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Antennas for milimeter-wave bands
Pítra, Kamil ; Svoboda, Petr (referee) ; Raida, Zbyněk (advisor)
This thesis describes design and experimental verification of three types of the wideband antenna Bow-tie antenna, Vivaldi antenna and Spiral antenna. The tracked parameters are bandwidth, input impedance, gain and directivity patterns. Next step is design of millimeter-wave horn antennas. Attention is turned to the proper construction of a wideband feeder of the horn. For the final antenna structure, a bow-tie dipole and a Vivaldi antenna were chosen. The antenna construction is aimed to provide a wide bandwidth on one hand and a high gain on the other hand.
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Antenna array for Ku band
Prouza, Jakub ; Mikulášek, Tomáš (referee) ; Raida, Zbyněk (advisor)
This diploma thesis deals with the selection of antenna elements suitable for use in an ultra-wide band antenna array for radar applications. The selection is followed by the design and measurement of a prototype. The realized gain of the whole structure, the main beam width and the possibility of electronic beamforming in the horizontal plane are the most important parameters of the designed antenna array. The numerical model of the selected antenna element was developed, and parameters were verified to exploit the element in the antenna array. Afterwards, the array was created as a numerical model. Results produced by simulations were verified by measuring the prototype subsequently.
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Design of 3D Vivaldi antenna array for radar applications
Kašpar, Petr ; Pitra,, Kamil (referee) ; Puskely, Jan (advisor)
This master thesis deals with a design of Vivaldi antenna due to its broadband properties suitable for radar applications. The folding of single Vivaldi antenna element into 2D antenna array we achieved required radiation properties. Appropriate design of feeding structure realized by SIW technology we obtained suppression of side lobes and deflection of the main lobe. The work also includes design of 3D Vivaldi antenna array. Modeling, simulation and optimization of antenna array were performed in CST Microwave Studio.
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Vivaldi antenna fed by substrate integrated waveguide
Pavlíček, Rostislav ; Puskely, Jan (referee) ; Mikulášek, Tomáš (advisor)
The thesis deals with Vivaldi antenna design fed by substrate integrated waveguide (SIW). The first step in solving is focused on design this antenna in the simulation program Ansoft HFSS, where the antenna parameters are optimized gain, impedance bandwidth and minimizing the size of the side lobes. The result is the implementation of Vivaldi antenna structure SIW and compare the results with simulations. The work includes a comparison of simulated and measured parameters realized antenna.
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Vivaldi antenna fed by substrate integrated waveguide
Pavlíček, Rostislav ; Puskely, Jan (referee) ; Mikulášek, Tomáš (advisor)
The thesis deals with Vivaldi antenna design fed by substrate integrated waveguide (SIW). The first step in solving is focused on design this antenna in the simulation program Ansoft HFSS, where the antenna parameters are optimized gain, impedance bandwidth and minimizing the size of the side lobes. The result is the implementation of Vivaldi antenna structure SIW and compare the results with simulations. The work includes a comparison of simulated and measured parameters realized antenna.
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Broadband linear antenna array for BAN applications
Gaja, Tomáš ; Kufa, Martin (referee) ; Puskely, Jan (advisor)
The work deals with the design and the practical realization of a single element of antenna arrays and with the simulation of all elements of antenna arrays for application in BAN. The main attention is focused on the shaping of radiation pattern with suppression of unwanted side lobes. Based on these principles the script was created in MATLAB environment which effectively analyses features of each desired antenna array. The next section of this work is focused on design of narrowband Patch antenna and broadband Vivaldi antenna in frequency band ISM 5.8 GHz and supply network for antenna arrays. Designed antenna arrays were verified in simulator of electromagnetic field CST including their function and features in proximity of human tissue. These simulations were experimentally made only for a single element of antenna arrays. The results from measured radiation pattern were analyzed in script as array about eight elements.
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Antenna array for Ku band
Prouza, Jakub ; Mikulášek, Tomáš (referee) ; Raida, Zbyněk (advisor)
This diploma thesis deals with the selection of antenna elements suitable for use in an ultra-wide band antenna array for radar applications. The selection is followed by the design and measurement of a prototype. The realized gain of the whole structure, the main beam width and the possibility of electronic beamforming in the horizontal plane are the most important parameters of the designed antenna array. The numerical model of the selected antenna element was developed, and parameters were verified to exploit the element in the antenna array. Afterwards, the array was created as a numerical model. Results produced by simulations were verified by measuring the prototype subsequently.
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Planar Antenna Array For Ku Band
Prouza, Jakub
The paper deals with the design of an antenna element of an ultra-wideband antenna array for specialized applications. The realized gain of the whole structure, the main beam width and the possibility of electronic beamforming in the horizontal plane are the most important parameters of the designed antenna array. The numerical model of the antenna array is created, and parameters are verified to prove suitability for ultra-wideband applications.
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