Fractal shaped recon gurable antennas hybrid antenna design approaches, which combine fractal shapes and electronic recon gurability, are presented in this section. Analysis and design of slotted substrate integrated waveguide antenna on cylindrical surface submitted by omer bayraktar in partial fulfillment of the requirements for the degree of doctor of philosophy in electrical and electronics engineering department, middle east technical university by, prof. Dielectric resonator antenna and array concepts based on glass. The first application of fractals to the field of antenna theory.
Fractal antennas as we see fractals have been studied for about a hundred years and antennas have been in use for as long. It has been accepted for inclusion in theses by an authorized administrator of rit. This antenna has low profile with dimensions of 80x80x1. Design of fractal slot antennas for wlan and wimax. Design and analysis of new geometry for microstrip patch sierpinski carpet fractal antenna is discussed. Nathan cohen professor of boston university designed, engineered and patented many practical fractal antenna solutions. Fractal antennas uses a fractal design to maximize the perimeter of the material that can receive and transmit electromagnetic radiation within a given total surface area or volume. Project report on antenna design, simulation and fabrication this project report is submitted to vnit in partial fulfillment of the requirements for the degree of bachelor of technology in electronics and communication under the guidance of dr. Pdf to design, simulate and fabricate fractal antenna for a user defined frequency at 1. Tech reetta kuonanoja for guiding me during the research process and commenting this thesis. This fractal structure is implemented on square and several iterations are applied on initial shape. The purpose of this article is to provide an overview of recent developments in the theory and design of fractal antenna arrays.
The feed source point of this antenna is placed at the origin 0, 0, 0, and this source is set to 1 volt. Microstrip antenna has several advantages over conventional antenna. How to make fractal antennas fractal antenna design. An overview of fractal antenna engineering research ieee. Fractal antenna constructions do it easy with scienceprog.
Antenna theory home antenna designers are always looking to come up with new ideas to push the envelope for antennas, using a smaller volume while striving for every higher bandwidth and antenna. In this thesis we have adopted the rsma patch antenna model that is capable of producing ultra wide band. Design of a broadband antenna element for lte base station antennas master of science thesis marie strom department of signals and systems division of signal processing and antennas chalmers university of technology goteborg, sweden, 2009 report no. The uwb characteristics of the antenna are achieved by truncating the lower ends of the rectangular microstrip patch, and the notch. Design of a broadband antenna element for lte base station. The most widely used corrugated horn antennas are conical in shape. Design and analysis of new sierpinski carpet fractal antenna.
An overview of fractal antenna engineering research abstract. One uwb antenna can be used to replace multi narrowband antennas, which may effectively reduce the antenna number. First publications about electrodynamic characteristics of fractal structures were published in the 1980s, but the first practical approach appeared after 10 years. Recent efforts by several researchers around the world to combine fractal geometry with electromagnetic theory have led to a plethora of new and innovative antenna designs. Also explore the seminar topics paper on fractal antennas with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year electronics and telecommunication engineering or ece students for the year 2015 2016. Fractal antenna can meet the requirements of designing a multiband, low profile and small antenna. Compact antenna arrays for efficient direction of arrival estimation. It must be stressed that chus definition of the factor is a general concept that applies even when the antenna is not resonant.
This report, together with a presentation, is the result of the thesis for the international. The objective of this thesis is to present an analysis of antennas, which are applicable to wireless sensor networks and, in particular, to the requirements of the speckled computing network consortium. Dethalia abstract this paper presents the fifth iterative micro strip fractal antenna for multifrequency operation. A novel miniaturized, multiband f shape fractal antenna. A circular polarized aperture fed microstrip patch antenna operating at 5. The thesis also presents a comparison between the designed fractal antenna and a conventional patch antenna outlining the advantages of fractal antenna over the later one.
A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. The design frequency has been chosen to be 750 mhz for which the design wavelength. Design and analysis of microstrip patch antenna using. The result of these properties are size reduction, multiband and enhanced gain of antenna etc. Achieving a low antenna basically depends on how efficiently it uses the available volume inside the radiansphere. Fractal antennas seminar report, ppt, pdf for ece students. Because of all these reported advantages, the research reported in this thesis is primarily focused on developing a low powered fractal antenna. Henrique salgado for proposing this thesis about fractal antennas and for all the support he gave me during the whole thesis. Fractal antennas can take on various shapes and forms. An actual fractal antenna is designed and the results compared to the baseline case. Fractal antennas for wireless communication systems filipe monteiro lopes. A rectangular notchband uwb antenna with controllable.
D thesis,gastric cancer phd thesis acknowledgements dissertation family dissertation titles in rguhs phd thesis on patch antenna master thesis in communication engineering. Dna is a fractal antenna in electromagnetic fields. Isbell and raymond duhamel individual componentsdipoles length and spacing of elements of lpa increase logarithmically from 1 end to the other z and r characteristics that are regularly repetitive as a logarithmic function of the excitation frequency multielement. Goubau antenna 12 with one of the lowest reported antennas. Design and analysis of fractal and conventional linear array. This link is listed in our web site directory since sunday feb 12 2012, and till today fractal antenna for ham radio bands has been followed for a total of 4165 times.
Mar 28, 2007 among the usual antennas used in todays data transfer, there are also different type of antennas used. Nov 06, 2015 fractal antenna for aerospace navigation 1. Also, fractal antennas can operate efficiently at onequarter the size of more traditional designs. This paper presents a new miniaturized f shape fractal antenna to achieve multiband characteristics using hfss. Page 27 corrugated horn antenna corrugated gaussian profiled horn.
Aug 26, 2016 because of the complexity of building an antenna using repeating patterns whose angles, leg dimensions, and overall pattern must be precisely executed for optimum performance, fractal antennas have not yet made significant inroads into hf operation, especially the lower frequencies longer wavelengths. How to make a homemade fractal antenna for hd and digital tv. A fractal antenna is an antenna that uses a fractal, selfsimilar design to maximize the effective length, or increase the perimeter on inside sections or the outer structure, of material that can receive or transmit electromagnetic radiation within a given total surface area or volume. There are similar effects in the ionising range, but the reactions are more complex. Design and analysis of fractal and conventional linear array antennas a. Fractal antenna for ham radio bands resource detail the. I also want to thank nokias 5g team and antenna team for their full support and giving me the opportunity to advance in my studies and begin. This thesis is brought to you for free and open access by rit scholar works. Before diving into the technically heavier parts of this thesis i would like to. I received fractal antenna phd thesis high grade and positive feedback from my instructor.
Normalized gain pattern of the antenna in the x z solid line and y z dotted line planes for a case 1, b case 2 and c case 3 ramadan et al. In this research work, a metamaterial lens constructed from cubic high dielectric resonators chdr embedded in a low dielectric slab was placed in front of a circular patch and a fractal patch antenna respectively, in order to characterize the effects on the antenna parameters, specifically the gain, as a result of the antenna and lens coupling. Fractal antennas for wireless communication systems. The aim of the thesis is to design and fabricate a line feed rectangular microstrip patch antenna and study the effect.
The probability density function pdf of the measured output in 2. Introduction antenna is a transducer designed to transmit or receive electromagnetic waves. One of the properties of fractals geometry is that it can have an infinite length while fitting in a fin. Design and analysis of fractal antennas for wideband applications a thesis submitted in partial fulfilment of the requirements for the degree of bachelor of technology in electronics and communication engineering by ombeni kanze kennedy roll no. Design and analysis of fractal antennas for wideband applications. M prasad 3 assistant professor, department of ece, gitam university, visakhapatnam, andhra pradesh, india. The wide frequency range of interaction with emf is the functional characteristic of a fractal antenna, and dna appears to possess the two structural characteristics of fractal antennas, electronic conduction and self symmetry. I had no time to compete my dissertation, but my friend recommended this website. Here the inventor of fractal antennas, with more than 50 years of antenna experience, scientifically debunks a study that claims that. Ultra wide band rsma patch antenna free download abstract. Explore fractal antennas with free download of seminar report and ppt in pdf and doc format. On the behavior of the sierpinski multiband fractal antenna.
One foreseen associated problem with the antenna design for airplanes is that a single antenna supports multiple frequencies and consumes less space hence a fractal patch antenna is designed in this thesis work that has desired multiband resonance and compact profile. Design of a multiband stacked microstrip patch antenna for satellite. The fractal antenna not only has a large effective length, but the contours of its shape can generate a capacitance or inductance that can help to match the antenna to the circuit. For example, a quarter wavelength monopole can be transformed into a similarly shorter antenna by the koch. The second paper i ordered was a research report on history. Portable antennas are required to fit for today digital equipment. Having never encountered a situation where a fractal antenna has been used, i decided to build up a triangle fractal antenna and test it, as i evolve it from a simple bowtie antenna through iterations to become a fractal. Jul 21, 2016 do fractal antennas work better than other antennas. I know that fractal antenna phd thesis it is a time consuming job to write dissertations.
Nov 30, 2016 fractal antenna fractal term was first coined by benoit mandelbrot in 1983 to classify the structure whose dimensions were not whole numbers. Fractal patch antenna for aerospacenavigation authorstream. A bandpass filter for general purpose is designed at 5. Jun 03, 2016 fractal antenna is merely useful for the miniaturization of wireless communication system. Objective to provide a study of different fractal antenna with an overview of recent developments. Download and print antenna template print out one copy each of part 1 and part 2 of the. The fractal antenna has been designed on substrate with dielectric constant. This is a valid argument, and some people love fractal antennas. The antenna is the most important element in the field of a wireless system to transmit and receive the electromagnetic radiations.
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