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Wideband Vector Measurements
Dvořák, Radek ; Schejbal, Vladimír (referee) ; Dražan, Libor (referee) ; Urbanec, Tomáš (advisor)
Thesis describing design and measurement of the vector reflectometer system based on six port principle. The expectations for precision measurement in wide bandwidth system are explained. Diode linearization problem is described and the calibration method especially designed for the wide band systems is explained. And finally several data processing methods for the final result decision are compared.
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Wideband planar antenna
Večerka, Kamil ; Lukeš, Zbyněk (referee) ; Raida, Zbyněk (advisor)
In this semester work is analyzed broadband planar antennas published in foreign literature, which represents the current trend of planar antennas. It describes the overall design of the antenna including a description and enter your own simulation program Ansoft Designer, comparing simulations for various types of additional resonators and their influence on the resulting frequency characteristics.
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Slot-spiral antenna array
Blažek, Jiří ; Pítra, Kamil (referee) ; Raida, Zbyněk (advisor)
The semestral thesis considers a Archimedean spiral slotted leaky-wave antenna as having a beneficial antenna parameters [7], thus aiming at reproducing the results so as to either validate or disprove them. The antenna is fabricated in a way of commonly known leaky-wave antenna, which is based on a substrate-integrated waveguide. Archimedean spiral slots are introduced into the substrate, creating unique structure fed by coaxial conductors. Moreover, claiming to attain beam switching ability, double-layer substrate-integrated waveguide is proposed, having four feeding ports. Both aforementioned structures are created, simulated and comparison is made using the ANSYS HFSS software.
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Wideband planar antenna
Večerka, Kamil ; Lukeš, Zbyněk (referee) ; Raida, Zbyněk (advisor)
In this semester work is analyzed broadband planar antennas published in foreign literature, which represents the current trend of planar antennas. It describes the overall design of the antenna including a description and enter your own simulation program Ansoft Designer, comparing simulations for various types of additional resonators and their influence on the resulting frequency characteristics.
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Wideband Vector Measurements
Dvořák, Radek ; Schejbal, Vladimír (referee) ; Dražan, Libor (referee) ; Urbanec, Tomáš (advisor)
Thesis describing design and measurement of the vector reflectometer system based on six port principle. The expectations for precision measurement in wide bandwidth system are explained. Diode linearization problem is described and the calibration method especially designed for the wide band systems is explained. And finally several data processing methods for the final result decision are compared.
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