Fractal Antennas
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 ajinapjohn Active In SP Posts: 5 Joined: Jul 2010 10-07-2010, 04:47 AM i want 2 get a seminar and presentation report on fractal antenna including its featvres,advantages disadvantages etc
 project report maker Active In SP Posts: 119 Joined: Jul 2010 11-07-2010, 01:11 PM please make a look on topicideashow-to-fractal-antennas-a-novel-miniaturization-technique-for-wireless-communications and topicideashow-to-fractal-antennas to get more idea on fractal antenna Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
 seminar class Active In SP Posts: 5,361 Joined: Feb 2011 02-04-2011, 02:44 PM INTRODUCTION In the study of antennas, fractal antenna theory is a relatively new area. The term fractal was coined by the French mathematician B.B. Mandelbrot during 1970s after his pioneering research on several naturally occurring irregular and fragmented geometries not contained within the realms of conventional Euclidean geometry. Fractal geometry accurately characterizes many non-Euclidean features of the natural including the length of coastline, branching of trees and density of clouds and finds their application in many engineering field. Fractal shaped antenna is becoming useful way to design advanced antenna such as multiband antenna with approximately the same input or radiation characteristics for different frequency band. DESIGNING OF FRACTAL ANTENNAS A fractal antenna's response differs markedly from traditional antenna designs, in that it is capable of operating with good-to-excellent performance at many different frequencies simultaneously. Normally standard antennas have to be "cut" for the frequency for which they are to be used—and thus the standard antennas only work well at that frequency. This makes the fractal antenna an excellent design for wideband and multi-band Applications. APPLICATIONS OF FRACTAL ANTENNAS There are many applications that can benefit from Fractal antennas. Discussed below are several ideas where Fractal antennas can make a real impact. The sudden grow in the wireless communication area has sprung a need for Compact integrated antennas. The space saving abilities of Fractals to efficiently fill a limited amount of space create distinct advantage of using integrated fractal antennas over Euclidean geometry. Examples of these types of application Include personal hand-held wireless devices such as cell Phones and other wireless mobile devices such as laptops on Wireless LANs and network able Pad Fractal antennas can also enrich applications that include Multiband transmissions. This area has many possibilities ranging from dual-mode phones to devices integrating
 seminar class Active In SP Posts: 5,361 Joined: Feb 2011 12-04-2011, 09:09 AM Presented by:- Saurav Dwivedi   malviya pandit 36.ppt (Size: 602.5 KB / Downloads: 142) Over view of antenna  A fractal antenna is an antenna that uses a fractal, self-similar design to maximize the 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.  Fractal antennas are also referred to as multilevel and space filling curves, but the key aspect lies in their repetition of a motif over two or more scale sizes,[1]or "iterations". For this reason, fractal antennas are very compact, are multiband or wideband, and have useful applications in cellular telephone and microwave communications. history  The first fractal "antennas" were, in fact, fractal "arrays", with fractal arrangements of antenna elements, and not recognized initially as having self-similarity as their attribute. Log-periodic antennas are arrays, around since the 1950s (invented by Isbell and DuHamel), that are such fractal arrays. They are a common form used in TV antennas, and are arrow-head in shape.  An example of a fractal antenna: a space-filling curve features  The physical size of the antenna is unrelated to its resonant or broadband performance.  Fractal element antennas are shrunken compared to conventional designs, and do not need additional components.  Electrical resonances may not be directly related to a particular scale size of the fractal antenna structure. Advantages of fractal • minituratization.  better input impedance matching  wideband/multiband (use one antenna instead of many)  frequency independent (consistent performance over huge frequency range)  reduced mutual coupling in fractal array Didvantages • gain loss • complexity • numerical limitations APPLICATIONS OF FRACTALANTENNAS  Applications include in personal hand held wire less device such as laptops on wireless LAN.  It can also enrich application that include multiband transmission.  Dual mode phone to device integrating. CONCLUSION  Many variations of fractal geometries have been incorporated into the design of antennas. Further work is required to get an understanding of the relationship between the performance of the antenna and the fractal dimension of the geometry that is utilized in its construction.
 seminar addict Super Moderator Posts: 6,592 Joined: Jul 2011 16-01-2012, 10:32 AM to get fractal antenna ppt, explanation and related topics link page bellow topicideashow-to-fractal-antennas topicideashow-to-fractal-antennas-a-novel-miniaturization-technique-for-wireless-communications topicideashow-to-fractal-antennas-design-characteristics-and-application topicideashow-to-super-wideband-fractal-antenna-design

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