EMPLAB|FEKT VUT Brno
The set of assignments is expanded continuously and can be modified to suit the applicant, respecting his or her interests and skills. Please do not hesitate to contact us for the latest information.
The aim is to design and manufacture a tool that measures the amplitudes of two RF signals and their phase shift. This tool will be either self-contained or integrated in an RF power source, depending on the student’s preference.
The aim is to fabricate a tool that measures the amplitudes of two RF signals and their phase shift. This tool will be either self-contained or integrated in an RF power source, depending on the student’s preference.
The aim is to design and produce a moving setup to position a measuring probe in a 3D space. Based on the applicant’s track of study, the work may involve compiling an automated measurement protocol or application using the setup created. Finally, the data acquired will be subject to an analysis.
The project is centered on designing a radiometer to detect microwave noise. The device will be embedded in an experimental system for verifying the measurability of material parameters and performing tomography with a microwave noise field. The main tasks are within the design and fabrication of electronic circuits.
A noise electromagnetic field can theoretically be generated via an array of antennas (such as dipoles) to ensure the desired irradiated power. Expectably, the project then focuses on designing, delivering, and verifying this type of field. The applicant will need to simulate an electromagnetic field by means of applicable software, fabricate the emitter, and measure the product experimentally.
When measuring very weak signals, we can employ the sychronous detection principle, where the intensity of the carrier quantity is modulated at a frequency to be subsequently demodulated by using the same frequency. Experiments that involve the detection of a very weak microwave noise field require designing, fabricating, and verifying an electronic source of modulated current to feed the noise emitters. This source will eventually be integrated in both a microwave radiometry system to measure the parameters of materials and in the tomography. The project involves designing, developing, and measuring electronic circuits, with circuit simulations where necessary.
At the Department of Theoretical and Experimental Electrical Engineering, a unique setup was developed to detect partial discharges in power transformers. The system is currently in regular use at the South Moravian Region’s Dukovany nuclear power plant. The concept relies on the multi-channel reception of an irradiated electromagnetic signal; the signal’s frequency is between hundreds of MHz and the microwave band, spanning from tens of picoseconds to nanoseconds. This system features a drawback in that sensing antennas have to be installed in the transformer vessel. Recently, the everyday operation of the setup has produced the requirement to sense the signal outside the vessel, as the structural gaps allow the signal to leak inside. For such purposes, an external sensor has already been developed and partially tested. The assignment then rests in expanding the sensor testing cycles to enable the sensor to approach real-world conditions and in designing and verifying the options to sense the signal with the external sensor while eliminating the impact of external disturbance. Thus, the applicant is expected to work with vf measuring tools and to design applicable electronic circuits.