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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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Broadband White Noise Meter
Klegová, Hana ; Záplata, Filip (referee) ; Kasal, Miroslav (advisor)
This semestral thesis deal with measuring noise cosmic objects with broad microwave receiver with cutoff frequency 144 - 149 MHz. In this thesis is designed broad white noise meter due to reference value „cold sky“. There are described properties white noise in radiofrequency part of spectrum and ways of measuring it. Further is in this thesis modeled bandpass filter including broad-band amplifiers in program ANSYS Designer and designed Printed Circuit Boards in program Eagle.
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LNA for Amateur Radio Bands
Děcký, Miroslav ; Pospíšil, Martin (referee) ; Povalač, Aleš (advisor)
The thesis deals with a draft and inclusion of a low noise preamplifier – LNA in a signal route of a radioamateur stage. It also deals with measuring, comparing and subsequently choosing suitable relays for HF application. For the resulting LNA system are designed bandpass filters and also sequencer for correct and safe timing.
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HF and IF circuits of shortwave radiostation
Šnajdr, Václav ; Vágner, Petr (referee) ; Lukeš, Zbyněk (advisor)
The study, description, design and implementation of selected blocks of multiband shortwave radio station are dealt with in the thesis. Focus is placed on the concept of multiband shortwave radio stations, with an emphasis on high frequency and intermediate frequency circuits. The first chapter is devoted to description of the transceiver block diagram which is designed as superheterodyne. The design of bandpass input filters, intermediate frequency crystal filters and output filters is described. Simulation results and the measured characteristics of the implemented functional blocks are presented. Furthermore, the amplifier circuits which maintain impedance matching of individual blocks are discussed. SSB signal generation in the transmitter part of radio station and final stage power amplification are depicted.
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Active electrical filters based on switched-capacitor circuits
Třeček, Stanislav ; Dostál, Tomáš (referee) ; Brančík, Lubomír (advisor)
This thesis deals with concept of universal frequency filter by application of a switched-capacitor functional block. The concept is based on the theory of switched-capacitor circuits and the theory of a design of classical frequency filters. The printed circuit board was designed based on the filter connection developed by using a software Eagle. The filter was implemented as a laboratory product. This product has been revitalized and the frequency response of all types of filters has been measured. The measured parameters were compared with the parameters set out in the technical documentation of functional block.
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Laboratory task dedicated to filters with switched capacitors
Khaibullin, Rishat ; Šotner, Roman (referee) ; Petržela, Jiří (advisor)
This thesis describes the basic principles of circuits based on switched capacitor technology. The advantages of using this technology are described, and the different connection types of switched capacitors are shown. A graphic comparison of the operation of classic analog filters and filters based on switched capacitor technology is also provided. A solution for the implementation of a laboratory board for use in education is offered. The board has been successfully tested, and an example of a laboratory problem solution is given.
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LNA for Amateur Radio Bands
Děcký, Miroslav ; Pospíšil, Martin (referee) ; Povalač, Aleš (advisor)
The thesis deals with a draft and inclusion of a low noise preamplifier – LNA in a signal route of a radioamateur stage. It also deals with measuring, comparing and subsequently choosing suitable relays for HF application. For the resulting LNA system are designed bandpass filters and also sequencer for correct and safe timing.
|
|
|
Broadband White Noise Meter
Klegová, Hana ; Záplata, Filip (referee) ; Kasal, Miroslav (advisor)
This semestral thesis deal with measuring noise cosmic objects with broad microwave receiver with cutoff frequency 144 - 149 MHz. In this thesis is designed broad white noise meter due to reference value „cold sky“. There are described properties white noise in radiofrequency part of spectrum and ways of measuring it. Further is in this thesis modeled bandpass filter including broad-band amplifiers in program ANSYS Designer and designed Printed Circuit Boards in program Eagle.
|
|
|
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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|
|
Active electrical filters based on switched-capacitor circuits
Třeček, Stanislav ; Dostál, Tomáš (referee) ; Brančík, Lubomír (advisor)
This thesis deals with concept of universal frequency filter by application of a switched-capacitor functional block. The concept is based on the theory of switched-capacitor circuits and the theory of a design of classical frequency filters. The printed circuit board was designed based on the filter connection developed by using a software Eagle. The filter was implemented as a laboratory product. This product has been revitalized and the frequency response of all types of filters has been measured. The measured parameters were compared with the parameters set out in the technical documentation of functional block.
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