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High-Gain Millimeter-Wave Lens Horn Antennas
With Suppressed Side-Lobe Radiation
Kaděra, Petr
The paper introduces high-gain conical lens horn antennas with suppressed side lobes for the frequency band 71-76/81-86 GHz (E-band) which is dedicated for point-to-point communication. Two concepts of dielectric lenses are proposed. The first lens is of hyperbolical shape and the other one is flat with perforation based on a transmitarray. Both of the proposed antennas were simulated in CST MWS. The gain is above 38 dBi and the side-lobes exceed -15 dB level.
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Energy Harvesting Demonstrator for GSM Band
Kaděra, Petr
The presented paper introduces the basic ideas and methods of wireless power transfer along with the design of antennas for energy harvesting demonstrator for use in GSM band with the aid of commercial available integrated circuit Powercast P2110B. The energy harvesting demonstrator should operate from - 12 dBm input power and utilize E-slot patch antenna or biplanar Yagi-Uda antenna for its work. The antennas were designed in CST Microwave studio, consequently fabricated and their input reflection coefficient measured and compared with simulation.
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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.
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LABORARTORY BRNO
Kaděra, Petr ; Kadlčík, Petr (referee) ; Wahla, Ivan (advisor)
The object of the bachelor thesis was an architectural design of a gallery of architecture, design and contemporary art situated in Brno. The main idea was to build two independent buildings - the gallery and the office building. The shape of the gallery consists of two annexes which collide in central glass prism and the office building finishing the important view city axis. The result is an concept of modern buildings which do not distort the local scale.
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Energy harvesting demonstrator
Kaděra, Petr ; Mikulášek, Tomáš (referee) ; Mrnka, Michal (advisor)
This semestral thesis is focused on radio frequency energy harvesting. The thesis describe parts of network that are essential for conversion of radio frequency energy into DC. It deals with various solutions to the given problem. The aim of the thesis is to design a proper antenna with supplemental circuits for commercial Powercast P2110B receiver which combines the function of a rectifier and a step-up DC/DC converter.
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New town hall for the district Brno-North
Kaděra, Petr ; Vágner, Lukáš (referee) ; Jura, Pavel (advisor)
This Master's thesis project decribes the new town hall for the district of Brno-north. The proposal is based on an idea of an intersection of two elementary solids. The room layout is similar to the concept and is divided into a part for state administration and a part for self-government. The building also consists of a conference hall and a cafe in which the cultural events can take place. The architecture solution is barrierless with regard to the principles of sustainable development.
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