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Planar antenna array for receiving the digital tv signal
Havelka, Michal ; Hertl, Ivo (referee) ; Raida, Zbyněk (advisor)
The master’s thesis deals in first part with the design of a single antenna element of an antenna array for receiving the digital TV. The resonant frequency of the antenna is 4.7 GHz, the antenna operates in the frequency band 4.4 to 5.0 GHz. Properties of the antenna are verified in programs CST Microwave Studio and Ansoft Designer. The final antenna element is experimentally produced. The second part is devoted to microstrip divider, 2x2 elements antenna array and 4x4 elements antenna array. The antenna array 4x4 elements was produced and its properties were measured.
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Multiband antenna design in ANSOFT Designer
Šulc, Ivo ; Řezníček, Zdeněk (referee) ; Raida, Zbyněk (advisor)
The project is focused on modeling multiband planar antennas in the program ANSOFT Designer. First, the methodology of the design and modeling of a patch antenna in ANSOFT Designer is described. Second, four types of multiband planar antennas are analyzed. The planar antenna is chosen in next step which is optimalized and subsequently produced. Finally, the analyzed antennas are mutually compared.
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Planar and Chip Antennas on Printed Circuit Boards
Novák, Lukáš ; Láčík, Jaroslav (referee) ; Urbanec, Tomáš (advisor)
This work is focused on the rules for proper deployment of chip and planar antennas on circuit boards due to the spatial and polarization diversity, their interaction and placement of antennas on printed circuit boards, also includes simulation of various deployment of selected chip and planar antennas, last part is focused on realization and measurement of selected case of placement.
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Dual-Band Helix Antenna for WiFi band
Šrajbr, Michal ; Tkadlec, Roman (referee) ; Pítra, Kamil (advisor)
This master’s thesis is focused on the properties and types of helical antennas. The helical antenna work in the different modes. These modes are described in this thesis. There are also discussed possibility for design a dual-band helical antennas. The main aim of this work is the selection of a suitable solution and design a dual-band helical antenna for the WiFi band working at resonance frequencies of 2,4 GHz and 5 GHz. The simulation of this antenna was performed in the program CST Microwave studio.
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Circularly polarized textile-integrated antenna array
Rujzl, Miroslav ; Láčík, Jaroslav (referee) ; Raida, Zbyněk (advisor)
This bachelor thesis deals with the design of the right-hand circularly polarized antenna arrays operated in the ISM band 5.8 GHz. The planar antenna array is integrated into the 3D textile produced by SINTEX, which is used as upholstery on the roof of a car. In the thesis, several antenna models are described. Models operate with linear and circular polarization. Initial antenna designs were based on a microstrip technology. Later antenna designs are modified using substrate integrated waveguide technology. Finally, a three-element patch array with a coaxial excitation was fabricated and tested.
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Improving antenna parameters by the application of metamaterials
Šporik, Vladimír ; Hertl, Ivo (referee) ; Raida, Zbyněk (advisor)
The thesis is focused on the design of a planar resonant-type antenna, which exploits a proper combination of left- and right-handed properties of transmission lines. This transmission line is called CRLH TL and is based on Sievenpiper mushroom structure. Advantages of the proposed antenna concept are demonstrated by a detailed comparison of its basic properties with the properties of a conventional patch antenna.
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Antenna for universal transmitter
Daněk, Jan ; Láčík, Jaroslav (referee) ; Láčík, Jaroslav (advisor)
This work describes an electrically small antennas used for mobile devices in the ISM band. The aim of this work is to select an antenna for a universal transmitter/receiver working in the 868 MHz band. The work contains description of the universal transmitter/receiver, and a list of suitable antennas. Tolerance analysis is performed by numerical model. The proposed antenna is manufactured and measured.
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Antenna for smart watch
Hájek, Miroslav ; Láčík, Jaroslav (referee) ; Cupal, Miroslav (advisor)
The objective of this work is a create a smart watch antenna, that will operate in two frequency bands. These are GSM (1.8 GHz) and ISM (2.4 GHz) bands. This antenna must be able to work when be placed on an elastic material that is used as a smart watch belt. Antennas options are analyzed and their suitability for given use. There is also an antenna model in CST microwave studio, where all the simulations were made. The antenna is also simulated on human hand models that have different dimensions and tissue ratios.
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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.
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