<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=iso-8859-1"><meta name=Generator content="Microsoft Word 14 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
p.MsoAcetate, li.MsoAcetate, div.MsoAcetate
{mso-style-priority:99;
mso-style-link:"Texto de balão Carácter";
margin:0cm;
margin-bottom:.0001pt;
font-size:8.0pt;
font-family:"Tahoma","sans-serif";
mso-fareast-language:EN-US;}
span.EstiloCorreioElectrnico17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
span.TextodebaloCarcter
{mso-style-name:"Texto de balão Carácter";
mso-style-priority:99;
mso-style-link:"Texto de balão";
font-family:"Tahoma","sans-serif";}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:70.85pt 3.0cm 70.85pt 3.0cm;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=PT link=blue vlink=purple><div class=WordSection1><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'><img width=300 height=400 id="Imagem_x0020_1" src="cid:image003.jpg@01CCA90C.804AA8E0" alt="Descrição: http://1.bp.blogspot.com/_XJSj8yZNcEM/TTQ8VZMtybI/AAAAAAAACSk/wfVheNNnx-I/s400/IMG_1332.JPG"></span></b><b><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'><o:p></o:p></span></b></p><p><b>Antena fractal</b> é uma antena que usa um desenho <a href="http://pt.wikipedia.org/wiki/Fractal" title=Fractal>fractal</a> auto-similar para maximizar seu comprimento, ou perímetro de material que recebe ou transmite <a href="http://pt.wikipedia.org/wiki/Radia%C3%A7%C3%A3o_eletromagn%C3%A9tica" title="Radiação eletromagnética">radiação eletromagnética</a> através de uma área, superfície ou volume determinado.<o:p></o:p></p><p>As antenas fractais são mais versáteis que as antenas comuns, no sentido que operam bem em diversas frequências, ao contrários das antenas comuns que costumam operar bem apenas para uma faixa de frequências estreita para a qual são projetadas.<o:p></o:p></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'><o:p> </o:p></span></b></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>Fractals get great reception with do it yourself TV </span></b><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:7.5pt;font-family:"Verdana","sans-serif";color:#666666;mso-fareast-language:PT'>Press Release</span><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'> <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>Growing interest in free HDTV has created a new problem for millions: how to get better reception. <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>Do it yourself (DIY) experimenters have embraced the problem with an exotic new technology using <b>fractals</b> - intricate self similar shapes - as antennas. And along with better TV reception, they inadvertently explore the frontiers and marriage of mathematics and art with high tech, built on fractals. <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>“It’s gone from a ripple to a torrent. We used to get one or two TV antenna queries, now my email is peppered daily with happy thank-you’s for letting folks watch Family Guy without snowy signals ”, commented the inventor of the fractal antenna technology, <b>Nathan Cohen</b>.<br>”It’s grass roots, home grown fractal engineering, built out of fun and fueled by need.” <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>Home grown fractals are the origins of fractal electronics. Cohen started the field in the 1980’s by making DIY fractal antennas, shirking his professional scientist status to play out a hunch. The first fractal antennas were aluminum foil cutouts and bent wires.” I didn’t have a million dollar lab and a staff of 20 grad students. I had curiosity, simple supplies, and a practical problem to solve: how to build an unobtrusive ham radio antenna. To my happy surprise, fractals proved a natural for antennas and electronics” , commented Cohen. <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>In the years since, Cohen finds himself a pioneer in a growing field that probes the uses of fractals in engineering. Fractals have proven key to understanding Maxwell’s equations (the guiding laws for electromagnetics); making smaller electronic tuned circuits; and even wideband invisibility cloaks. New applications reducing drag on airfoils and hydrofoils, and cancer treatment are among those that signal the emergence of fractal engineering. <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>Like all new ideas, fractal antennas have had to pay their dues. “Although there are dozens of recent scientific publications on fractal antennas and fractal electronics from research teams all over the globe, the antenna field in the U.S. has been slow to accept the advantages There is a lot of ‘not invented here’ inertia, even though I invented them in the U.S.” But smart kids and thrifty home experimenters don’t have such inhibitions. They just started building them. And hooking them up to their TV’s. <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>What they got was a small antenna that works well across a wide frequency range, exactly what is needed for better TV reception. Cohen notes :“It’s gratifying to see others with the same curiosity that drove me 25 years ago. In 20 years, how many of fractal engineering’s innovators will have got their start by bending a wire for their HDTV?” <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>Cohen stresses the fractal antennas being built by DIY aren’t necessarily the best ones. “Most fractals will give you better TV reception , but only a handful of specific shapes work better than others. We have the computer and laboratory tools here that let us identify these.” <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span lang=EN-US style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'>Cohen’s firm, Fractal Antenna Systems, Inc., is the patent holder on fractal antenna and related technologies, and he stresses that an individual personally constructing one or two for experimentation is well within the allowance of the patent system. The firm makes antennas across the board for applications in the wireless world, but does not have an HDTV antenna--yet. Cohen said: “We realize some folks will want to buy their HDTV fractal antennas, so I am happy to report that we will be launching such a product in 2012. Leave that to us. We want to have some HDTV fun too.” <o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:12.0pt;font-family:"Verdana","sans-serif";mso-fareast-language:PT'><a href="http://www.fractenna.com" target="_blank"><span style='color:#0000CC;text-decoration:none'>http://www.fractenna.com</span></a><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>