal ; Pokorný, Michal (referee) ; Raida, Zbyněk (advisor)
The bachelor’s thesis deals with the analysis of basic planar antennas, the design methods, optimization and simulation in ANSOFT Designer. Attention is turned to the design of aperture coupled microstrip antennas. First, the antenna with a simple slot is designed. Second, the design of the ring slot coupled microstrip antenna is described. Both the antennas are designed for the operation frequency 2,45 GHz. The second part is devoted to the antenna with switchable polarization. Using three PIN diodes powered by lithium battery of 3-V, the linear polarization (both the horizontal one and the vertical one) and the circular polarization (both the right-hand one and the left-hand one) can be switched. The results were verified by experimental verification.
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Low Noise amplifier for 8,4 GHz
Svoboda, Libor ; Vágner, Petr (referee) ; Kasal, Miroslav (advisor)
This project deals with methods of design and realization of low noise microwave amplifier for X-band. The first part describes this issue at a theoretical level. Thus it contains a detailed analysis of microstrip line and its circuit components. It is followed by some specifics of microstrip filters and with mention of microwave heterojunction transistors. The last chapter of the theoretical part describes design of small-signal amplifier with focus on low noise figure. The second part, practical, shows a concrete procedure of two-stage LNA design with HEMTs, using CAD tool Ansoft Designer. This section, as well as the bachelor’s thesis, is finished with realization of amplifier and analysis of its properties.
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Defected ground planar filters
Tomíček, Martin ; Vágner, Petr (referee) ; Raida, Zbyněk (advisor)
In the bachelor´s thesis, the microstrip low-pass filter with the defected ground is described. The project deals with the design and the simulation of the filter in Ansoft Designer, confrontation of results between simulation and realized low-pass filter and the discussion of obtained results.
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Low Profile Integrated Antenna for GPS and DRSC
Kolb, Lukáš ; Kovács, Peter (referee) ; Raida, Zbyněk (advisor)
In the project, planar antennas for receiving satellite GPS signals and DSRC ones were investigated and mutually combined. The combined antenna was designed for the substrate ARLON, CuClad 217 LX, was modeled and optimized in the program ANSOFT Designer. Attention was turned to the proper impedance matching, directivity properties and polarization properties. The designed antenna was built and their properties were experimentally verified.
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|
|
Low Noise amplifier for 8,4 GHz
Svoboda, Libor ; Vágner, Petr (referee) ; Kasal, Miroslav (advisor)
This project deals with methods of design and realization of low noise microwave amplifier for X-band. The first part describes this issue at a theoretical level. Thus it contains a detailed analysis of microstrip line and its circuit components. It is followed by some specifics of microstrip filters and with mention of microwave heterojunction transistors. The last chapter of the theoretical part describes design of small-signal amplifier with focus on low noise figure. The second part, practical, shows a concrete procedure of two-stage LNA design with HEMTs, using CAD tool Ansoft Designer. This section, as well as the bachelor’s thesis, is finished with realization of amplifier and analysis of its properties.
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Defected ground planar filters
Tomíček, Martin ; Vágner, Petr (referee) ; Raida, Zbyněk (advisor)
In the bachelor´s thesis, the microstrip low-pass filter with the defected ground is described. The project deals with the design and the simulation of the filter in Ansoft Designer, confrontation of results between simulation and realized low-pass filter and the discussion of obtained results.
|
|
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Patch antenna with switchable polarization
Havelka, Michal ; Pokorný, Michal (referee) ; Raida, Zbyněk (advisor)
The bachelor’s thesis deals with the analysis of basic planar antennas, the design methods, optimization and simulation in ANSOFT Designer. Attention is turned to the design of aperture coupled microstrip antennas. First, the antenna with a simple slot is designed. Second, the design of the ring slot coupled microstrip antenna is described. Both the antennas are designed for the operation frequency 2,45 GHz. The second part is devoted to the antenna with switchable polarization. Using three PIN diodes powered by lithium battery of 3-V, the linear polarization (both the horizontal one and the vertical one) and the circular polarization (both the right-hand one and the left-hand one) can be switched. The results were verified by experimental verification.
|
|
|
Planar bandpass filter with asymmetric resonators
Cholasta, Lukáš ; Kovács, Peter (referee) ; Raida, Zbyněk (advisor)
In this Bachelor thesis the microstrip bandpass filter with asymmetric resonators is described. In this work, the proposal, simulation, construction and resulting confrontation parameters realized microstrip bandpass filter in programme Ansoft Designer are described. In the introduction the problems analysis micro-wave integrated circuitsis are described, further the proposal of a simulation microstrip bandpass filter in programme Ansoft Designer is solved. In the third part of the bachelor thesis the optimalization of the filter for technology of production and realization of the filter are solved. In the conclusion the results of measurement of the realized filter and comparison with simulation are introduced.
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