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Conical Sierpinski monopole
Všetula, Petr ; Pavel,, Hazdra, (referee) ; Raida, Zbyněk (advisor)
The thesis deals with numerical modeling of planar Sierpinski monopole and modified Sierpinski monopole, outgoing from Sierpinski structure. Next, it focuses on modeling of the conical modified monopole and conical Sierpinski monopole created by transferring of modified structure to conical surface. The properties of these multi-band antennas are verified by simulations in CST Microwave Studio 2009 and compared with the results published in available literature. The conical Sierpinski monopole is then optimized according to specified criteria. The optimized antenna is designed and its properties are experimentally verified.
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Antenna for broadband impulse signal
Smutný, Martin ; Kořínek,, Tomáš (referee) ; Drexler, Petr (advisor)
The thesis describes retrievals of broadband antennas for VHF and UHF. It focuses on a compact antenna, potentially suitable for detecting electromagnetic impulses generated by electrical discharges in the dielectric oil in power transformers. This pulse signals are very steep with hundreds pico seconds rising edge. The thesis presents basic characteristics of antennas and selects those which have a major influence on the possibility of using the antenna in selected application. The appropriate antena is selected and proposal its geometrical parameters is discussed. The geometry of the selected antenna is designed for working bandwidth from about 200 MHz to about 1000 MHz. The newly designed double discon antenna is simulated and dimensions are optimized. Antenna is made and key characteristics of the antenna important for evaluate the ability of detecting the above-identified pulsed signals is measured. Antenna is compared with gain and characteristic of monocone antenna. Acquired knowledge and measured data are evaluated.
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Antenna for broadband impulse signal
Smutný, Martin ; Kořínek,, Tomáš (referee) ; Drexler, Petr (advisor)
The thesis describes retrievals of broadband antennas for VHF and UHF. It focuses on a compact antenna, potentially suitable for detecting electromagnetic impulses generated by electrical discharges in the dielectric oil in power transformers. This pulse signals are very steep with hundreds pico seconds rising edge. The thesis presents basic characteristics of antennas and selects those which have a major influence on the possibility of using the antenna in selected application. The appropriate antena is selected and proposal its geometrical parameters is discussed. The geometry of the selected antenna is designed for working bandwidth from about 200 MHz to about 1000 MHz. The newly designed double discon antenna is simulated and dimensions are optimized. Antenna is made and key characteristics of the antenna important for evaluate the ability of detecting the above-identified pulsed signals is measured. Antenna is compared with gain and characteristic of monocone antenna. Acquired knowledge and measured data are evaluated.
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Conical Sierpinski monopole
Všetula, Petr ; Pavel,, Hazdra, (referee) ; Raida, Zbyněk (advisor)
The thesis deals with numerical modeling of planar Sierpinski monopole and modified Sierpinski monopole, outgoing from Sierpinski structure. Next, it focuses on modeling of the conical modified monopole and conical Sierpinski monopole created by transferring of modified structure to conical surface. The properties of these multi-band antennas are verified by simulations in CST Microwave Studio 2009 and compared with the results published in available literature. The conical Sierpinski monopole is then optimized according to specified criteria. The optimized antenna is designed and its properties are experimentally verified.
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