National Repository of Grey Literature 19 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Flexible substrate antennas
Sedlák, Jakub ; Puskely, Jan (referee) ; Mikulášek, Tomáš (advisor)
This diploma thesis deals with a design of antennas based on a flexible substrate. There is also a design of a transmission line between a flexible and rigid substrate with FLEX- RIGID technology. In the first part of thesis, there is the technology, advantages and disadvantages of using this technology in design of antennas mentioned. There are also basic antenna parameters mentioned. In second part, the design of a transmission line and four antennas is presented. Two of these antennas are manufactured and measured. Finally, the measured parameters are compared with the simulated results.
Horn antenna with suppressed side-lobe radiation
Kaděra, Petr ; Puskely, Jan (referee) ; Mikulášek, Tomáš (advisor)
This master´s thesis is focused on the ways of possible realisation of the directive horn antenna with suppressed side lobes in the frequency bands 71-76 GHz and 81-86 GHz. In this thesis a detailed research of the feasible options including parameters comparison and assessment of pros and cons of the particular solutions has been performed. Among the specified technical requirements, the emphasis has been placed on the manufacturing options and low cost availability of the materials applicable for the given antenna. The main part of the thesis deals with the conical horn antenna loaded with a hyperbolic dielectric lens, further the antenna with flat dielectric lens based on a transmitarray and also the integrated elliptical lens antenna. The following part of the thesis deals with the possibilities of characterizing the properties of the dielectric material of the lens.
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.
Antennas integrated into the window of the car
Bílek, Ondřej ; Puskely, Jan (referee) ; Kufa, Martin (advisor)
The aim of this work is design and implementation of FM and DAB antenna for radio transmitting and antenna for GSM 900, GSM 1800 and 2.4 GHz WiFi which could be implemented into the rear window car. Selected problem is solved by using microstripe antennas placed on a substrate. The antennas were designed by full-wave software CST Microwave Studio 2013.
Loop antennas for medical applications
Zejda, Luboš ; Puskely, Jan (referee) ; Raida, Zbyněk (advisor)
This thesis is focused on the design of loop antennas for medical applications. The main goal of this thesis is to verify the functionality of published designs of broadband loop antennas, and to compare them with each other. Compared antennas are modified for available substrate and a specified frequency. Antenna with best parameters is selected, manufactured and its characteristics are compared with simulations. Design and simulation software used is CST Microwave Studio.
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.
Antenna for in-car UWB communication
Špůrek, Jan ; Puskely, Jan (referee) ; Raida, Zbyněk (advisor)
This bachelor’s thesis is focused on the design of a wireless UWB network inside a car. The project is divided into three parts. In the first part, we describe the design of suitable antennas and feeding structures. The second part is focused on the simulation of a reciprocal communication for each type of the antenna in free space. In the third part, we investigate the effect of interference caused by near parts of the car for each type of the antenna. The results are then evaluated and the most suitable antenna is chosen for realization. The fourth part describes modifications of the antenna for SMA connector, which is necessary for measurement. In the fifth part we discuss measured results and compare them with assumptions from simulations. Results of the thesis are summarized in the conclusion.
SIW slot antenna
Martinec, Matěj ; Puskely, Jan (referee) ; Pítra, Kamil (advisor)
This work is dealing with the design of waveguide slot array antenna and SIW slot antenna with coaxial and microstrip feed operating in 5,6 GHz frequency in Wi-Fi frequency band of IEEE 802.11ac standard. For design of these antennas were used calsic methods and each of this parts were optimised in CST Microwave Studio. In this programme were optimised parameters of each part to occupy widest bandwidth of antenna, which was in conflict with the proper function of antenna. All antennas were compare between each other in light of selected parameters and suitable antenna has been chosen.
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.
Multiband Patch Antenna
Šebesta, Jiří ; Puskely, Jan (referee) ; Všetula, Petr (advisor)
Semestral thesis deals with design, numerical modeling and optimalization of lineary polarized patch antennas in program CST Microwave studio. In this thesis, various types of feeding methods and various methods for achieving multiband behaviour of patch antennas are compared.

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